BESS comparison
AlphaESS Aster 5000 vs Great Power Max-20HC-5000
Both columns come from what AlphaESS and Great Power 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
Great Power
Max-20HC-5000
5 MWh
20 ft containerliquid-cooledLFPshipping
Specifications side by side
| Field | AlphaESS Aster 5000 | Great Power Max-20HC-5000 |
|---|---|---|
| Max energy per enclosure | 5.016 MWh | 5 MWh |
| Max power per enclosure | 2.508 MW | 2.5 MW |
| Published durations | 2 h | 2 h |
| Segment | utility-scale | utility-scale |
| Status | shipping | shipping |
| Cell chemistry | LFP | LFP |
| Cell capacity | not published | 314 Ah |
| Cell configuration | not published | 1P416S ×12 |
| 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 | 1164.8–1497.8 V |
| Cooling | liquid-cooled | liquid-cooled |
| Ingress protection | IP55 | IP55 |
| Operating temperature | -40…50 (battery module) °C | -35…60 (discharge), -30…50 (charge) °C |
| Dimensions (L × W × H) | 6058 × 2438 × 2896 mm | 6058 × 2438 × 2896 mm |
| Weight | 43 t | 46 t |
| Energy density | not published | not published |
| Round-trip efficiency | not published | 95% |
| Cycle life | not published | not published |
| Calendar life | not published | not published |
| Warranty | not published | not published |
| Fire suppression | aerosol + sprinkler (redundant dual-extinguishing) + explosion relief panel | aerosol + water |
| Generation | V01 (2025-05) | 2024 |
| Announced | not published | 2024-09 |
| Certifications | IEC 61000, IEC 62477, IEC 62619, IEC 62933, NFPA 69, UL 1973, UL 9540A | GB/T 36276, IEC 61000, IEC 62619, IEC 62933, NFPA 68, NFPA 69, NFPA 72, NFPA 855, UL 1973, UL 9540, UL 9540A |
| Public datasheet | yes | yes |
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; Max-20HC-5000 — 5 MWh
- Max power per enclosure: Aster 5000 — 2.508 MW; Max-20HC-5000 — 2.5 MW
- DC voltage: Aster 5000 — 1331.2 (rated) V; Max-20HC-5000 — 1164.8–1497.8 V
- Operating temperature: Aster 5000 — -40…50 (battery module) °C; Max-20HC-5000 — -35…60 (discharge), -30…50 (charge) °C
- Weight: Aster 5000 — 43 t; Max-20HC-5000 — 46 t
- Fire suppression: Aster 5000 — aerosol + sprinkler (redundant dual-extinguishing) + explosion relief panel; Max-20HC-5000 — aerosol + water
- Generation: Aster 5000 — V01 (2025-05); Max-20HC-5000 — 2024
- Certifications: Aster 5000 — IEC 61000, IEC 62477, IEC 62619, IEC 62933, NFPA 69, UL 1973, UL 9540A; Max-20HC-5000 — GB/T 36276, IEC 61000, IEC 62619, IEC 62933, NFPA 68, NFPA 69, NFPA 72, NFPA 855, UL 1973, UL 9540, UL 9540A
Published by only one of the two: Cell capacity, Cell configuration, Round-trip efficiency, Announced.
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 |
Great Power Max-20HC-5000 variants
| Variants | Energy | Power | Duration |
|---|---|---|---|
| 5.0 MWh @0.5C (≤417 kW ×6 / 1.25 MW ×2) | 5 MWh | 2.5 MW | 2 h |
Full model cards
Open AlphaESS Aster 5000 →Open Great Power Max-20HC-5000 →
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