BESS comparison
AlphaESS Aster 5000 vs CALB 20ft 5MWh High-Voltage Liquid-Cooled Container ESS
Both columns come from what AlphaESS and CALB publish. Fields either maker does not publish are marked «not published»; we do not estimate or rank.
AlphaESS
Aster 5000
5.016 MWh
20 ft containerliquid-cooledLFPshipping
CALB
20ft 5MWh High-Voltage Liquid-Cooled Container ESS
5 MWh
20 ft containerliquid-cooledLFPshipping
Specifications side by side
| Field | AlphaESS Aster 5000 | CALB 20ft 5MWh High-Voltage Liquid-Cooled Container ESS |
|---|---|---|
| Max energy per enclosure | 5.016 MWh | 5 MWh |
| Max power per enclosure | 2.508 MW | not published |
| Published durations | 2 h | not published |
| Segment | utility-scale | utility-scale |
| Status | shipping | shipping |
| Cell chemistry | LFP | LFP |
| Cell capacity | not published | 314 Ah |
| Cell configuration | not published | not published |
| Cell supplier | not published | not published |
| Form factor | 20 ft container | 20 ft container |
| Block type | DC block | DC block |
| PCS integrated | no | no |
| DC voltage | 1331.2 (rated) V | not published |
| Cooling | liquid-cooled | liquid-cooled |
| Ingress protection | IP55 | not published |
| Operating temperature | -40…50 (battery module) °C | not published |
| Dimensions (L × W × H) | 6058 × 2438 × 2896 mm | not published |
| Weight | 43 t | not published |
| Energy density | not published | not published |
| Round-trip efficiency | not published | 95% |
| Cycle life | not published | not published |
| Calendar life | not published | 15 y |
| Warranty | not published | not published |
| Fire suppression | aerosol + sprinkler (redundant dual-extinguishing) + explosion relief panel | pack-level detection and suppression (one detector and one suppression unit per pack); system-level immersion water fire protection |
| Generation | V01 (2025-05) | 314Ah / 1P104S |
| Announced | not published | not published |
| Certifications | IEC 61000, IEC 62477, IEC 62619, IEC 62933, NFPA 69, UL 1973, UL 9540A | not published |
| Public datasheet | yes | no |
Where they differ
Only fields both manufacturers publish and where the values are not identical. Not a judgement — the right choice depends on the project.
- Max energy per enclosure: Aster 5000 — 5.016 MWh; 20ft 5MWh High-Voltage Liquid-Cooled Container ESS — 5 MWh
- Fire suppression: Aster 5000 — aerosol + sprinkler (redundant dual-extinguishing) + explosion relief panel; 20ft 5MWh High-Voltage Liquid-Cooled Container ESS — pack-level detection and suppression (one detector and one suppression unit per pack); system-level immersion water fire protection
- Generation: Aster 5000 — V01 (2025-05); 20ft 5MWh High-Voltage Liquid-Cooled Container ESS — 314Ah / 1P104S
- Public datasheet: Aster 5000 — yes; 20ft 5MWh High-Voltage Liquid-Cooled Container ESS — no
Published by only one of the two: Max power per enclosure, Published durations, Cell capacity, DC voltage, Ingress protection, Operating temperature, Dimensions (L × W × H), Weight, Round-trip efficiency, Calendar life, Certifications.
Variants
AlphaESS Aster 5000 variants
| Variants | Energy | Power | Duration |
|---|---|---|---|
| Aster 5000 (AlphaCS-H20-DC-LC-EX, 12 clusters, 0.5 P) | 5.016 MWh | 2.508 MW | 2 h |
CALB 20ft 5MWh High-Voltage Liquid-Cooled Container ESS variants
| Variants | Energy | Power | Duration |
|---|---|---|---|
| 5 MWh | 5 MWh | not published | not published |
Full model cards
Open AlphaESS Aster 5000 →Open CALB 20ft 5MWh High-Voltage Liquid-Cooled Container ESS →
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