EcoFlow River 2 vs Anker 521 PowerHouse
A spec-by-spec breakdown to settle it. Prices and value metric (cost per usable Wh) included.
| EcoFlow River 2 |
Anker 521 PowerHouse |
|
|---|---|---|
| Price | $189 | $186 |
| Battery capacity | 256 Wh | 256 Wh |
| Usable capacity | 230 Wh | 230 Wh |
| Real usable at outlet (AC) | 196 Wh | 196 Wh |
| AC output (continuous) | 300 W | 200 W |
| Surge output | 600 W | 400 W |
| Battery chemistry | LiFePO4 | LiFePO4 |
| Rated cycle life | 3000 cycles | 3000 cycles |
| Max solar input | 110 W | 100 W |
| Expandable | No | No |
| Weight | 7.7 lb | 8.2 lb |
| Warranty | 5 yrs | 5 yrs |
| Cost per usable Wh | $0.822/Wh | $0.813/Wh |
| Check price → | Check price → |
Bottom line
For pure value, the Anker 521 PowerHouse wins on cost per usable Wh. Need the most capacity? The EcoFlow River 2 holds 256 Wh. Prioritizing portability? The EcoFlow River 2 is lighter at 7.7 lb. Match the choice to how you scored on the sizing calculator.
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