Battery guides
Figures come from manufacturer datasheets and warranty documents, quoted and dated. We have not tested these batteries.
| Battery | Capacity | Power (basis shown) | Warranty | Coupling | Backup |
|---|---|---|---|---|---|
| Tesla Powerwall 3 | 13.5 kWh | up to 11.04 kW AC on-grid, site-dependent | 10 years | Hybrid (built-in inverter) | With extra equipment |
| SolarEdge Home Battery 400V | 9.7 kWh | 5 kW Battery DC continuous | 10 years | DC-coupled | With extra equipment |
| Fox ESS EP11 | 10.36 kWh (nominal / stated, not usable) | Not established Confirm the matched inverter | 10 years | – | – |
| GivEnergy All in One 2 | 13.5 kWh (stated) | 6 to 12 kW AC rated, version-dependent | 15 years | AC-coupled | With extra equipment |
| Enphase IQ Battery 5P with FlexPhase | 5.0 kWh | 3.84 kVA AC apparent power (kVA) | 15 years | AC-coupled | With extra equipment |
| GivEnergy All in One | 13.5 kWh | 6.0 kW AC continuous | 12 years | AC-coupled | With extra equipment |
| Sigenergy SigenStor BAT 8.0 | 7.8 kWh | 4 kW Battery DC maximum | 10 years | – | – |
| myenergi libbi | 4.6 kWh | 3.68 kW AC nominal, inverter-dependent | 10 years | AC or DC | – |
| EcoFlow PowerOcean Single-phase | 4.8 kWh | 3 to 6 kW Rated on-grid AC, inverter-dependent | 15 years | – | With extra equipment |
| Growatt ARK 5.1XH-A1 | 5.12 kWh (nominal / stated, not usable) | 2.5 kW Battery-system DC maximum | 10 years | – | – |
| Huawei LUNA2000-7-S1 | 6.9 kWh | 3.5 kW Battery DC maximum | 15 years | – | – |
| Sunsynk SUN-BATT-5.32 | 5320 Wh battery energy as stated; a sepa (nominal / stated, not usable) | 2.5 kW Battery DC nominal / maximum | – | – | – |
Click a battery for the full wording, the quote and the source. Capacity is usable capacity unless marked “stated”: some manufacturers give one capacity figure without saying how much of it you can use. “–” means the figure is not in the manufacturer documents we checked. W values are divided by 1,000 to display kW; the guide preserves the original units. kVA is apparent power and is never silently relabelled kW. Battery-side DC limits and inverter AC ratings are shown with their basis; they are not directly comparable. A guide can explain a missing specification without inventing it.
What to compare
- Usable capacity (kWh) decides how much of your evening you can cover.
- Power (kW) limits how much the battery can supply at once, for example the kettle, oven and heat pump together. Makers state it differently (kW or kVA, per battery or per system), so compare like with like on the guide page.
- Warranty: the years, any energy throughput limit, and the capacity promised at the end.
- Coupling: AC-coupled batteries usually sit next to your existing solar inverter; a hybrid inverter can mean replacing it. Which applies depends on your current system, so ask the installer.
Comparing actual quotes? Use the quote comparer.