Growatt ARK 12.8H-A1 vs Sessy 2.0 10 kWh
Usable capacity: Growatt ARK 12.8H-A1 –, Sessy 2.0 10 kWh 10.4 kWh. Both models win equally often (2 of 5 points).
Who wins where
- Growatt ARK 12.8H-A1
- Sessy 2.0 10 kWh
Biggest differences
| Fact | ARK 12.8H-A1 | 2.0 10 kWh |
|---|---|---|
| Min. operating temperature | -10 °C | 0 °C |
| Weight | 145 kg | 96 kg |
| Expandable up to | 25.6 kWh | 31.2 kWh |
| Nominal capacity | 12.8 kWh | 11 kWh |
Score per area = position (0–100) relative to all 130 models in this category; higher is better.
| Technical specifications | GrowattARK 12.8H-A1 | Sessy2.0 10 kWh |
|---|---|---|
| General | ||
| Cell chemistry | LFP 1 | LFP 2 |
| Smart charging on dynamic prices | – | Yes 2 |
| Wi-Fi / app | – | Yes 2 |
| Performance | ||
| Usable capacity | – | 10.4 kWh 2 |
| Nominal capacity | 12.8 kWh ✓ 1 | 11 kWh 2 |
| Expandable up to | 25.6 kWh 1 | 31.2 kWh ✓ 2 |
| Charge power (continuous) | – | 2.2 kW 2 |
| Discharge power (continuous) | – | 1.7 kW 2 |
| Efficiency | ||
| Depth of discharge | 90 % 1 | – |
| Electrical | ||
| Phases | – | 1 2 |
| Dimensions & weight | ||
| IP rating | IP65 1 | IP20 2 |
| Min. operating temperature | -10 °C ✓ 1 | 0 °C 2 |
| Width | 650 mm 1 | 410 mm 2 |
| Height | 1,085 mm 1 | 780 mm 2 |
| Depth | 260 mm 1 | 270 mm 2 |
| Weight | 145 kg 1 | 96 kg ✓ 2 |
| Warranty & lifespan | ||
| Warranted cycles | – | 6,000 2 |
| Warranty | 10 years 1 | 10 years 2 |
Sources
- ARK HV Battery System Datasheet, 2023 — SHENZHEN GROWATT NEW ENERGY CO.,LTD. · accessed 1 Oct 2026
- Sessy 2.0 10 kWh – specificaties, 09/2025 (tekst herkend met OCR) — Sessy B.V. · accessed 27 Sept 2026