BLUETTI AC50B vs EcoFlow RIVER 3 Plus Wireless
Technical comparison · Ultraportable
Two ultraportables with the same warranty and the same declared cycle count: what separates them is reserve against weight, 448 Wh at 6.7 kg on one side, 286 Wh at 5.2 kg on the other.
| Parameter | ||
|---|---|---|
| In brief | ||
| Nominal capacity | 0.448 kWh | 0.286 kWh |
| Continuous output | 700 W | 600 W |
| Peak output | 1000 W | 1200 W |
| Cell chemistry | LFP (lithium iron phosphate) | LFP (lithium iron phosphate) |
| Cost per kWh | 912.95 €/kWh | 1220.28 €/kWh |
| List price | 409 € | 349 € |
| Weight | 6.7 kg | 5.2 kg |
| Dimensions (W×D×H) | — | 23.4 × 23.2 × 15.2 cm |
| Outlets | ||
| AC outlets | Yes | Yes (×3) |
| How long it lasts | ||
| Battery life cycles | 1825 cicli | 1825 cicli |
| The limit that runs out first | anni di garanzia | anni di garanzia |
| Rated cycles | 3000 cicli | 3000 cicli |
| Capacity at end of cycle life | 80 % | 80 % |
| Warranty | 5 anni | 5 anni |
| The numbers | ||
| Cost of stored energy | 0.5 €/kWh | 0.669 €/kWh |
| Energy density | 66.9 Wh/kg | 55 Wh/kg |
| Power-to-capacity ratio | 1.56 C | 2.1 C |
| Identity | ||
| Use tier | F1 — Outlet-sized (up to 1 kWh) | F1 — Outlet-sized (up to 1 kWh) |
| Category specs | ||
| Expandable | Yes | Yes |
| Fastest USB-C | 65 W | 100 W |
| Maximum charge power | 0.58 kW | 0.38 kW |
| 0–80% charge time | 45 min | — |
| Maximum solar input | 200 W | 220 W |
| Backup power | UPS | UPS |
| Switchover time | 20 ms | 10 ms |
| Mounting | Portable | Portable |
| Minimum temperature | -20 °C | — |
| Maximum temperature | 40 °C | — |
| Noise level | — | 30 dB |
| App required for setup | No | — |
The differences that matter
- 448 Wh vs 286 Wh → at a 100 W load, in theory four and a half hours against just under three.
- 6.7 kg vs 5.2 kg → a kilo and a half you feel when carrying it every day.
- USB-C at 65 W vs 100 W → a laptop that asks for up to 100 W only charges at full speed from the second.
- Charging at 0.58 kW vs 0.38 kW → the first refills faster between uses.
Manufacturer-declared values.
Which one to choose
Choose BLUETTI AC50B if…
you want to work a whole evening away from a socket, about four hours at a 100 W load. The trade-off is a heavier bag and a USB-C port that charges a demanding laptop more slowly.
Choose EcoFlow RIVER 3 Plus Wireless if…
the battery goes in a backpack next to the laptop, which you charge straight from its USB-C port, and you want three mains sockets for chargers and small appliances. The cost is reserve: under three hours at a 100 W load, and slower charging from the wall.
Where to buy
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