Envision Energy · utility-scale
Envision Energy EN 12.5 MWh AI Energy Storage System
announcedmodular blockDC blockliquid-cooledLFP · 790 AhBNEF Tier 1
Everything below comes from what Envision Energy publishes about the EN 12.5 MWh AI Energy Storage System: the datasheet, the product page and press releases. Where a figure is not published, the field says so — we do not estimate.
Variants
Energy figures are nominal (beginning of life) as published by the manufacturer. One model, several duration options — the same enclosure with different power ratings.
| Variants | Energy | Power | Duration |
|---|---|---|---|
| EN 12.5 MWh | 12.5 MWh | not published | not published |
Specifications
| Cell chemistry | LFP |
|---|---|
| Cell capacity | 790 Ah |
| Cell configuration | not published |
| Cell supplier | not published |
| Form factor | modular block |
| Block type | DC block |
| PCS integrated | no |
| DC voltage | not published |
| Cooling | liquid-cooled |
| Ingress protection | not published |
| Operating temperature | not published |
| Dimensions (L × W × H) | not published |
| Weight | not published |
| Energy density | not published |
| Round-trip efficiency | not published |
| Cycle life | not published |
| Calendar life | not published |
| Warranty | not published |
| Fire suppression | not published |
| Generation | not published |
| Announced | 2026-04 |
Key facts
- Announced at ESIE Beijing, 1 April 2026: 12.5 MWh system built on the 790 Ah wound prismatic LFP ESS cell (>440 Wh/L, >15,000 cycles, 30-year calendar life, cell RTE 96 % — cell-level figures per Envision)
- Paired with a new 6.X–12.X MW 'AI-adaptive' PCS-transformer unit (3rd-gen SiC, 99.3 % efficiency, full load at 55 °C); system efficiency stated as >92 %
- Large-subarray layout claimed to cut site footprint by 37.6 % vs previous generation
- 790 Ah cell reported in mass production; system form factor, dimensions, weight, voltage and certifications not published (Chinese-language announcement only)
What Envision Energy does not publish for this model
These fields are empty because no public datasheet or release states them. That is information too: ask for these numbers before you shortlist.
Cell configurationCell supplierDC voltageIngress protectionOperating temperatureDimensions (L × W × H)WeightEnergy densityRound-trip efficiencyCycle lifeCalendar lifeWarrantyFire suppressionGeneration
Price signal
not published
No published price — Envision has not disclosed pricing for this flagship, launched April 2026 as the world's largest single BESS unit at the time. Built on a new 790Ah LFP prismatic cell (>440 Wh/L density, >15,000 cycles, up to 30-year calendar life, 96% cell-level RTE); already in mass production at Envision's Cangzhou superfactory. Supersedes the 8 MWh Gen 8 as Envision's flagship; no vendor quote exists to confirm a price against China's $75-84/kWh tender benchmarks.
From the Coloprice BESS Price Index — a benchmark, not an offer. See the index for how each figure was collected. See the BESS Price Index →
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Sourcing quote for Envision Energy EN 12.5 MWh AI Energy Storage System
Coloprice is published by Dream View, a China-sourcing company. For commercial-scale projects we buy BESS containers factory-direct — verified manufacturer, certification review, pre-shipment inspection, export and freight — for a flat 10% fee.
Sources: Envision Energy — 12.5 MWh AI ESS / 790 Ah cell (2026-04-04, CN)