sonnenBatterie 10 vs Zendure SolarFlow 4000 Mix AC+
Technical comparison · All-in-one
Two single-phase home batteries with close continuous output, 3.4 and 3.7 kW. What decides is what happens without the grid: sonnenBatterie 10 stops, Zendure SolarFlow 4000 Mix AC+ keeps connected loads running, and in reduced mode even without internet. Figures are manufacturer-declared.
| Parameter | ||
|---|---|---|
| Awards | — | |
| In brief | ||
| Usable capacity | 5 kWh | — |
| Continuous output | 3400 W | 3680 W |
| Cell chemistry | LFP (lithium iron phosphate) | — |
| Cost per kWh | — | 200 €/kWh |
| List price | — | 1600 € |
| Weight | 98 kg | 80 kg |
| Dimensions (W×D×H) | 69 × 27 × 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 | 10000 cicli |
| Capacity at end of cycle life | — | 70 % |
| Warranty | 10 anni | 10 anni |
| The numbers | ||
| Cost of stored energy | — | 0.061 €/kWh |
| Energy density | 51 Wh/kg | 100 Wh/kg |
| Power-to-capacity ratio | 0.68 C | 0.46 C |
| Identity | ||
| Use tier | F4 — House-sized (8–20 kWh) | F3 — Flat-sized (3–8 kWh) |
| Price | ||
| Price | — | 1999 € |
| Category specs | ||
| Expandable | Yes | — |
| Maximum expanded capacity | 20 kWh | — |
| Phases | Single-phase | Single-phase |
| Maximum charge power | 3.4 kW | 4 kW |
| Backup power | None | UPS |
| Backup phases | None | — |
| Switchover time | — | 10 ms |
| Grid charging | Yes | Yes |
| Dynamic tariffs | Built in | Built in |
| EV charger integration | Yes | — |
| Round-trip efficiency | — | 90 % |
| Ingress protection | IP30 | IP65 |
| Minimum temperature | -5 °C | -20 °C |
| Maximum temperature | 45 °C | 55 °C |
| Works without internet | — | With limitations |
| Declared standards | VDE-AR-N 4105, CEI 0-21, UN 38.3, IEC 62619, VDE 2510-50 | — |
| Grid connection power | — | 3 kW |
JouleSpecs Awards
No awards in this tier.
Best value Flat-sized (3–8 kWh)
Best balance of technical score and price among the 3 sheets in the All-in-one category (flat-sized tier): list price €1999, technical score 79/100.
How we assign awards →The differences that matter
- Backup power: none → UPS: in an outage the sonnenBatterie shuts the house down, the Zendure keeps connected loads on.
- IP30, -5 to 45 °C → IP65, -20 to 55 °C: the first wants an indoor room, the second tolerates a cold enclosure.
- Expandable up to 20 kWh (sonnenBatterie): start at 5 kWh and add modules.
Which one to choose
Choose sonnenBatterie 10 if…
the unit sits in a dry indoor room and you want to start at 5 kWh usable and reach 20 kWh with extra modules; it talks to the EV charger and declares CEI 0-21 compliance. The trade-off: no backup power, so without the grid the house stays dark, and protection is IP30.
Choose Zendure SolarFlow 4000 Mix AC+ if…
connected loads must stay on during an outage, with a declared 10 ms switchover, and the battery has to live in a cold or exposed spot (IP65, -20 to 55 °C). The trade-off: the declared connection power is 3 kW, below the 3,680 W continuous output.
Where to buy
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