SAX Power Home 5,8 kWh vs Zendure SolarFlow 4000 Mix Pro
Technical comparison · All-in-one
Two single-phase batteries that handle a grid outage in different ways: SAX Power Home 5,8 kWh runs in full island mode and restarts without the grid, Zendure SolarFlow 4000 Mix Pro acts as a UPS with a 10 ms transfer. The installation location and the warranty differ as well.
| Parameter | ||
|---|---|---|
| In brief | ||
| Usable capacity | 5.2 kWh | — |
| Continuous output | 4600 W | 3680 W |
| Cell chemistry | LFP (lithium iron phosphate) | — |
| Cost per kWh | — | 450 €/kWh |
| List price | — | 3600 € |
| 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 | — | 0.137 €/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 | — | 2399 € |
| 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 |
| 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 |
The differences that matter
- Backup → full island mode with restart without grid against a UPS with a 10 ms transfer: two different ways of dealing with the loss of the grid, one to start again from zero, the other to avoid interruption.
- Warranty → 5 years against 10: Zendure's cover lasts twice as long.
- Environment → IP30 and 5 to 35 °C against IP65 and −20 to 55 °C: Zendure leaves much more freedom on where to install it.
- Power → 4.6 kW against 3.68 kW continuous (manufacturer-declared values), but Zendure charges at 4 kW against 2.5 kW.
Which one to choose
Choose SAX Power Home 5,8 kWh if…
you want a battery that keeps the house on an island and restarts without the grid, wall-mounted (53 kg) in a room between 5 and 35 °C. It offers 5.2 kWh usable, 4.6 kW continuous, local control over Modbus TCP or RTU and 4 W standby consumption. The trade-off: a five-year warranty, charging up to 2.5 kW and IP30 protection.
Choose Zendure SolarFlow 4000 Mix Pro if…
you want immediate continuity more than island operation: UPS with a 10 ms transfer, grid charging with time-of-use tariffs, IP65 and operation from −20 to 55 °C, ten years of warranty. The trade-off: 3.68 kW continuous against 4.6 kW, 80 kg against 53 kg and a 3 kW connection power.
Where to buy
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