Sungrow · commercial & industrial
Sungrow PowerStack 255CS
shippingcabinetAC block (PCS integrated)liquid-cooledLFP · 314 AhBNEF Tier 1
Everything below comes from what Sungrow publishes about the PowerStack 255CS: 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 |
|---|---|---|---|
| ST255CS-2H (400 V, 50/60 Hz) | 257 kWh | 125 kW | 2 h |
| ST510CS-4H (256S2P, 2152 x 2470 x 1610 mm, 5,300 kg) | 514 kWh | 125 kW | 4 h |
| ST255CS-2H-US (125 kVA @ 45 °C, 480 V, 60 Hz, NEMA 3R) | 257 kWh | 125 kW | 2 h |
| ST510CS-4H-AU (110 kW; AU site names it PowerStack 510CS) | 514 kWh | 110 kW | 4 h |
Specifications
| Cell chemistry | LFP |
|---|---|
| Cell capacity | 314 Ah |
| Cell configuration | 256S1P |
| Cell supplier | not published |
| Form factor | cabinet |
| Block type | AC block (PCS integrated) |
| PCS integrated | yes |
| DC voltage | 691.2–934.4 V |
| Cooling | liquid-cooled |
| Ingress protection | IP55 |
| Operating temperature | -30…50 (derating >45) °C |
| Dimensions (L × W × H) | 1150 × 1610 × 2450 mm |
| Weight | 3.2 t |
| Energy density | not published |
| Round-trip efficiency | 90% |
| Cycle life | not published |
| Calendar life | not published |
| Warranty | not published |
| Fire suppression | Hot aerosol extinguishing with combustible-gas, smoke and heat detectors and alarm sounder; US variant: water-based fire suppression plus ventilation system |
| Generation | 255CS |
| Announced | not published |
Certifications
IEC 62619IEC 63056IEC 62040IEC 62477IEC 61000IEC 62933UN 38.3UL1741 SBIEEE1547:2018UL 1973UL 9540AUL 9540NFPA855NFPA69
Key facts
- All-in-one liquid-cooled C&I cabinet: 314 Ah LFP (256S1P, 257 kWh) with 125 kW integrated PCS, 400 V 3P4L, on-grid and off-grid (100% unbalanced load)
- Product page states system RTE 90% and PCS efficiency up to 98.5%; auxiliary heat loss reduced 33% by AI thermal balance
- Parallel up to 25 units on-grid / 10 off-grid (2H) or 20 off-grid (4H); ≤65 dB(A) at 1 m; C4 default, C5 optional
- US SKU ST255CS-2H-US: 480 V, 60 Hz, NEMA 3R, ≤3,000 kg, 2,000 m, UL 9540 / UL 9540A / UL 1973 / NFPA 855 / NFPA 69
- Cell supplier, cycle life, warranty and calendar life are not published; ST510CS-4H is listed under the residential-ESS URL path on the global site
What Sungrow 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 supplierEnergy densityCycle lifeCalendar lifeWarrantyAnnounced
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Sourcing quote for Sungrow PowerStack 255CS
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: Sungrow — ST255CS-2H product page · Datasheet ST255CS-2H (PDF) · Sungrow — ST510CS-4H product page · Datasheet ST510CS-4H (PDF) · Sungrow US — ST255CS-2H-US product page · Datasheet ST255CS-2H-US (PDF) · Sungrow AU — ST510CS-4H-AU product page