SAX Power Home 5,8 kWh vs sonnenBatterie 10 hybrid
Technical comparison · All-in-one
Two all-in-one batteries with the same usable energy, about 5 kWh. They differ in how they handle a blackout: the SAX Power Home works in full island mode on one phase, while the sonnenBatterie 10 hybrid supplies all three phases after a brief interruption (EPS). All figures are manufacturer-declared.
| Parameter | ||
|---|---|---|
| In brief | ||
| Usable capacity | 5.2 kWh | 5 kWh |
| Continuous output | 4600 W | 2500 W |
| Cell chemistry | LFP (lithium iron phosphate) | LFP (lithium iron phosphate) |
| Weight | 53 kg | — |
| Dimensions (W×D×H) | 53 × 25 × 53 cm | 69 × 36 × 172 cm |
| How long it lasts | ||
| Battery life cycles | 1825 cicli | 3650 cicli |
| The limit that runs out first | anni di garanzia | anni di garanzia |
| Rated cycles | 10000 cicli | 10000 cicli |
| Capacity at end of cycle life | 80 % | — |
| Warranty | 5 anni | 10 anni |
| Guaranteed remaining capacity | 80 % | — |
| The numbers | ||
| Energy density | 98.1 Wh/kg | — |
| Power-to-capacity ratio | 0.88 C | 0.5 C |
| Identity | ||
| Use tier | F3 — Flat-sized (3–8 kWh) | F3 — Flat-sized (3–8 kWh) |
| Category specs | ||
| Expandable | Yes | Yes |
| Maximum expanded capacity | 17.3 kWh | 25 kWh |
| Phases | Single-phase | Three-phase |
| Maximum charge power | 2.5 kW | 2.5 kW |
| Backup power | Full island mode | EPS (brief interruption) |
| Backup phases | Single-phase | Three-phase |
| Switchover time | — | 5000 ms |
| Black start | Yes | — |
| EV charger integration | — | Yes |
| Standby consumption | 4 W | — |
| Ingress protection | IP30 | IP30 |
| Mounting | Wall mounted | — |
| Minimum temperature | 5 °C | -5 °C |
| Maximum temperature | 35 °C | 45 °C |
| Noise level | — | 35 dB |
| Local control | Modbus | — |
| Open protocols | Modbus TCP, Modbus RTU | — |
| Remote updates | Mandatory | — |
| Declared standards | VDE-AR-N 4105, UN 38.3 | — |
The differences that matter
- Backup power, full island on one phase vs EPS on three phases → in a blackout the SAX supplies one phase in island mode; the sonnenBatterie supplies all three after a brief pause.
- Continuous output, 4600 W vs 2500 W → the SAX carries more loads together.
- Warranty, 5 years vs 10 → the sonnenBatterie stays covered twice as long.
- Maximum expanded capacity, 17.3 kWh vs 25 kWh → more room to grow with the sonnenBatterie.
Which one to choose
Choose SAX Power Home 5,8 kWh if…
the house is single-phase and space is tight: 53 × 25 × 53 cm, against 69 × 36 × 172 cm. The trade-off is a 5–35 °C operating range, so an indoor room.
Choose sonnenBatterie 10 hybrid if…
the house is three-phase and the room can be cold or hot: -5 to 45 °C with IP30. The trade-off is a cabinet 172 cm tall on a 69 × 36 cm base, and less continuous power.
Where to buy
The purchase links are the same as on the two product pages and don't influence the verdict. The product pages have the complete data.