SAX Power Home 5,8 kWh vs Zendure SolarFlow 4000 Mix AC+
Technical comparison · All-in-one
Two single-phase all-in-one home batteries. The choice comes down to two things: where it is installed (a temperate indoor room, or a cold or exposed space) and what kind of backup you want (full island mode or UPS-style continuity).
| Parameter | ||
|---|---|---|
| Awards | — | |
| In brief | ||
| Usable capacity | 5.2 kWh | — |
| Continuous output | 4600 W | 3680 W |
| Cell chemistry | LFP (lithium iron phosphate) | — |
| Cost per kWh | — | 200 €/kWh |
| List price | — | 1600 € |
| Weight | 53 kg | 80 kg |
| Dimensions (W×D×H) | 53 × 25 × 53 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 % | 70 % |
| Warranty | 5 anni | 10 anni |
| Guaranteed remaining capacity | 80 % | — |
| The numbers | ||
| Cost of stored energy | — | 0.061 €/kWh |
| Energy density | 98.1 Wh/kg | 100 Wh/kg |
| Power-to-capacity ratio | 0.88 C | 0.46 C |
| Identity | ||
| Use tier | F3 — Flat-sized (3–8 kWh) | F3 — Flat-sized (3–8 kWh) |
| Price | ||
| Price | — | 1999 € |
| Category specs | ||
| Expandable | Yes | — |
| Maximum expanded capacity | 17.3 kWh | — |
| Phases | Single-phase | Single-phase |
| Maximum charge power | 2.5 kW | 4 kW |
| Backup power | Full island mode | UPS |
| Backup phases | Single-phase | — |
| Switchover time | — | 10 ms |
| Black start | Yes | — |
| Grid charging | — | Yes |
| Dynamic tariffs | — | Built in |
| Round-trip efficiency | — | 90 % |
| Standby consumption | 4 W | — |
| Ingress protection | IP30 | IP65 |
| Mounting | Wall mounted | — |
| Minimum temperature | 5 °C | -20 °C |
| Maximum temperature | 35 °C | 55 °C |
| Works without internet | — | With limitations |
| Local control | Modbus | — |
| Open protocols | Modbus TCP, Modbus RTU | — |
| Remote updates | Mandatory | — |
| Declared standards | VDE-AR-N 4105, UN 38.3 | — |
| 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, full island vs UPS continuity → the first runs the house on its own during an outage; the second steps in like an uninterruptible supply.
- Installation, IP30 and 5 to 35 °C vs IP65 and -20 to 55 °C → the first belongs in a temperate indoor room, the second tolerates extreme cold and heat.
- Power, 4,600 W continuous and 2.5 kW charging vs 3,680 W and 4 kW → the first delivers more, the second recharges faster.
- Warranty, 5 years vs 10 years; weight, 53 kg vs 80 kg → the second lasts twice as long on paper but weighs 27 kg more.
Which one to choose
Choose SAX Power Home 5,8 kWh if…
you install indoors and want the house to keep running in full island mode during an outage: it works between 5 and 35 °C and mounts on the wall (manufacturer-declared values). The trade-off: IP30 limits it to dry indoor rooms, and its maximum charge power is lower.
Choose Zendure SolarFlow 4000 Mix AC+ if…
the battery sits somewhere cold or exposed, and you want faster charging and a long warranty. The trade-off: backup is UPS-type rather than full island, continuous power is lower, and 80 kg calls for careful handling and a solid mounting.
Where to buy
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