BLUETTI AC50B vs EcoFlow RIVER 3 Plus
Technical comparison · Ultraportable
Two lithium iron phosphate ultraportables built for the same use: the BLUETTI AC50B stores 448 Wh and weighs 6.7 kg, the EcoFlow RIVER 3 Plus 286 Wh and 4.7 kg, going by manufacturer-declared figures. The choice is between more runtime and less weight to carry.
| 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 | 1045.45 €/kWh |
| List price | 409 € | 299 € |
| Weight | 6.7 kg | 4.7 kg |
| Dimensions (W×D×H) | — | 23.4 × 23.2 × 14.6 cm |
| Outlets | ||
| AC outlets | Yes | — |
| 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 | 0.573 €/kWh |
| Energy density | 66.9 Wh/kg | 60.9 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) |
| Price | ||
| Price | — | ~200–450 € |
| Category specs | ||
| Expandable | Yes | Yes |
| Maximum expanded capacity | — | 0.858 kWh |
| 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
- Capacity, 448 Wh vs 286 Wh → at a 100 W load the first lasts about 4.5 hours, the second under 3, before conversion losses.
- Weight, 6.7 kg vs 4.7 kg → 2 kg you feel every time you move it.
- Maximum charge power, 580 W vs 380 W → the first refills in less time.
- USB-C, 65 W vs 100 W → a demanding laptop at full speed needs the second.
Which one to choose
Choose BLUETTI AC50B if…
you want a laptop, lights and small appliances to last longer while camping or during an outage: 448 Wh and 700 W continuous, with a maximum charge power of 580 W. You accept 2 kg more to carry and a USB-C port that stops at 65 W.
Choose EcoFlow RIVER 3 Plus if…
you carry the battery in a backpack or a car and need a 100 W USB-C port for the laptop: 4.7 kg, a 1200 W peak for start-up surges, 30 dB of noise and expansion up to 858 Wh. You accept 286 Wh of capacity and a maximum charge power of 380 W.
Where to buy
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