{"id":4988,"date":"2026-08-27T16:48:38","date_gmt":"2026-08-27T08:48:38","guid":{"rendered":"https:\/\/www.solidess.com\/?p=4988"},"modified":"2026-08-27T16:48:38","modified_gmt":"2026-08-27T08:48:38","slug":"supernode-stage-3-bess-sizing","status":"publish","type":"post","link":"https:\/\/www.solidess.com\/ar\/supernode-stage-3-bess-sizing\/","title":{"rendered":"Supernode Stage 3 BESS sizing: Converting 260MW \/ 1,216MWh into an equipment architecture"},"content":{"rendered":"
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Supernode Stage 3 is a clean sizing stress test for Australian buyers. Public figures put it at 260MW \/ 1,216MWh<\/strong>. MegSolid\u2019s standard 5000INTL container lists 2.7MW \/ 5,015.9kWh<\/strong>.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Divide both ways and the counts refuse to match. Power-first needs 97<\/strong> standard 5000INTL units. Energy-first needs 243<\/strong>.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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That gap is the point. Split the job into four boundaries before you buy boxes: POI power, delivered energy, installed battery energy and PCS capacity. Then decide whether a standard integrated block fits, whether its AC side would sit idle, or whether the plant needs a different DC\/AC layout.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"Supernode\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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Fast-scan sizing result<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Decision input<\/th>Published or calculated value<\/th>\u0645\u0639\u0646\u0649 \u0645\u0635\u0637\u0644\u062d \u00ab\u0627\u0644\u0645\u0634\u062a\u0631\u064a\u0627\u062a\u00bb<\/th><\/tr><\/thead>
Supernode Stage 3 power<\/td>260MW<\/td>Project-level AC delivery rating reported by GE Vernova<\/td><\/tr>
Supernode Stage 3 energy<\/td>1,216MWh<\/td>Published Stage 3 energy; public releases do not define every measurement boundary<\/td><\/tr>
Nameplate energy-to-power ratio<\/td>4.68 hours<\/td>More energy than a pure 260MW \u00d7 4h block<\/td><\/tr>
Exact four-hour delivery energy<\/td>1,040MWh<\/td>Energy if 260MW is held for exactly four hours<\/td><\/tr>
Published energy above 1,040MWh<\/td>176MWh<\/td>Possible margin; allocation needs contract and design evidence<\/td><\/tr>
5000INTL standard rating<\/td>2.7MW \/ 5.0159MWh<\/td>About 1.86 hours at nameplate power<\/td><\/tr>
Power-first 5000INTL count<\/td>97 units<\/td>About 260MW, only about 486.5MWh of nameplate energy<\/td><\/tr>
Energy-first 5000INTL count<\/td>243 units<\/td>About 1,218.9MWh, 656.1MW of listed aggregate AC power<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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This is a pre-FEED screen. It is not a Supernode equipment bid. Supernode chose CATL battery systems and GE Vernova for power conversion, plant controls, integration and grid-connection support.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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What Supernode Stage 3 has publicly confirmed<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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GE Vernova\u2019s 21 August 2026 release rates Stage 3 at 260MW \/ 1,216MWh<\/strong> and calls it four-hour storage. The same note puts the finished three-stage campus at 780MW \/ 3,075MWh<\/strong> at Brendale.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Stage 3 has Generator Performance Standards acceptance. GE Vernova supplies PCS, plant controls, integration and grid-connection support, and calls Stage 3 its first grid-forming BESS project in Australia. That is GE Vernova\u2019s Australian record. It is not a claim that this is the first grid-forming battery in the country.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Primary source for Stage 3 power, energy, GPS and grid-forming wording: GE Vernova announcement<\/a>.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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\u0627\u0644\u0640 Quinbrook Stage 2 note<\/a> puts Stages 1 and 2 in operation at 520MW \/ 1,858MWh<\/strong>. Stage 3 closed about AU$469 million<\/strong> of debt and carries a 15-year offtake with Stanwell.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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CATL\u2019s Supernode note<\/a> says EnerC Plus went into Stages 1 and 2 and TENER S into Stage 3, under a long-term service arrangement. CATL lists the three-stage total as 780MW \/ 3,074MWh<\/strong> \u2014 one MWh under the GE Vernova figure.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Source<\/th>Current published total<\/th>How to use it<\/th><\/tr><\/thead>
GE Vernova, 21 August 2026<\/td>780MW \/ 3,075MWh<\/td>PCS, controls, GPS, grid-forming scope<\/td><\/tr>
CATL, 14 August 2026<\/td>780MW \/ 3,074MWh<\/td>Battery supply and lifecycle service<\/td><\/tr>
Quinbrook, 28 July 2026<\/td>Stage 1+2: 520MW \/ 1,858MWh<\/td>Operating status, financing, offtake<\/td><\/tr>
Supernode project page<\/td>760MW \/ 3,096MWh<\/td>Older snapshot; keep the page date and do not mix totals<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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\u0627\u0644\u0640 Supernode project page<\/a> also says the site ties to the regional transmission grid at 275kV<\/strong>. Its line that 80% of Queensland electricity flows through South Pine each day stays attributed to that site.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Start with the delivery obligation, then look at battery nameplates<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Contract or grid-connection obligations come first. Container count comes later.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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For a four-hour duty at 260MW:<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Required delivered energy = 260MW \u00d7 4h = 1,040MWh<\/strong><\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Stage 3 publishes 1,216MWh. The gap is 176MWh, about 16.9% above a pure four-hour multiply.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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That margin might cover usable SOC, conversion losses, auxiliaries, degradation allowance, reserve policy or something else the project locked in. Public notes do not split the 176MWh. You need the technical schedule, offtake and approved design for that split.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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So the 4.68-hour nameplate ratio is not a 4.68-hour guaranteed export duration.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Four energy boundaries stay separate<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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\u0627\u0644\u062d\u062f\u0648\u062f<\/th>Question<\/th>Evidence<\/th><\/tr><\/thead>
Installed DC nameplate<\/td>How much battery energy is physically installed?<\/td>Container datasheets, rack schedules, as-built serials<\/td><\/tr>
Usable DC energy<\/td>How much sits inside the allowed SOC window?<\/td>BMS limits, temperature limits, SOH basis, warranty schedule<\/td><\/tr>
AC energy at the PCS<\/td>What remains after battery and conversion losses?<\/td>Defined efficiency test, PCS loss data, auxiliary treatment<\/td><\/tr>
Delivered energy at the POI<\/td>What hits the contractual meter?<\/td>Revenue meters, transformer losses, collection losses, test records<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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A workable screen:<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Delivered POI energy = installed DC energy \u00d7 usable SOC fraction \u00d7 retained-capacity factor \u00d7 discharge-path efficiency \u2212 interval auxiliaries<\/strong><\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Each term needs its own boundary. One product-page efficiency number will not close the sum.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Where the package ends: container, transformer and grid-connection responsibilities<\/a><\/strong>.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Why one 5000INTL ratio produces two container counts<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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MegSolid\u2019s 5000INTL page publishes this standard setup:<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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\u0627\u0644\u0645\u0639\u0644\u0645\u0629 \u0627\u0644\u0645\u0646\u0634\u0648\u0631\u0629<\/th>\u0627\u0644\u0642\u064a\u0645\u0629 5000INTL<\/th><\/tr><\/thead>
\u0627\u0644\u0637\u0627\u0642\u0629 \u0627\u0644\u0645\u0642\u062f\u0631\u0629<\/td>5,015.9kWh<\/td><\/tr>
\u0627\u0644\u0642\u062f\u0631\u0629 \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0626\u064a\u0629 \u0627\u0644\u0645\u0642\u0646\u0646\u0629 \u0627\u0644\u062a\u064a \u062a\u0639\u0645\u0644 \u0628\u0627\u0644\u062a\u064a\u0627\u0631 \u0627\u0644\u0645\u062a\u0631\u062f\u062f<\/td>450kW \u00d7 6 = 2.7MW<\/td><\/tr>
Nameplate duration<\/td>About 1.86 hours<\/td><\/tr>
Nominal DC voltage<\/td>1,331.2Vdc<\/td><\/tr>
Operating DC range<\/td>1,123.2\u20131,497.6Vdc<\/td><\/tr>
\u0627\u0644\u062c\u0647\u062f \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0626\u064a \u0627\u0644\u0645\u062a\u0631\u062f\u062f \u0627\u0644\u0645\u0642\u0646\u0646<\/td>690Vac<\/td><\/tr>
\u062a\u0628\u0631\u064a\u062f<\/td>\u0646\u0638\u0627\u0645 \u0627\u0644\u062a\u0628\u0631\u064a\u062f \u0627\u0644\u0633\u0627\u0626\u0644 \u0627\u0644\u0630\u0643\u064a<\/td><\/tr>
Protection<\/td>\u0622\u064a \u0628\u064a \u0665\u0665<\/td><\/tr>
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\u221230\u00b0C to 55\u00b0C<\/td><\/tr>
\u0627\u0644\u0627\u062a\u0635\u0627\u0644\u0627\u062a<\/td>\u0625\u064a\u062b\u0631\u0646\u062a \u0648 RS485<\/td><\/tr>
\u0623\u0642\u0635\u0649 \u0643\u0641\u0627\u0621\u0629<\/td>87.5% (confirm measurement boundary)<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\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\tSend MegSolid your MW, delivered MWh, POI voltage and contract-year requirement for an initial sizing check.<\/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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Full sheet: MegSolid 5000INTL product page<\/a><\/strong>.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Power-first calculation<\/h3>\t\t\t\t<\/div>\n\t\t\t\t
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260MW \u00f7 2.7MW per unit = 96.3 units<\/strong><\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Round up to 97<\/strong> standard units. Combined nameplate energy:<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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97 \u00d7 5.0159MWh = 486.5MWh<\/strong><\/p>\t\t\t\t<\/div>\n\t\t\t\t

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At a 260MW plant limit that is about 1.87 hours before usable-energy cuts. Power is covered at nameplate level. The four-hour energy duty is not.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Energy-first calculation<\/h3>\t\t\t\t<\/div>\n\t\t\t\t
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1,216MWh \u00f7 5.0159MWh per unit = 242.4 units<\/strong><\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Round up to 243<\/strong> standard units. Listed aggregate AC power:<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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243 \u00d7 2.7MW = 656.1MW<\/strong><\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Installed energy reaches published project scale. Catalogue AC capacity sits more than 2.5\u00d7 the 260MW rating.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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What 243 energy blocks imply<\/h3>\t\t\t\t<\/div>\n\t\t\t\t
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If 243 equal energy blocks share a 260MW plant limit, each block carries only about 1.07MW<\/strong> of project-level AC on average.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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That does not rewrite the listed 2.7MW rating of a standard 5000INTL. It points to another layout: custom PCS allocation, DC-coupled energy blocks, centralised conversion, or another controlled topology.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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MegSolid still has to confirm whether that layout is offered for the job. The standard integrated 5000INTL stays 2.7MW \/ 5.0159MWh<\/strong> until a controlled proposal says otherwise.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Same power-vs-energy split shows up on other large delivery jobs: contracted power and energy drive different container and PCS counts<\/a><\/strong>.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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The final container count needs six adjustments<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Usable SOC window<\/strong> The BMS may reserve both ends of SOC. The contract should say whether 1,216MWh is gross installed, usable DC or another declared boundary.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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End-of-life capacity<\/strong> Four hours at beginning of life, at a later warranty year, or through the whole contract \u2014 each choice changes initial count and augmentation.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Conversion and collection losses<\/strong> Battery, PCS, transformers, MV collection and the 275kV tie sit on different sides of the sum. Allocation follows the delivery point.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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\u0627\u0644\u0627\u0633\u062a\u0647\u0644\u0627\u0643 \u0627\u0644\u0645\u0633\u0627\u0639\u062f<\/strong> Liquid cooling, pumps, controls, fire systems, heaters and substation loads all draw energy. Settlement and test methods must say whether auxiliaries sit inside or outside the delivery boundary.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Availability and maintenance isolation<\/strong> N-1 design, planned outages and forced outages can add blocks beyond a pure energy count. The plant controller needs a defined way to report available MW when one block is offline.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Reactive-power duty<\/strong> 260MW of active power is not the full MVA story. GPS studies can demand reactive current in voltage events, which eats PCS headroom and can resize transformers.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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PCS boundary questions: MegSolid PCS engineering framework<\/a><\/strong>. Project grid-forming and reactive-current capability still need approved models and settings.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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GPS acceptance changes the evidence package<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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GPS acceptance locks the technical performance standards for connection to the NEM. It does not turn a catalogue rating into an approved plant design.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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AEMO modelling requirements<\/a> ask connection applicants for a model package that matches the structure and performance of the generating plant, under the Power System Model Guidelines and data sheets.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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For a multi-container BESS the chain usually includes:<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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