EcoFlow RIVER 3
245 Wh · 300 W output · LiFePO4 · $239
✅ Specs verified against the manufacturer's official listing — source · Last checked
Our verdict
A glorified power bank with AC outlets — and that's fine if that's what you need. 245Wh runs devices, not appliances.
Best for: Weekend campers charging phones, cameras and a laptop.
What we like
- 7.8 lb and under $250
- LiFePO4 at an entry price most rivals reserve for lithium-ion
- 60-minute full recharge
Where it falls short
- 300W output rules out anything with a heating element
- No expansion path
Full specifications
| Capacity | 245 Wh |
|---|---|
| Continuous output | 300 W |
| Surge output | 600 W |
| Battery chemistry | LiFePO4 |
| Rated cycles | 3,000 |
| Weight | 7.8 lb |
| Max solar input | 110 W |
| Recharge (AC) | 1h |
| Expandable | No |
| Warranty | 5 years |
What can the EcoFlow RIVER 3 run?
| Appliance | Can start it? | Est. runtime |
|---|---|---|
| Refrigerator | ❌ Surge too high | — |
| Mini fridge | ✅ Yes | 6.6 hrs |
| Chest freezer | ❌ Surge too high | — |
| CPAP machine | ✅ Yes | 5.2 hrs |
| Sump pump | ❌ Surge too high | — |
| Well pump (1/2 HP) | ❌ Surge too high | — |
| Space heater | ❌ Surge too high | — |
| Window AC (8k BTU) | ❌ Surge too high | — |
| Microwave | ❌ Surge too high | — |
| Coffee maker | ❌ Surge too high | — |
| TV (55" LED) | ✅ Yes | 2.1 hrs |
| Laptop | ✅ Yes | 3.2 hrs |
| Phone charger | ✅ Yes | 10.4 hrs |
| CPAP + humidifier | ✅ Yes | 2.3 hrs |
| Fridge plus essentials | ❌ Surge too high | — |
| 12V RV fridge | ✅ Yes | 11.6 hrs |
| Starlink | ✅ Yes | 3.5 hrs |
| Electric blanket | ✅ Yes | 6.9 hrs |
Runtime = (capacity × 0.85 inverter efficiency) ÷ appliance watts. Refrigerator assumes a 40% compressor duty cycle. Real-world results vary.