AlphaESS · commercial & industrial
AlphaESS Aster TB250/TB500
shipping20 ft containerAC block (PCS integrated)liquid-cooledLFPBNEF Tier 1
Everything below comes from what AlphaESS publishes about the Aster TB250/TB500: 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 |
|---|---|---|---|
| Aster TB250 (min. configuration 705 kWh / 250 kW) | 705 kWh | 250 kW | 2.8 h |
| Aster TB500-EX01 (6 clusters, 1410.73 kWh / 500 kW) | 1.411 MWh | 500 kW | 2.8 h |
Specifications
| Cell chemistry | LFP |
|---|---|
| Cell capacity | not published |
| Cell configuration | not published |
| Cell supplier | not published |
| Form factor | 20 ft container |
| Block type | AC block (PCS integrated) |
| PCS integrated | yes |
| DC voltage | 631.8–842.4 (rated 748.8) V |
| Cooling | liquid-cooled |
| Ingress protection | IP55 |
| Operating temperature | -30…50 (battery module) °C |
| Dimensions (L × W × H) | 6058 × 2438 × 2896 mm |
| Weight | 23 t |
| Energy density | not published |
| Round-trip efficiency | not published |
| Cycle life | not published |
| Calendar life | not published |
| Warranty | not published |
| Fire suppression | aerosol |
| Generation | V2.4 (2026-01) |
| Announced | not published |
Certifications
UN38.3UN3536IEC 62619IEC 62477IEC 61000UL 9540A
Key facts
- AC-coupled 20 ft container: 250–500 kW / 705–1410 kWh, up to 6 clusters of 52.24 kWh M166314-52S-EX modules
- PWS1-500KTL-EX PCS (500 kW, 880 A) and 500 kVA WT500K transformer, 400/800 V AC output options
- 1000 V-class liquid-cooled battery, IP67 modules, aerosol suppression, 23 t
- Cycle life, RTE and warranty not stated in datasheet
What AlphaESS 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 capacityCell configurationCell supplierEnergy densityRound-trip efficiencyCycle lifeCalendar lifeWarrantyAnnounced
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Sourcing quote for AlphaESS Aster TB250/TB500
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: AlphaESS — Aster TB250/TB500 product page · Aster TB250/TB500 datasheet (PDF)