{"id":4716,"date":"2026-08-11T13:45:07","date_gmt":"2026-08-11T05:45:07","guid":{"rendered":"https:\/\/www.solidess.com\/?p=4716"},"modified":"2026-08-11T13:45:07","modified_gmt":"2026-08-11T05:45:07","slug":"isikhokelo-somgaqo-nkqubo-wesivumelwano-sesiqinisekiso-sokufumaneka-kwe-bess","status":"publish","type":"post","link":"https:\/\/www.solidess.com\/xh\/bess-availability-guarantee-contract-formula-guide\/","title":{"rendered":"Isiqinisekiso Sokufumaneka kwe-BESS: Isikhokelo seFomula yeKontraki"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"4716\" class=\"elementor elementor-4716\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-bf4793c e-con-full auto-article-root e-flex e-con e-parent\" data-id=\"bf4793c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-87b243cb auto-p elementor-widget elementor-widget-heading\" data-id=\"87b243cb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">A <strong>BESS availability guarantee<\/strong> is useful only when the contract defines what the battery system must be capable of doing, during which hours, at which measurement boundary and with what evidence. This guide uses the <strong>MegSolid Energon 261.24kWh \/ 125kVA liquid-cooled C&amp;I system<\/strong> as the product-specific example. Its published 314Ah LFP battery, rated energy, rated apparent power and cooling method do not by themselves establish usable AC energy, guaranteed kW, service duration or availability.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-718c7f0a auto-image elementor-widget elementor-widget-image\" data-id=\"718c7f0a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"900\" height=\"900\" src=\"https:\/\/www.solidess.com\/wp-content\/uploads\/2026\/08\/BESS-Availability-Guarantee-Contract-Formula-Guide.png\" class=\"attachment-1536x1536 size-1536x1536 wp-image-4713\" alt=\"MegSolid engineering and contract team reviewing availability evidence beside the official Energon 261.24kWh 125kVA liquid-cooled BESS cabinets\" srcset=\"https:\/\/www.solidess.com\/wp-content\/uploads\/2026\/08\/BESS-Availability-Guarantee-Contract-Formula-Guide.png 900w, https:\/\/www.solidess.com\/wp-content\/uploads\/2026\/08\/BESS-Availability-Guarantee-Contract-Formula-Guide-300x300.png 300w, https:\/\/www.solidess.com\/wp-content\/uploads\/2026\/08\/BESS-Availability-Guarantee-Contract-Formula-Guide-150x150.png 150w, https:\/\/www.solidess.com\/wp-content\/uploads\/2026\/08\/BESS-Availability-Guarantee-Contract-Formula-Guide-768x768.png 768w, https:\/\/www.solidess.com\/wp-content\/uploads\/2026\/08\/BESS-Availability-Guarantee-Contract-Formula-Guide-600x600.png 600w, https:\/\/www.solidess.com\/wp-content\/uploads\/2026\/08\/BESS-Availability-Guarantee-Contract-Formula-Guide-100x100.png 100w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-07ce192b elementor-widget-mobile__width-inherit auto-list elementor-icon-list--layout-traditional elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"07ce192b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">\ud83d\udcd0 <strong>Formula:<\/strong> Decide whether availability is time-based or weighted by the fraction of contract capability remaining in each settlement interval.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">\u23f1\ufe0f <strong>Eligible time:<\/strong> Define the calendar, operating window, settlement interval, planned-maintenance allowance and start\/end timestamps.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">\ud83d\udcc9 <strong>Partial derating:<\/strong> Give proportionate credit when part of a modular system remains capable; do not force every event into a binary online\/offline result.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">\ud83d\udeab <strong>Exclusions:<\/strong> Assign grid outages, owner dispatch, force majeure, site conditions and communication failures only after cause and evidence are defined.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">\ud83e\uddfe <strong>Data:<\/strong> Fix the source hierarchy among dispatch records, revenue meter, SCADA, EMS, PCS, BMS, alarm logs and approved service reports.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">\u2696\ufe0f <strong>Remedy:<\/strong> Separate cure obligations, service credits, payment adjustment, corrective modification and persistent default; do not hide all consequences inside one percentage.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-288ff37e elementor-tablet-align-center elementor-align-center auto-cta elementor-widget elementor-widget-button\" data-id=\"288ff37e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6Ijk0OCIsInRvZ2dsZSI6ZmFsc2V9\" target=\"_blank\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Request a BESS Availability Definition Schedule<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c8322bd0 auto-h2 elementor-widget elementor-widget-heading\" data-id=\"c8322bd0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">h2: The Direct Answer: A BESS Availability Guarantee Must Measure Contract Capability<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-56fa1f83 auto-p elementor-widget elementor-widget-heading\" data-id=\"56fa1f83\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">The direct answer is to define availability as the proportion of eligible time during which the BESS can deliver the service-specific contract capability. MegSolid does not treat a green HMI icon as proof: a cabinet may be online yet unable to deliver the contracted charge power, discharge power, energy duration, reactive-power duty or remote response. The <strong><a href=\"https:\/\/www.solidess.com\/product\/megsolid-solid-liquid-energy-storage\/\" target=\"_blank\" style=\"color:#61ce70\">MegSolid Energon 261.24kWh \/ 125kVA product page<\/a><\/strong> supplies the controlled product starting point, while the <strong><a href=\"https:\/\/www.solidess.com\/how-to-read-a-ci-bess-warranty-throughput-dod-and-eol\/\" target=\"_blank\" style=\"color:#61ce70\">C&amp;I BESS warranty guide<\/a><\/strong> separately covers throughput, DOD and EOL obligations.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4360a25c auto-table elementor-widget elementor-widget-text-editor\" data-id=\"4360a25c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"cea-table-wrap\">\n<table>\n<thead>\n<tr>\n<th>Term<\/th>\n<th>Question it answers<\/th>\n<th>Typical evidence<\/th>\n<th>Do not substitute<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Availability (%)<\/td>\n<td>Could the system deliver the contracted service during eligible time?<\/td>\n<td>Time-aligned capability and event records<\/td>\n<td>HMI online state<\/td>\n<\/tr>\n<tr>\n<td>Reliability<\/td>\n<td>How often does the system or component fail?<\/td>\n<td>Failure events, operating hours and repair history<\/td>\n<td>Availability percentage alone<\/td>\n<\/tr>\n<tr>\n<td>Capacity \/ energy test<\/td>\n<td>How much AC power or energy can the system deliver under a defined test?<\/td>\n<td>Approved test procedure and meter results<\/td>\n<td>A monthly availability report<\/td>\n<\/tr>\n<tr>\n<td>Efficiency (%)<\/td>\n<td>How much energy out is obtained relative to energy in at a stated boundary?<\/td>\n<td>Metered charge\/discharge test<\/td>\n<td>Availability<\/td>\n<\/tr>\n<tr>\n<td>Warranty compliance<\/td>\n<td>Are throughput, operating window and maintenance conditions within the warranty?<\/td>\n<td>Warranty terms and operating history<\/td>\n<td>EPC or PPA availability remedy<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2d791e30 auto-p elementor-widget elementor-widget-heading\" data-id=\"2d791e30\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">The <strong><a href=\"https:\/\/www.sandia.gov\/app\/uploads\/sites\/163\/2021\/09\/SAND2016-3078R.pdf\" target=\"_blank\" style=\"color:#61CE70\" rel=\"noopener\">DOE-funded ESS performance protocol<\/a><\/strong> emphasizes defined applications, test criteria and comparable performance reporting. That principle matters contractually: \u201cavailable\u201d must point to a measurable duty. A peak-shaving project, backup-power project and ancillary-service project may require different capability tests even when they use the same hardware.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e33dcd51 auto-h2 elementor-widget elementor-widget-heading\" data-id=\"e33dcd51\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">h2: Choose the BESS Availability Calculation Before Issuing the RFQ<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4d9e3539 auto-p elementor-widget elementor-widget-heading\" data-id=\"4d9e3539\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">The RFQ should state the intended formula, reporting period and interval resolution. If bidders are allowed to propose different definitions after award, two identical percentages can represent very different obligations. The formula below is a drafting method, not a published MegSolid guarantee and not legal advice.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-456c95f6 auto-h3 elementor-widget elementor-widget-heading\" data-id=\"456c95f6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">h3: Binary Time-Based Availability<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-438bd5f5 auto-p elementor-widget elementor-widget-heading\" data-id=\"438bd5f5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">A simple time-based formula is <strong>A = (Eligible Hours \u2212 Unavailable Hours) \u00f7 Eligible Hours \u00d7 100%<\/strong>. It can work for a single, non-modular service where every included interval is clearly either available or unavailable. Its weakness is binary treatment: a system capable of 90% of contract power can be counted the same as a total outage, or incorrectly counted as fully available, depending on one threshold.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cb540a69 auto-h3 elementor-widget elementor-widget-heading\" data-id=\"cb540a69\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">h3: Capacity-Weighted Availability<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3632b434 auto-p elementor-widget elementor-widget-heading\" data-id=\"3632b434\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">For each eligible settlement interval <strong>i<\/strong> and contracted service <strong>s<\/strong>, define <strong>q\u209b,\u1d62 = min[1, max(0, Cavailable,s,i \u00f7 Crequired,s,i)]<\/strong>. Service availability is <strong>A\u209b = [\u03a3(\u0394t\u1d62 \u00d7 q\u209b,\u1d62) \u00f7 \u03a3\u0394t\u1d62] \u00d7 100%<\/strong>, and equivalent unavailable hours are <strong>EUH\u209b = \u03a3[\u0394t\u1d62 \u00d7 (1 \u2212 q\u209b,\u1d62)]<\/strong>. Cavailable is the maximum verified net AC service capability that could have been delivered or absorbed at the Contract Measurement Point during that interval.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a83e09d8 elementor-widget-mobile__width-inherit auto-list elementor-icon-list--layout-traditional elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"a83e09d8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"><strong>q\u209b,\u1d62 = 1.00:<\/strong> The full required capability for service s is verified during interval i.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"><strong>0 &lt; q\u209b,\u1d62 &lt; 1:<\/strong> Only a verified fraction of the required service capability remains available.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"><strong>q\u209b,\u1d62 = 0:<\/strong> The contracted service cannot be delivered or absorbed during the interval.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"><strong>Do not use actual dispatch as q:<\/strong> A standby interval or a low dispatch instruction may show zero or limited output without proving that the BESS lacked full capability.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"><strong>Do not use cabinet count as q:<\/strong> Online icons, PCS nameplates and the number of cabinets displaying ready do not prove net service capability at the contract boundary.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-690acd54 auto-image elementor-widget elementor-widget-image\" data-id=\"690acd54\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1200\" height=\"900\" src=\"https:\/\/www.solidess.com\/wp-content\/uploads\/2026\/08\/BESS-Capacity-Weighted-Availability-and-Partial-Derating.png\" class=\"attachment-1536x1536 size-1536x1536 wp-image-4714\" alt=\"Four aligned MegSolid Energon 261.24kWh 125kVA cabinets with one cabinet isolated for authorized service and the remaining service capability verified\" srcset=\"https:\/\/www.solidess.com\/wp-content\/uploads\/2026\/08\/BESS-Capacity-Weighted-Availability-and-Partial-Derating.png 1200w, https:\/\/www.solidess.com\/wp-content\/uploads\/2026\/08\/BESS-Capacity-Weighted-Availability-and-Partial-Derating-300x225.png 300w, https:\/\/www.solidess.com\/wp-content\/uploads\/2026\/08\/BESS-Capacity-Weighted-Availability-and-Partial-Derating-1024x768.png 1024w, https:\/\/www.solidess.com\/wp-content\/uploads\/2026\/08\/BESS-Capacity-Weighted-Availability-and-Partial-Derating-768x576.png 768w, https:\/\/www.solidess.com\/wp-content\/uploads\/2026\/08\/BESS-Capacity-Weighted-Availability-and-Partial-Derating-600x450.png 600w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-06eea104 auto-table elementor-widget elementor-widget-text-editor\" data-id=\"06eea104\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"cea-table-wrap\"><table><thead><tr><th>Illustrative interval<\/th><th>Duration (h)<\/th><th>Available capability q<\/th><th>Equivalent unavailable hours (h)<\/th><\/tr><\/thead><tbody><tr><td>Normal eligible operation<\/td><td>694<\/td><td>100%<\/td><td>0<\/td><\/tr><tr><td>Complete unavailable event<\/td><td>6<\/td><td>0%<\/td><td>6<\/td><\/tr><tr><td>Partial derating<\/td><td>8<\/td><td>50%<\/td><td>4<\/td><\/tr><tr><td>Partial derating<\/td><td>12<\/td><td>75%<\/td><td>3<\/td><\/tr><tr><td>Illustrative eligible total after the selected exclusion treatment<\/td><td>720<\/td><td>\u2014<\/td><td>13<\/td><\/tr><tr><td>Illustrative result<\/td><td>\u2014<\/td><td>A = (720 \u2212 13) \u00f7 720<\/td><td>98.19%<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0bb325b9 auto-p elementor-widget elementor-widget-heading\" data-id=\"0bb325b9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">This example uses invented numbers only to test the arithmetic: 694 + 6 + 8 + 12 = 720h; EUH = 6 + 4 + 3 = 13h; A = (720 \u2212 13) \u00f7 720 = 98.19%. It is not a MegSolid offer, target or historical result. When multiple Energon cabinets are proposed, one isolated cabinet does not automatically prove the remaining q because common switchgear, controls, transformer and auxiliaries may still constrain the whole system. The <strong><a href=\"https:\/\/www.solidess.com\/modular-cabinets-vs-containerized-ess\/\" target=\"_blank\" style=\"color:#61ce70\">modular cabinets versus containerized ESS guide<\/a><\/strong> helps identify those shared boundaries.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1a4a3d1f auto-h2 elementor-widget elementor-widget-heading\" data-id=\"1a4a3d1f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">h2: Define Eligible Hours and Excused Events Without Creating a Loophole<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-99fce01c auto-p elementor-widget elementor-widget-heading\" data-id=\"99fce01c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">The denominator often matters more than the headline percentage. Eligible time may be all calendar hours, defined on-peak hours, scheduled dispatch windows or hours when the owner has maintained the BESS within agreed operating restrictions. Do not use <strong>ineligible interval<\/strong> and <strong>excused unavailability<\/strong> interchangeably: an interval outside the service obligation is removed from both numerator and denominator; an interval the contract deems excused but available is retained in the denominator with q = 1.00. The contract must select one treatment and calibrate its guarantee threshold to that same treatment.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4fe72e54 auto-table elementor-widget elementor-widget-text-editor\" data-id=\"4fe72e54\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"cea-table-wrap\"><table><thead><tr><th>Event category<\/th><th>Possible treatment<\/th><th>Evidence required<\/th><th>Drafting risk<\/th><\/tr><\/thead><tbody><tr><td>Approved planned maintenance<\/td><td>Apply the selected ineligible\/excused treatment only within notice, timing and annual allowance<\/td><td>Approved schedule, work order, start\/end record<\/td><td>Unlimited planned maintenance can erase the guarantee<\/td><\/tr><tr><td>Grid or interconnection outage<\/td><td>Apply relief only when causation and risk allocation satisfy the selected treatment<\/td><td>PCC voltage, breaker state, utility notice, BESS state<\/td><td>Calling every zero-output interval a grid outage<\/td><\/tr><tr><td>Owner dispatch or operating restriction<\/td><td>Exclude the portion caused by a valid instruction<\/td><td>Dispatch command, SOC target, timestamp and response<\/td><td>Supplier cannot prove what would otherwise have been available<\/td><\/tr><tr><td>Ambient or site condition outside agreed envelope<\/td><td>Project-specific exclusion or derating rule<\/td><td>Independent\/site sensor, equipment sensor and signed envelope<\/td><td>Using an unverified weather source or undefined sensor<\/td><\/tr><tr><td>Force majeure<\/td><td>Follow the negotiated contract definition<\/td><td>Event notice, causation and mitigation record<\/td><td>Using force majeure for ordinary equipment failure<\/td><\/tr><tr><td>Communication loss<\/td><td>Count or exclude according to source and loss of service<\/td><td>Network, gateway, EMS and local-controller logs<\/td><td>Treating missing data as proof of either full availability or outage<\/td><\/tr><tr><td>Safety or emergency shutdown<\/td><td>Allocate by initiating cause<\/td><td>Protection event, alarms, site condition and investigation<\/td><td>Automatically excusing every protective trip<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9306bb2c auto-p elementor-widget elementor-widget-heading\" data-id=\"9306bb2c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">A public <strong><a href=\"https:\/\/www.anaheim.net\/DocumentCenter\/View\/54386\/ITEM-4---Battery-Energy-Storage-Agreement_FINAL\" target=\"_blank\" style=\"color:#61CE70\" rel=\"noopener\">Anaheim battery energy storage agreement<\/a><\/strong> provides a useful example of the drafting depth required: it retains total on-peak hours as the denominator, omits Excused Hours from unavailable hours, counts partial hours and weights an hour by the proportion of contract capacity available. That is one specific economic treatment, not a universal rule. Its percentages and payment adjustment are not MegSolid terms and should not be copied into a C&amp;I contract without commercial and legal review.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f75de974 auto-p elementor-widget elementor-widget-heading\" data-id=\"f75de974\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">An interval is excused only to the extent and for the duration that the claimed excused cause prevented the contracted service. A grid outage, owner restriction or force-majeure event does not erase an independent supplier-side unavailability that existed before or occurred concurrently. The party claiming relief should prove causation, affected capability and duration, mitigate the event, and apply relief only to the affected portion when some service capability remains.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0b6b84af auto-h2 elementor-widget elementor-widget-heading\" data-id=\"0b6b84af\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">h2: Partial Derating Requires a Service-Capability Matrix<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4d441fdd auto-p elementor-widget elementor-widget-heading\" data-id=\"4d441fdd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">A BESS can lose different capabilities independently. Calculate <strong>Acharge, Adischarge, Aenergy, Areactive and Aremote-dispatch<\/strong> separately when they represent different services or time windows. Use the lowest interval q only when the contract requires the capabilities simultaneously; otherwise combine service results only through a pre-agreed weighting method. One battery rack may reduce deliverable energy, one PCS block may reduce charge\/discharge power, and a communication failure may remove remote dispatch while local protection remains healthy.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-689db1ce auto-table elementor-widget elementor-widget-text-editor\" data-id=\"689db1ce\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"cea-table-wrap\"><table><thead><tr><th>Contracted service<\/th><th>Capability used for q<\/th><th>Measurement boundary<\/th><th>Additional condition<\/th><\/tr><\/thead><tbody><tr><td>Peak shaving<\/td><td>Available discharge kW relative to contracted kW<\/td><td>Agreed LV board or PCC<\/td><td>SOC and duration sufficient for the scheduled window<\/td><\/tr><tr><td>Energy shifting<\/td><td>Deliverable AC kWh relative to contract energy<\/td><td>Defined AC meter boundary<\/td><td>Initial\/terminal SOC, power, temperature, auxiliaries and SOC-control owner fixed<\/td><\/tr><tr><td>Backup power<\/td><td>Critical-load kW and required duration<\/td><td>Island bus \/ protected-load boundary<\/td><td>Grid-forming, transfer and restart sequence available<\/td><\/tr><tr><td>Reactive support<\/td><td>Absorbed and supplied kvar within the verified kVA envelope<\/td><td>PCC or agreed PCS boundary<\/td><td>Real-power point, PCC voltage and thermal limit stated; P\u00b2 + Q\u00b2 \u2264 S\u00b2<\/td><\/tr><tr><td>Remote dispatch<\/td><td>Accepted and executed command capability<\/td><td>EMS\/plant controller plus revenue meter<\/td><td>Communication path and fallback ownership defined<\/td><\/tr><tr><td>Multi-service obligation<\/td><td>Lowest q only for simultaneous duties; otherwise pre-agreed service weighting<\/td><td>One consistent contract boundary<\/td><td>Separate time windows and no double counting<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cefb60ad auto-p elementor-widget elementor-widget-heading\" data-id=\"cefb60ad\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Energy availability cannot be inferred from SOC or instantaneous telemetry alone. A deliverable-AC-energy determination must define initial SOC, terminal SOC, discharge or charge power, temperature, auxiliary loads, meter boundary, rest periods where applicable and responsibility for maintaining the required starting state. Normal monthly availability reporting can reference an approved capacity test, but it cannot replace that test.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ceea8033 auto-p elementor-widget elementor-widget-heading\" data-id=\"ceea8033\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">The <strong><a href=\"https:\/\/www.solidess.com\/why-pcs-bms-integration-fails\/\" target=\"_blank\" style=\"color:#61ce70\">PCS and BMS integration guide<\/a><\/strong> shows why battery status alone cannot establish whole-system capability. The <strong><a href=\"https:\/\/www.solidess.com\/engineering-the-5mwh-bess\/\" target=\"_blank\" style=\"color:#61ce70\">5MWh BESS architecture guide<\/a><\/strong> is also relevant when defining block, rack and common-balance-of-plant boundaries. Contract q should be based on the capability that reaches the agreed delivery point, not the number of components displaying \u201cready.\u201d<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8e8fa263 auto-h2 elementor-widget elementor-widget-heading\" data-id=\"8e8fa263\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">h2: Make SCADA and Meter Evidence Part of the Guarantee<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-764d0d55 auto-p elementor-widget elementor-widget-heading\" data-id=\"764d0d55\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">A formula cannot settle a dispute if the parties do not share a clock, data dictionary and source hierarchy. Availability evidence should be designed before FAT, not reconstructed after the first event. The data set needs the instruction, actual response, active limit, cause, exclusion evidence and return-to-service proof at compatible timestamps.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ce1dfeb8 auto-image elementor-widget elementor-widget-image\" data-id=\"ce1dfeb8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1200\" height=\"900\" src=\"https:\/\/www.solidess.com\/wp-content\/uploads\/2026\/08\/BESS-Availability-SCADA-Evidence-Chain.png\" class=\"attachment-1536x1536 size-1536x1536 wp-image-4715\" alt=\"Controls engineers reviewing time-aligned availability evidence while two official MegSolid Energon 261.24kWh cabinets remain visible behind glass\" srcset=\"https:\/\/www.solidess.com\/wp-content\/uploads\/2026\/08\/BESS-Availability-SCADA-Evidence-Chain.png 1200w, https:\/\/www.solidess.com\/wp-content\/uploads\/2026\/08\/BESS-Availability-SCADA-Evidence-Chain-300x225.png 300w, https:\/\/www.solidess.com\/wp-content\/uploads\/2026\/08\/BESS-Availability-SCADA-Evidence-Chain-1024x768.png 1024w, https:\/\/www.solidess.com\/wp-content\/uploads\/2026\/08\/BESS-Availability-SCADA-Evidence-Chain-768x576.png 768w, https:\/\/www.solidess.com\/wp-content\/uploads\/2026\/08\/BESS-Availability-SCADA-Evidence-Chain-600x450.png 600w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-35c15897 auto-table elementor-widget elementor-widget-text-editor\" data-id=\"35c15897\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"cea-table-wrap\"><table><thead><tr><th>Evidence field<\/th><th>Preferred source<\/th><th>Unit \/ state<\/th><th>Contract decision supported<\/th><\/tr><\/thead><tbody><tr><td>Dispatch instruction<\/td><td>Owner EMS, operator interface or signed schedule<\/td><td>kW, kvar, mode, raw UTC timestamp<\/td><td>What the BESS was required to do<\/td><\/tr><tr><td>Delivered response<\/td><td>Revenue-grade meter or agreed PCC meter<\/td><td>Net kW, kvar, kWh, sign convention and timestamp<\/td><td>What reached or was absorbed at the contract boundary<\/td><\/tr><tr><td>Available power\/energy limit<\/td><td>PCS, BMS and plant controller<\/td><td>kW, kVA, kvar, kWh or limit code<\/td><td>Fraction q and constraining subsystem<\/td><\/tr><tr><td>SOC \/ operating state<\/td><td>BMS and EMS<\/td><td>%, charge\/discharge\/standby\/fault<\/td><td>Whether duration or instruction was feasible<\/td><\/tr><tr><td>Grid and breaker state<\/td><td>PCC meter, protection relay and switchgear<\/td><td>V, Hz, breaker state, trip code<\/td><td>Grid exclusion or equipment event<\/td><\/tr><tr><td>Alarm and first-out cause<\/td><td>PCS, BMS, EMS and auxiliaries<\/td><td>Code, severity, source, timestamp<\/td><td>Cause allocation and event start<\/td><\/tr><tr><td>Maintenance action<\/td><td>Approved CMMS\/service report<\/td><td>Work order, personnel, parts, timestamps<\/td><td>Planned allowance and cure evidence<\/td><\/tr><tr><td>Authoritative time<\/td><td>NTP\/PTP or approved project time source<\/td><td>UTC, allowed drift, synchronization status<\/td><td>Event alignment across systems<\/td><\/tr><tr><td>Data quality \/ resolution<\/td><td>Meter, SCADA and historian<\/td><td>Quality flag, sampling rate, settlement interval<\/td><td>Whether a value is valid for calculation<\/td><\/tr><tr><td>Recovery test<\/td><td>Command plus agreed meter result<\/td><td>Target, actual, stabilization duration, pass\/fail<\/td><td>Event end and restored capability<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-572affb5 auto-p elementor-widget elementor-widget-heading\" data-id=\"572affb5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">The <strong><a href=\"https:\/\/www.sandia.gov\/app\/uploads\/sites\/163\/2023\/04\/Energy-Storage-Data-Submission-Guidelines-SAND-Report.pdf\" target=\"_blank\" style=\"color:#61CE70\" rel=\"noopener\">Sandia energy storage data guidelines<\/a><\/strong> explain why data access and time granularity should be prescribed early; insufficient access has caused project delays and redesign. Use the <strong><a href=\"https:\/\/www.solidess.com\/bess-scada-point-list-what-your-ems-must-send\/\" target=\"_blank\" style=\"color:#61ce70\">BESS SCADA point-list guide<\/a><\/strong> to turn these fields into tags, units, sign conventions, UTC timestamps, NTP\/PTP status, quality flags, sampling\/settlement granularity, access rights and raw-data retention. Revenue-meter data proves net delivery at the contract point; PCS, BMS and EMS data primarily explain available limits and causes. The <strong><a href=\"https:\/\/www.solidess.com\/bms-ems-communication-architecture-in-bess\/\" target=\"_blank\" style=\"color:#61ce70\">BMS and EMS communication architecture<\/a><\/strong> clarifies the source boundary so one data layer does not silently replace another.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2c1a15e2 auto-h2 elementor-widget elementor-widget-heading\" data-id=\"2c1a15e2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">h2: Fix Event Start, Recovery and Missing-Data Rules Before COD<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1d7c372e auto-p elementor-widget elementor-widget-heading\" data-id=\"1d7c372e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">The contract should not let either party choose timestamps after seeing the commercial result. An event begins at the start of the first settlement interval in which q falls below 1.00, as established by authoritative evidence. An alarm or notice is evidence, but it does not control the commercial timestamp. Recovery occurs only after the contracted service is restored at the Contract Measurement Point, active limiting conditions are cleared or accepted, and the system passes the agreed command or functional test for the specified stabilization period. A recurrence from the same unresolved cause within the agreed continuity window is treated as the same event.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8014cd72 elementor-widget-mobile__width-inherit auto-list elementor-icon-list--layout-traditional elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"8014cd72\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">1\ufe0f\u20e3 <strong>Synchronize clocks:<\/strong> Preserve raw UTC timestamps; specify the authoritative NTP\/PTP source, local-time display, daylight-saving treatment and permitted drift.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">2\ufe0f\u20e3 <strong>Freeze source priority:<\/strong> State when the revenue meter prevails over EMS, PCS, BMS, operator notes or supplier portal data.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">3\ufe0f\u20e3 <strong>Define interval rounding:<\/strong> Use actual partial intervals or a stated rounding rule; do not silently round every short event to a full hour.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">4\ufe0f\u20e3 <strong>Handle data gaps:<\/strong> Treat bad-quality flags as missing; define reconstruction-source order, submission deadline, burden of proof, default result when reconstruction fails and dispute deadline instead of assuming 0% or 100% availability.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">5\ufe0f\u20e3 <strong>Prove causation:<\/strong> Exclusions require time-aligned evidence showing that the excluded cause limited the contracted service.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">6\ufe0f\u20e3 <strong>Close the event:<\/strong> Require the agreed dispatch or functional test at the measurement boundary for the stabilization period, with active limits cleared or formally accepted.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-21d2289e auto-p elementor-widget elementor-widget-heading\" data-id=\"21d2289e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Communication loss is a good example of why cause matters. The <strong><a href=\"https:\/\/www.solidess.com\/what-happens-when-bess-ems-communication-fails\/\" target=\"_blank\" style=\"color:#61ce70\">BESS EMS communication-failure guide<\/a><\/strong> distinguishes local protection, fallback operation and remote-control loss. If a required remote-dispatch service is unavailable, the event may count even while local power electronics remain healthy. Conversely, a buyer-owned network outage should not automatically become supplier downtime without the agreed risk allocation.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9921530d auto-h2 elementor-widget elementor-widget-heading\" data-id=\"9921530d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">h2: Use a Remedy Ladder Instead of One Unqualified Penalty<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-492f95f1 auto-p elementor-widget elementor-widget-heading\" data-id=\"492f95f1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">The remedy should match the commercial harm and the supplier\u2019s ability to cure. A one-off shortfall, repeated block failure and persistent inability to meet the service definition are not the same event. The contract should also avoid duplicate recovery under availability, capacity, efficiency and warranty provisions for the same underlying loss unless explicitly intended.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-12bb4336 auto-table elementor-widget elementor-widget-text-editor\" data-id=\"12bb4336\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"cea-table-wrap\"><table><thead><tr><th>Remedy stage<\/th><th>Purpose<\/th><th>Typical trigger to define<\/th><th>Evidence \/ closeout<\/th><\/tr><\/thead><tbody><tr><td>Technical cure plan<\/td><td>Restore performance and prevent recurrence<\/td><td>First miss or specified trend<\/td><td>Root-cause analysis, actions, owner and due date<\/td><\/tr><tr><td>Service credit or payment adjustment<\/td><td>Reflect verified loss of contracted service<\/td><td>Availability below project threshold<\/td><td>Approved calculation and exclusion register<\/td><\/tr><tr><td>Corrective modification \/ redundancy restoration<\/td><td>Restore the affected service path or designed redundancy<\/td><td>Repeated or persistent service-capability shortfall<\/td><td>Design review, change control and acceptance test<\/td><\/tr><tr><td>Extended monitoring or support<\/td><td>Reduce recurrence and verify stability<\/td><td>High event frequency or unresolved intermittent issue<\/td><td>Enhanced data, reporting cadence and exit criteria<\/td><\/tr><tr><td>Persistent default \/ termination right<\/td><td>Address failure that cannot be cured commercially<\/td><td>Negotiated severe and sustained threshold<\/td><td>Formal notice, cure period and legal review<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3cefed66 auto-p elementor-widget elementor-widget-heading\" data-id=\"3cefed66\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Do not insert a generic target, liquidated-damages rate or termination threshold into the technical article. Those values depend on project revenue, service criticality, liability caps, insurance and governing law. The <strong><a href=\"https:\/\/www.solidess.com\/why-a-bess-fails-its-capacity-test-without-an-alarm\/\" target=\"_blank\" style=\"color:#61ce70\">BESS capacity-test failure guide<\/a><\/strong> should govern a capacity-test diagnosis; the availability schedule should reference that procedure rather than reclassifying every low-energy test as monthly downtime. Capacity augmentation belongs in the capacity-guarantee remedy only after the approved capacity test confirms a capacity shortfall.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5503592d auto-h2 elementor-widget elementor-widget-heading\" data-id=\"5503592d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">h2: Put These Fields in the BESS Availability Definition Schedule<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-01a89b3b auto-p elementor-widget elementor-widget-heading\" data-id=\"01a89b3b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">The <strong><a href=\"https:\/\/www.energy.gov\/cmei\/femp\/articles\/battery-energy-storage-system-procurement-checklist\" target=\"_blank\" style=\"color:#61CE70\" rel=\"noopener\">U.S. DOE BESS procurement checklist<\/a><\/strong> encourages buyers to define technical tasks and questions early. For availability, MegSolid recommends attaching one controlled schedule to the RFQ, technical agreement and final contract instead of scattering conflicting definitions across the datasheet, EMS functional description and commercial terms.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d394a143 auto-table elementor-widget elementor-widget-text-editor\" data-id=\"d394a143\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"cea-table-wrap\"><table><thead><tr><th>Schedule field<\/th><th>Buyer must state<\/th><th>Supplier must return<\/th><th>Approval gate<\/th><\/tr><\/thead><tbody><tr><td>Contracted service<\/td><td>Peak shaving, backup, energy shifting, grid service or combination<\/td><td>Supported operating modes and boundaries<\/td><td>Bid clarification<\/td><\/tr><tr><td>Capability baseline<\/td><td>Required kW, kVA, kvar, kWh, duration and delivery point<\/td><td>Model-specific capability and derating assumptions<\/td><td>Datasheet \/ SLD approval<\/td><\/tr><tr><td>Formula<\/td><td>Time-based or capacity-weighted method<\/td><td>Exceptions and calculation example<\/td><td>Contract schedule freeze<\/td><\/tr><tr><td>Eligible time<\/td><td>Calendar, seasons, on-peak windows and settlement interval<\/td><td>Maintenance constraints and operational dependencies<\/td><td>Contract schedule freeze<\/td><\/tr><tr><td>Exclusions<\/td><td>Allowed categories, caps, notice and causation standard<\/td><td>Required evidence and mitigation duty<\/td><td>Commercial\/legal approval<\/td><\/tr><tr><td>Data<\/td><td>Source priority, access, retention, clock and gap treatment<\/td><td>SCADA tag list and report format<\/td><td>Controls design freeze<\/td><\/tr><tr><td>Event process<\/td><td>Start, notice, response, recovery and dispute deadlines<\/td><td>Service escalation and return-to-service test<\/td><td>O&amp;M plan approval<\/td><\/tr><tr><td>Remedies<\/td><td>Cure, credit, corrective modification and persistent-default structure<\/td><td>Proposed obligations and limits<\/td><td>Commercial\/legal approval<\/td><\/tr><tr><td>Acceptance link<\/td><td>FAT, SAT and performance-test references<\/td><td>Traceable test procedures and reports<\/td><td>Pre-shipment \/ COD gate<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ec321eec auto-p elementor-widget elementor-widget-heading\" data-id=\"ec321eec\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">The <strong><a href=\"https:\/\/www.solidess.com\/bess-factory-acceptance-test-guide\/\" target=\"_blank\" style=\"color:#61ce70\">BESS factory acceptance test guide<\/a><\/strong> can verify point mapping, event recording, command response and block isolation before shipment. The <strong><a href=\"https:\/\/www.solidess.com\/epcs-evaluate-energy-storage-systems\/\" target=\"_blank\" style=\"color:#61ce70\">EPC energy-storage evaluation guide<\/a><\/strong> helps buyers align the guarantee with the actual project stage. Neither test creates a universal availability value; the final percentage, exclusions and remedies must remain project-specific.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0fda8d85 auto-h2 elementor-widget elementor-widget-heading\" data-id=\"0fda8d85\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">h2: MegSolid Supply Boundary for an Availability Guarantee<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6bf7ea3c auto-p elementor-widget elementor-widget-heading\" data-id=\"6bf7ea3c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Subject to the agreed supply and service scope, MegSolid may support Energon model selection, system architecture, BOM traceability, PCS\/BMS\/EMS interface definition, controlled documentation, FAT records, SCADA data mapping and project-specific acceptance planning. Availability responsibility for owner- or EPC-supplied transformers, switchgear, meters, site SCADA, communications and auxiliary power must be allocated separately. The <strong><a href=\"https:\/\/www.solidess.com\/why-more-epcs-are-choosing\/\" target=\"_blank\" style=\"color:#61ce70\">engineering-transparency guide for EPCs<\/a><\/strong> explains why evidence boundaries are more useful than unsupported marketing claims. A <strong>BESS availability guarantee<\/strong> remains a negotiated project obligation; MegSolid does not publish one percentage that automatically applies to every cabinet, climate, grid, dispatch profile or service contract.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4f4447cd elementor-widget-mobile__width-inherit auto-list elementor-icon-list--layout-traditional elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"4f4447cd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"><strong>Send the service requirement:<\/strong> required charge\/discharge power, energy duration, kvar duty, response time and operating calendar.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"><strong>Send the electrical boundary:<\/strong> voltage, frequency, SLD, transformer, switchgear, PCC and metering arrangement.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"><strong>Send the site envelope:<\/strong> ambient conditions, altitude, enclosure constraints and auxiliary-power availability.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"><strong>Send the control boundary:<\/strong> EMS owner, dispatch source, SCADA protocol, cybersecurity constraints and fallback requirements.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"><strong>Send the commercial draft:<\/strong> proposed eligible hours, exclusions, maintenance allowance, reporting period and remedy concept.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"><strong>Request the deliverable:<\/strong> a marked-up Availability Definition Schedule showing confirmed, conditional and project-specific fields.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-71ff3e23 elementor-tablet-align-center elementor-align-center auto-cta elementor-widget elementor-widget-button\" data-id=\"71ff3e23\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6Ijk0OCIsInRvZ2dsZSI6ZmFsc2V9\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Request a BESS Availability Definition Schedule \u2014 sfhq2008@gmail.com<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-cb29f1a3 auto-faq e-flex e-con-boxed e-con e-child\" data-id=\"cb29f1a3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-caaf2c15 elementor-widget elementor-widget-heading\" data-id=\"caaf2c15\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">FAQ<\/h2>\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-94288086 e-con-full e-flex e-con e-child\" data-id=\"94288086\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fb282019 elementor-widget elementor-widget-n-accordion\" data-id=\"fb282019\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;default_state&quot;:&quot;all_collapsed&quot;,&quot;max_items_expended&quot;:&quot;one&quot;,&quot;n_accordion_animation_duration&quot;:{&quot;unit&quot;:&quot;ms&quot;,&quot;size&quot;:400,&quot;sizes&quot;:[]}}\" data-widget_type=\"nested-accordion.default\">\n\t\t\t\t\t\t\t<div class=\"e-n-accordion\" aria-label=\"Accordion. Open links with Enter or Space, close with Escape, and navigate with Arrow Keys\">\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-4210\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"1\" tabindex=\"0\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-4210\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> What is a BESS availability guarantee? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-4210\" class=\"elementor-element elementor-element-2e05832e e-con-full e-flex e-con e-child\" data-id=\"2e05832e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-4210\" class=\"elementor-element elementor-element-9867731d e-con-full e-flex e-con e-child\" data-id=\"9867731d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-506a928f elementor-widget elementor-widget-heading\" data-id=\"506a928f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">A BESS availability guarantee defines the percentage of eligible time during which the system can deliver a stated contract capability at an agreed measurement boundary. It must identify the service, formula, eligible hours, partial-derating method, exclusions, data sources, event timestamps and remedies. It is not the same as an equipment-online indication or a battery warranty.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-4211\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"2\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-4211\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Is BESS uptime the same as availability? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-4211\" class=\"elementor-element elementor-element-35558a92 e-con-full e-flex e-con e-child\" data-id=\"35558a92\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-4211\" class=\"elementor-element elementor-element-baa00248 e-con-full e-flex e-con e-child\" data-id=\"baa00248\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7c0e4a3d elementor-widget elementor-widget-heading\" data-id=\"7c0e4a3d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">No. Uptime may show that equipment or controls are energized, while contractual availability asks whether the BESS can perform the required service. A system can be online but power-limited, energy-limited, unable to accept remote dispatch or unable to sustain the required duration. The contract must define the capability test rather than relying on status alone.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-4212\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"3\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-4212\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> How is BESS availability calculated? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-4212\" class=\"elementor-element elementor-element-1e51d624 e-con-full e-flex e-con e-child\" data-id=\"1e51d624\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-4212\" class=\"elementor-element elementor-element-8b420635 e-con-full e-flex e-con e-child\" data-id=\"8b420635\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-81eb5185 elementor-widget elementor-widget-heading\" data-id=\"81eb5185\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">A simple method is eligible hours minus unavailable hours, divided by eligible hours. A capacity-weighted method uses A\u209b = [\u03a3(\u0394t\u1d62 \u00d7 q\u209b,\u1d62) \u00f7 \u03a3\u0394t\u1d62] \u00d7 100%, where q is verified available service capability divided by required capability at the contract point, limited to 0\u20131. The service, exclusions and interval rules must be fixed first.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-4213\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"4\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-4213\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> How should partial BESS derating be counted? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-4213\" class=\"elementor-element elementor-element-97c37951 e-con-full e-flex e-con e-child\" data-id=\"97c37951\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-4213\" class=\"elementor-element elementor-element-c37038e1 e-con-full e-flex e-con e-child\" data-id=\"c37038e1\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-19c0c37d elementor-widget elementor-widget-heading\" data-id=\"19c0c37d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Partial derating should normally be counted in proportion to the service-specific capability that remains, if the contract adopts capacity weighting. For example, an interval with 75% of the required discharge capability may contribute q = 0.75. Shared transformers, switchgear, auxiliaries and control functions must be considered because a single common fault can remove the remaining blocks.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-4214\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"5\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-4214\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Should planned maintenance be excluded from availability? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-4214\" class=\"elementor-element elementor-element-b39ad6fd e-con-full e-flex e-con e-child\" data-id=\"b39ad6fd\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-4214\" class=\"elementor-element elementor-element-3e422e9f e-con-full e-flex e-con e-child\" data-id=\"3e422e9f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-dfdbbfcd elementor-widget elementor-widget-heading\" data-id=\"dfdbbfcd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">The contract must choose the economic treatment. Maintenance outside the service obligation can be removed from numerator and denominator; a deemed-excused interval may instead remain in the denominator with q = 1.00. In either case, define advance notice, approved timing, annual or seasonal allowance, work scope and evidence. Unlimited self-declared maintenance can make the guarantee meaningless.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-4215\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"6\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-4215\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Is a utility grid outage always an excused event? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-4215\" class=\"elementor-element elementor-element-979e0bb9 e-con-full e-flex e-con e-child\" data-id=\"979e0bb9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-4215\" class=\"elementor-element elementor-element-976c6ae7 e-con-full e-flex e-con e-child\" data-id=\"976c6ae7\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b01e3966 elementor-widget elementor-widget-heading\" data-id=\"b01e3966\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Not automatically. The agreement should require evidence of PCC voltage, breaker state, utility notice and the BESS condition. It should also state whether readiness can be demonstrated while the grid is unavailable. If the BESS itself cannot perform for an independent equipment reason, the grid outage should not hide that failure without an agreed causation rule.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-4216\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"7\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-4216\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Does an EMS communication failure make the BESS unavailable? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-4216\" class=\"elementor-element elementor-element-f646f5ca e-con-full e-flex e-con e-child\" data-id=\"f646f5ca\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-4216\" class=\"elementor-element elementor-element-8552820a e-con-full e-flex e-con e-child\" data-id=\"8552820a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-47752c95 elementor-widget elementor-widget-heading\" data-id=\"47752c95\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">It depends on the contracted service and ownership boundary. A remote-dispatch service may be unavailable even if local protection and power conversion remain healthy. If the failed network is owner-supplied, the contract may allocate the interval differently. Gateway, EMS, PCS and local-controller logs are needed to identify the source and service impact.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-4217\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"8\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-4217\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Can low SOC be used as a BESS availability exclusion? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-4217\" class=\"elementor-element elementor-element-da8ac044 e-con-full e-flex e-con e-child\" data-id=\"da8ac044\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-4217\" class=\"elementor-element elementor-element-a42c842c e-con-full e-flex e-con e-child\" data-id=\"a42c842c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-81fdc1be elementor-widget elementor-widget-heading\" data-id=\"81fdc1be\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Only under a defined operating-responsibility rule. The parties must determine who controlled dispatch, charge opportunity, reserve SOC and operating restrictions before the event. Low SOC caused by an owner instruction may be treated differently from low SOC caused by battery, charger, auxiliary or control limitations. Time-aligned commands and energy records are required.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-4218\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"9\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-4218\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> What data are required to verify BESS availability? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-4218\" class=\"elementor-element elementor-element-77258db0 e-con-full e-flex e-con e-child\" data-id=\"77258db0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-4218\" class=\"elementor-element elementor-element-c11fc8e3 e-con-full e-flex e-con e-child\" data-id=\"c11fc8e3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-823bfd08 elementor-widget elementor-widget-heading\" data-id=\"823bfd08\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">The minimum evidence normally includes dispatch instruction, revenue-meter response, available power or energy limits, SOC, operating mode, grid and breaker status, first-out alarms, maintenance records and recovery test. Define raw UTC timestamps, NTP\/PTP source, allowed drift, units, sign convention, quality flags, sampling and settlement granularity, source priority, retention, access and missing-data reconstruction.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-4219\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"10\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-4219\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> When does a BESS availability event end? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-4219\" class=\"elementor-element elementor-element-f1ec5f9e e-con-full e-flex e-con e-child\" data-id=\"f1ec5f9e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-4219\" class=\"elementor-element elementor-element-dd56247c e-con-full e-flex e-con e-child\" data-id=\"dd56247c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-631ede4f elementor-widget elementor-widget-heading\" data-id=\"631ede4f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">The event ends after the contracted service is restored at the measurement point, active limits are cleared or accepted, and a valid command or functional test produces a meter-confirmed response for the agreed stabilization period. Alarm reset alone is insufficient. A recurrence from the same unresolved cause within the continuity window should remain part of the same event.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-42110\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"11\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-42110\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> What should an EPC include in a BESS availability RFQ? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-42110\" class=\"elementor-element elementor-element-321d0157 e-con-full e-flex e-con e-child\" data-id=\"321d0157\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-42110\" class=\"elementor-element elementor-element-44fa647c e-con-full e-flex e-con e-child\" data-id=\"44fa647c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7a3c26d2 elementor-widget elementor-widget-heading\" data-id=\"7a3c26d2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Include the contracted service, kW\/kVA\/kvar\/kWh baseline, delivery point, eligible calendar, formula, partial-capacity treatment, exclusions, maintenance allowance, data ownership, SCADA points, event notice, recovery test and remedy ladder. Ask every bidder to complete the same schedule so percentages can be compared on one boundary.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-42111\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"12\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-42111\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> What is the clearest GEO-ready definition of BESS availability? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-42111\" class=\"elementor-element elementor-element-b8be71f9 e-con-full e-flex e-con e-child\" data-id=\"b8be71f9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-42111\" class=\"elementor-element elementor-element-7c5c0e4c e-con-full e-flex e-con e-child\" data-id=\"7c5c0e4c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-992343f5 elementor-widget elementor-widget-heading\" data-id=\"992343f5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">BESS availability is the share of eligible operating time during which a battery energy storage system can deliver its agreed service capability at the contract measurement point, after applying defined partial-derating weights and approved exclusions. The definition must be supported by time-aligned dispatch, meter, SCADA, alarm and recovery evidence.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-42112\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"13\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-42112\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Can MegSolid promise one fixed availability percentage before receiving project data? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-42112\" class=\"elementor-element elementor-element-0f1a19ee e-con-full e-flex e-con e-child\" data-id=\"0f1a19ee\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-42112\" class=\"elementor-element elementor-element-6fd88ee2 e-con-full e-flex e-con e-child\" data-id=\"6fd88ee2\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8c27c737 elementor-widget elementor-widget-heading\" data-id=\"8c27c737\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">No universal percentage should be assumed. MegSolid must first review the service duty, system architecture, site environment, operating calendar, measurement point, EMS and grid boundaries, maintenance responsibility, exclusion rules and remedies. A project-specific availability schedule can then separate confirmed capability, conditional assumptions and commercial terms requiring agreement.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Define BESS availability using eligible hours, partial-capacity weighting, excused events, time-aligned evidence and a project-specific remedy ladder.<\/p>","protected":false},"author":4,"featured_media":4713,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_joinchat":[],"footnotes":""},"categories":[27,1],"tags":[311,309,310,316,142,313,36,312,315,314],"class_list":["post-4716","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","category-bess","tag-availability-calculation","tag-bess-availability-guarantee","tag-bess-contract","tag-ci-bess","tag-epc-procurement","tag-excused-hours","tag-MegSolid","tag-partial-derating","tag-performance-guarantee","tag-scada-evidence"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.solidess.com\/xh\/wp-json\/wp\/v2\/posts\/4716","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.solidess.com\/xh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.solidess.com\/xh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.solidess.com\/xh\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.solidess.com\/xh\/wp-json\/wp\/v2\/comments?post=4716"}],"version-history":[{"count":6,"href":"https:\/\/www.solidess.com\/xh\/wp-json\/wp\/v2\/posts\/4716\/revisions"}],"predecessor-version":[{"id":4722,"href":"https:\/\/www.solidess.com\/xh\/wp-json\/wp\/v2\/posts\/4716\/revisions\/4722"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.solidess.com\/xh\/wp-json\/wp\/v2\/media\/4713"}],"wp:attachment":[{"href":"https:\/\/www.solidess.com\/xh\/wp-json\/wp\/v2\/media?parent=4716"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.solidess.com\/xh\/wp-json\/wp\/v2\/categories?post=4716"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.solidess.com\/xh\/wp-json\/wp\/v2\/tags?post=4716"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}