E3/DC S10 X Compact vs sonnenBatterie 10 performance
Technical comparison · All-in-one
Two three-phase home batteries with LFP cells and a ten-year warranty: what decides the choice is backup power. E3/DC S10 X Compact keeps the house running during an outage; sonnenBatterie 10 performance has no such function but offers more capacity and far more room to expand.
| Parameter | ||
|---|---|---|
| In brief | ||
| Usable capacity | 8.25 kWh | 10 kWh |
| Continuous output | 12000 W | 7000 W |
| Cell chemistry | LFP (lithium iron phosphate) | LFP (lithium iron phosphate) |
| Weight | 130 kg | 165 kg |
| Dimensions (W×D×H) | 59 × 50 × 120 cm | 69 × 36 × 172 cm |
| How long it lasts | ||
| Battery life cycles | 3650 cicli | 3650 cicli |
| The limit that runs out first | anni di garanzia | anni di garanzia |
| Rated cycles | — | 10000 cicli |
| Warranty | 10 anni | 10 anni |
| Guaranteed remaining capacity | 80 % | — |
| The numbers | ||
| Energy density | 63.5 Wh/kg | 60.6 Wh/kg |
| Power-to-capacity ratio | 1.45 C | 0.7 C |
| Identity | ||
| Use tier | F4 — House-sized (8–20 kWh) | F4 — House-sized (8–20 kWh) |
| Universal specs | ||
| Voltage | 230 V | — |
| Category specs | ||
| Expandable | Yes | Yes |
| Maximum expanded capacity | 11.2 kWh | 50 kWh |
| Phases | Three-phase | Three-phase |
| Maximum charge power | 6 kW | 7 kW |
| Backup power | EPS (brief interruption) | None |
| Backup phases | Three-phase | None |
| Grid charging | Yes | — |
| Dynamic tariffs | Built in | — |
| EV charger integration | — | Yes |
| Heat pump integration | Yes | — |
| Virtual power plant | — | sonnenVPP |
| Ingress protection | IP20 | IP30 |
| Minimum temperature | 5 °C | -5 °C |
| Maximum temperature | 35 °C | 45 °C |
| Works without internet | Fully | — |
| Local control | Modbus | — |
| Open protocols | Modbus TCP, CAN bus, EEBus | — |
| Declared standards | CE, UN 38.3, VDE-AR-N 4105, IEC 62619, VDE 2510-50 | VDE-AR-N 4105, UN 38.3, IEC 62619, VDE 2510-50 |
The differences that matter
- Backup → three-phase EPS with a brief interruption against none: in an outage only E3/DC S10 X Compact keeps the house on.
- Expansion → up to 11.2 kWh against 50 kWh: only the second leaves room to grow.
- Continuous power → 12 kW against 7 kW (manufacturer-declared values): how many three-phase loads can run together before the battery becomes the bottleneck.
- Environment → 5 to 35 °C against −5 to 45 °C: it changes where the unit can be installed.
Which one to choose
Choose E3/DC S10 X Compact if…
the house has to stay powered during a grid outage: backup is three-phase and kicks in after a brief interruption. It also works fully without internet and can be controlled locally over Modbus, CAN bus or EEBus. The trade-off: 8.25 kWh usable, expandable only to 11.2 kWh, and an operating range of 5 to 35 °C with IP20 protection.
Choose sonnenBatterie 10 performance if…
energy matters more than continuity: 10 kWh usable, expandable to 50 kWh, with wallbox communication and the sonnenVPP virtual power plant. The trade-off: during an outage it supplies nothing to the house. It weighs 165 kg against 130 kg.
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.