{"id":5467,"date":"2026-09-20T09:39:38","date_gmt":"2026-09-20T01:39:38","guid":{"rendered":"https:\/\/www.solidess.com\/?p=5467"},"modified":"2026-11-09T16:24:49","modified_gmt":"2026-11-09T08:24:49","slug":"%d9%86%d8%b8%d8%a7%d9%85-%d8%aa%d8%ae%d8%b2%d9%8a%d9%86-%d8%a7%d9%84%d8%b7%d8%a7%d9%82%d8%a9-%d8%a8%d8%a7%d9%84%d8%a8%d8%b7%d8%a7%d8%b1%d9%8a%d8%a7%d8%aa-%d9%81%d9%8a-%d9%85%d8%a7%d9%84%d9%8a%d8%b2","status":"publish","type":"post","link":"https:\/\/www.solidess.com\/ar\/battery-energy-storage-system-malaysia-261kwh-bess\/","title":{"rendered":"\u0646\u0638\u0627\u0645 \u062a\u062e\u0632\u064a\u0646 \u0627\u0644\u0637\u0627\u0642\u0629 \u0628\u0627\u0644\u0628\u0637\u0627\u0631\u064a\u0627\u062a \u0641\u064a \u0645\u0627\u0644\u064a\u0632\u064a\u0627: \u0633\u0639\u0629 261 \u0643\u064a\u0644\u0648\u0648\u0627\u0637\/\u0633\u0627\u0639\u0629 \u0644\u062a\u063a\u0637\u064a\u0629 \u0630\u0631\u0648\u0629 \u0627\u0633\u062a\u0647\u0644\u0627\u0643 TNB \u0627\u0644\u0628\u0627\u0644\u063a\u0629 90 \u0643\u064a\u0644\u0648\u0648\u0627\u0637"},"content":{"rendered":"\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"MegSolid\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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For a TNB-supplied factory in Peninsular Malaysia, start with the required reduction at the billing meter. This guide uses a hypothetical 390 kW load, a 300 kW import target and a two-hour event: the battery must deliver 90 kW and 180 kWh AC. MegSolid Energon 261<\/a> is a 125 kVA \/ 261.24 kWh candidate to compare with the 215.04 kWh unit<\/a>. The numbers below are a screening example, not a Malaysian MegSolid installation or a runtime guarantee. Use the C&I BESS design process<\/a> to verify PCS kW\/kvar, usable AC energy and recharge before ordering.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Screen Energon 261 for an 80\u2013100 kW Two-Hour Demand Reduction<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Delivering 90 kW for two hours requires 180 kWh AC. The screening assumptions below add an independent delivery allowance and a scheduled SOC window. Under those assumptions, one 215.04 kWh cabinet falls short, while 261.24 kWh clears the nominal-energy screen. Actual acceptance still depends on guaranteed usable AC energy at the required power and warranty age.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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The Energon 261.24 kWh product page<\/a> lists 125 kVA, an IP54 cabinet, 400\/480 V AC options and liquid cooling. Its published operating range is \u221220 to 55\u00b0C, with derating above 45\u00b0C. Confirm continuous kW, the simultaneous kvar obligation, temperature\/DC-voltage limits and net usable AC energy for the exact offered build. The nameplate makes it a candidate; it does not establish the two-hour guarantee. If the Malaysian shortlist includes a Sungrow PowerStack 255CS (ST255CS-2H) alternative<\/a><\/strong>, apply the same 90 kW \/ 180 kWh duty and confirm each cabinet\u2019s active-power and usable-energy limits.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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MegSolid option<\/th>Published rating<\/th>Result for a 90 kW, two-hour peak<\/th><\/tr><\/thead>
ESSA0100B-0215<\/td>100 kW \/ 215.04 kWh<\/td>100 kW is a published rating; the common illustrative energy factors give 170.3 kWh AC, below the 180 kWh target<\/td><\/tr>
Energon 261<\/td>125 kVA \/ 261.24 kWh<\/td>Nominal energy clears the stated illustrative screen; available kW\/kvar and warranted AC energy remain approval gates<\/td><\/tr>
2 \u00d7 ESSA0100B-0215<\/td>200 kW \/ 430.08 kWh<\/td>430.08 kWh nominal; compare the additional capacity, two branches and released parallel-control scope against the actual duty<\/td><\/tr>
ESSC0500B-1075<\/td>500 kW \/ 1.0752 MWh<\/td>Consider only when measured power\/energy and the site electrical\/civil scope justify the larger block<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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Compare the Installed Cabinet Footprints<\/h3>\t\t\t\t<\/div>\n\t\t\t\t
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Energon measures 1,300 \u00d7 1,350 \u00d7 2,200 mm, giving a 1.76 m\u00b2 equipment footprint before service clearances. One ESSA0100B-0215 occupies about 3.80 m\u00b2 from its 2,450 \u00d7 1,550 mm base, while two occupy about 7.60 m\u00b2.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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On cabinet dimensions alone, 1.755 m\u00b2 is approximately 76.9% less than the combined 7.595 m\u00b2 base area of two ESSA cabinets. This is a geometric comparison, not a 76.9% saving in installed site area or cost. Service access, fire separation, cooling-air paths and the approved parallel arrangement determine the actual layout.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Shorter peaks, lower power factor or an energy requirement beyond one cabinet can change the product selection. TNB billing windows and site interval data establish those boundaries.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Check Whether TNB Bills the Peak the Battery Will Remove<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Confirm the tariff name, supply-voltage category, billing period and demand-related line items on the actual TNB invoice. A low-voltage customer\u2019s charges must not be treated as an MV\/HV maximum-demand charge merely because its plant has a high instantaneous load. Use the current approved tariff and account terms; older industrial tariff labels and historical booklets can describe a different structure.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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For eligible TNB ToU accounts, the published weekday peak window is 14:00\u201322:00; other weekday hours, weekends and TNB\u2019s specified public holidays are off-peak. TNB explains that maximum-demand charges do not apply during off-peak periods for peak\/off-peak tariff customers. Verify the site\u2019s actual MV\/HV demand-charge basis before assigning a saving to a recorded event.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Site tariff position<\/th>Peak that matters to the purchase<\/th>BESS operating result<\/th><\/tr><\/thead>
Eligible MV\/HV general tariff<\/td>Highest demand that reaches the billed maximum-demand line<\/td>Discharge against the recurring billed interval<\/td><\/tr>
Eligible MV\/HV ToU account<\/td>Chargeable 14:00\u201322:00 weekday event, excluding TNB-specified off-peak holidays<\/td>Schedule sufficient usable energy before the event and verify the entire chargeable interval<\/td><\/tr>
Peak occurs only during ToU off-peak hours<\/td>Check the actual account terms; an off-peak event does not create the same ToU demand saving<\/td>Avoid buying battery capacity for a saving the tariff does not create<\/td><\/tr>
Peak moves between production shifts<\/td>Different event may set the next bill<\/td>Control every qualifying event across the billing period<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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Use Repeated 30-Minute Demand Blocks to Define the Duty<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Review twelve billing months where available, with a data-gap plan if records are shorter. Export local timestamps, interval duration, import kWh or average kW, measured kvar\/power factor, production shift, PV output and outage flags. TNB defines monthly MD from the largest energy supplied in a consecutive 30-minute period. Reconcile the controller\u2019s clock and interval convention with the revenue meter rather than assuming any four logged half-hours exactly match the billing calculation.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Recorded event above a 300 kW target<\/th>Required BESS power<\/th>AC energy to remove the event<\/th>Initial MegSolid direction<\/th><\/tr><\/thead>
One interval at 390 kW<\/td>90 kW<\/td>45 kWh<\/td>ESSA energy range<\/td><\/tr>
Four intervals at 390 kW<\/td>90 kW<\/td>180 kWh<\/td>Energon 261 energy range<\/td><\/tr>
Eight intervals at 340 kW<\/td>40 kW<\/td>160 kWh<\/td>Lower PCS power with a longer energy window<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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The highest interval sets the monthly maximum. The intervals around it establish how many kWh the battery needs. Repeated events also establish how often the cabinet must cycle and how much time remains for recharge. The PCC peak-shaving controller<\/a><\/strong> must prevent charging from creating a new billed maximum after the original peak has been reduced.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Set the PCS Requirement from kW and Power Factor<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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The billing target establishes a 90 kW active-power reduction. Size the PCS from the active and reactive power it is assigned to exchange at its own terminals. The factory\u2019s load power factor does not automatically become the PCS output power factor: the grid, capacitors or other equipment may supply part of the kvar duty. Agree the control mode and P\u2013Q allocation before calculating kVA.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Required active-power reduction = 390 \u2212 300 = 90 kW
PCS apparent power = \u221a(P\u00b2 + Q\u00b2)
At Q = 0: S = 90 kVA
If PCS displacement PF is specified as 0.90: S = 90 \u00f7 0.90 = 100 kVA, with |Q| \u2248 43.6 kvar<\/code><\/p>\t\t\t\t<\/div>\n\t\t\t\t

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The following table is a sensitivity check for the PCS\u2019s assigned displacement power factor at 90 kW. It is not a conversion from the factory\u2019s measured power factor. The arithmetic difference from 125 kVA is not spare kvar capability or proof of continuous kW output; apply the exact model\u2019s P\u2013Q, current, temperature and DC-voltage limits.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Assigned PCS displacement PF<\/th>PCS kVA at 90 kW<\/th>Arithmetic difference from 125 kVA<\/th><\/tr><\/thead>
0.95<\/td>94.7 kVA<\/td>30.3 kVA<\/td><\/tr>
0.90<\/td>100.0 kVA<\/td>25.0 kVA<\/td><\/tr>
0.80<\/td>112.5 kVA<\/td>12.5 kVA<\/td><\/tr>
0.75<\/td>120.0 kVA<\/td>5.0 kVA<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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For an ideal 125 kVA circle at 90 kW, \u221a(125\u00b2 \u2212 90\u00b2) is approximately 86.7 kvar. This is a geometric upper screen, not a model guarantee; the released P\u2013Q curve can impose tighter limits. Verify simultaneous P and Q, current and harmonic performance through commercial BESS power-quality testing<\/a><\/strong>.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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CT direction can invalidate the dispatch calculation. Reversed CT polarity or a misplaced PCC measurement can command charging during a peak or discharging after the event has passed.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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The CT polarity commissioning test<\/a><\/strong> verifies that the controller sees import and export in the same direction as the revenue meter.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Size Battery Energy from Peak Duration and Protected SOC<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Power determines how far the demand falls; duration determines whether the cabinet can hold the target until the event ends. Four consecutive 30-minute intervals at a 90 kW reduction require 180 kWh at the AC connection:<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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AC energy required = 90 kW \u00d7 2 hours = 180 kWh<\/code><\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Use 88% as an independent illustrative one-way AC-delivery factor and 90% as an illustrative scheduled SOC window. Neither is a warranted value for these cabinets. The product page\u2019s \u201cmaximum system efficiency: 90%\u201d does not define a measured round-trip efficiency or establish the 88% factor. The screen below also assumes beginning-of-life nominal capacity; auxiliaries must be assigned to the delivery boundary once.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Required nominal energy = 180 kWh \u00f7 0.88 \u00f7 0.90
= 227.3 kWh<\/code><\/p>\t\t\t\t<\/div>\n\t\t\t\t

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The unrounded requirement is 227.27 kWh: 12.2 kWh above 215.04 kWh and 34.0 kWh below 261.24 kWh. The next table applies the same hypothetical factors solely to show their effect on nominal energy; it is not a measured comparison or a product acceptance certificate.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Product<\/th>Nominal energy<\/th>Illustrative AC energy: nominal \u00d7 0.90 \u00d7 0.88<\/th>Illustrative duration at 90 kW, before uncounted auxiliaries\/age effects<\/th><\/tr><\/thead>
ESSA0100B-0215<\/td>215.04 kWh<\/td>170.3 kWh AC<\/td>1.89 hours<\/td><\/tr>
Energon 261<\/td>261.24 kWh<\/td>206.9 kWh AC<\/td>2.30 hours<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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In this beginning-of-life illustration, Energon\u2019s calculated AC allowance is 206.9 \u2212 180 = 26.9 kWh. Any additional auxiliary demand or capacity loss reduces it. At an independently assumed 80% retained capacity, the same other factors give only 165.5 kWh AC, below the two-hour target. Specify the required usable AC energy and warranty-age condition rather than purchasing against the initial 26.9 kWh allowance.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Long-term sizing still needs the project degradation model and guaranteed-energy schedule. The commercial BESS capacity test<\/a><\/strong> verifies delivered AC energy at the agreed power, SOC limits and ambient condition.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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A 90-minute event at 90 kW needs 135 kWh AC, or 170.5 kWh nominal under these same hypothetical factors. That clears the 215.04 kWh nominal-energy screen, but continuous kW\/kvar, temperature, auxiliaries and warranty age still require approval. A longer measured event can change the shortlist without proving either product is always the cheaper purchase.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Match the Demand Block to ESSA, Energon or ESSC<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Compare ESSA, Energon and ESSC against the same meter-level duty and acceptance boundary. The current catalogue ratings place them in different power\/energy classes; they do not rank the installed cost or guarantee the same usable fraction. Shortlist a class first, then require the selected model to meet the specified kW\/kvar and net AC-energy obligation.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Measured duty<\/th>Preliminary MegSolid candidate<\/th>Published product advantage<\/th>Release condition<\/th><\/tr><\/thead>
Up to 100 kW with calculated nameplate energy at or below 215.04 kWh<\/td>ESSA0100B-0215<\/a><\/strong><\/td>100 kW, 215.04 kWh, 400 V, built-in isolation transformer, on-grid THDi <3%<\/td>Confirm net usable AC energy and simultaneous kW\/kvar at temperature and warranty age<\/td><\/tr>
Approximately 80\u2013100 kW for close to two hours<\/td>Energon 261<\/a><\/strong><\/td>125 kVA, 261.24 kWh, 400\/480 V, liquid cooling, up to 10 units in parallel<\/td>Require the exact build to meet 90 kW \/ 180 kWh AC; parallel expansion needs an approved design<\/td><\/tr>
Several hundred kilowatts with an energy requirement approaching 1 MWh<\/td>ESSC0500B-1075<\/a><\/strong><\/td>500 kW, 1.0752 MWh, IP54, 6,058 \u00d7 2,438 \u00d7 2,896 mm<\/td>Compare transformer, protection, usable AC energy, civil works and delivery scope<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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When the Container-Class Screen Applies<\/h3>\t\t\t\t<\/div>\n\t\t\t\t
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A separate hypothetical 350 kW reduction for two hours needs 700 kWh AC. Applying the same 88% delivery factor and 90% scheduled SOC window gives 883.8 kWh nominal, below the ESSC0500B-1075\u2019s published 1,075.2 kWh. This is an initial energy screen only; verify available kW\/kvar, thermal limits, auxiliaries and warranted AC energy before releasing a container configuration.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Its 21,000 kg weight and container dimensions then become transformer, switchboard, foundation and delivery-route decisions.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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For the 90 kW \/ 180 kWh example, Energon merits a single-cabinet review before a 500 kW container. ESSC\u2019s 1,075.2 kWh is approximately 814.0 kWh more nominal energy than Energon, but 500 kW cannot be compared directly with a 125 kVA rating to calculate unused active power. Price the complete accepted duty and site works before deciding which architecture offers better value.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tReview My 90 kW TNB Peak<\/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
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Keep Energon Ready for the Chargeable TNB Window<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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The two-hour event can be controlled only if the required energy remains available when the chargeable window begins. Under the current TNB ToU schedule, a medium- or high-voltage factory can prepare the battery before 14:00, protect the required SOC through the weekday peak window and recharge after 22:00. Weekend operation can use the all-day off-peak period when production permits.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Control priority for the 90 kW site should follow this order:<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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