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EcoFlow · portable power station
EcoFlow River 3 Max
Mid-size class (500–1,499 Wh). #45 of 218 portable power stations on Benchwatt by popularity on Amazon US.
Capacity
572 Wh
Output
990 W
Weight
—
Wh per lb
—
Price and availability are on Amazon; we don't show or track prices.
Published specs
| Brand | EcoFlow |
|---|---|
| Model | River 3 Max |
| Battery capacity | 572 Wh |
| Rated AC output (continuous) | 990 W |
| Surge / peak output | 1,200 W |
| Battery chemistry | LiFePO4 |
| Rated charge cycles (per the listing) | 3,000 |
| Max solar input | 220 W |
| Expandable with extra batteries | Yes |
| UPS / switchover (per the listing) | Yes |
| Amazon ASIN | B0F4XRNTWX |
| Specs checked | November 11, 2026 |
From the maker's listing. Specs not stated there are left out rather than guessed.
Runtime estimates
Hours = 572 Wh × 0.85 ÷ device watts. Typical draws; check your own device's label.
| Device | Draw | Runtime |
|---|---|---|
| Phone charging | 10 W | 49 h |
| Laptop | 60 W | 8.1 h |
| CPAP (no humidifier) | 40 W | 12 h |
| Mini fridge (average draw) | 60 W | 8.1 h |
| Full-size fridge (700 kWh/yr label) | 80 W | 6.1 h |
| TV | 100 W | 4.9 h |
| Space heater | 1,500 W | Exceeds rated output |
Estimates, not measurements. Fridges cycle on and off, so their average draw is well under their rated watts; heaters and kettles run near full power.
Similar capacity
Other portable power stations within ±35% of 572 Wh, most popular first.
| Model | Capacity | Output | Cells | Weight | Wh/lb | Amazon link |
|---|---|---|---|---|---|---|
| EcoFlow River 3 Max | 572 Wh | 990 W | LiFePO4 | — | — | Check price on Amazon |
| LIBRIDS H1008 | 640 Wh | 600 W | LiFePO4 | 18 lb | 36 | Check price on Amazon |
| EcoFlow River 2 Max | 499 Wh | 1,000 W | LiFePO4 | 10.2 lb | 49 | Check price on Amazon |
| EcoFlow River 2 Pro | 768 Wh | 800 W | LiFePO4 | 18.2 lb | 42 | Check price on Amazon |
| GRECELL EB500 (519 Wh) | 519 Wh | 500 W | — | 18 lb | 29 | Check price on Amazon |
| LIBRIDS Solar Generator 600 | 640 Wh | 600 W | LiFePO4 | 16.3 lb | 39 | Check price on Amazon |
| GRECELL T-500 | 519 Wh | 500 W | — | 14.1 lb | 37 | Check price on Amazon |
EcoFlow River 3 Max
572 Wh / 990 W · LiFePO4. See the current price and seller on Amazon.