EcoFlow RIVER 2 Max vs Anker 757 PowerHouse
Side-by-side on the specs that decide it — surge, capacity, runtime and price.
Both models' specs verified against manufacturer listings · Last updated
The short answer
EcoFlow RIVER 2 Max costs $700 less. Whether that gap is worth closing depends on what you need to run.
- Anker 757 PowerHouse holds 140% more energy (1229Wh vs 512Wh), so it runs the same load proportionally longer.
- Anker 757 PowerHouse has 1400W more surge headroom (2400W vs 1000W) — that decides whether a fridge, pump or AC compressor will actually start.
- EcoFlow RIVER 2 Max is 30.7 lb lighter (13.2 lb vs 43.9 lb).
Neither of these will start a sump pump or well pump — both surge below the ~3,400W those motors need. If home backup with pumps is your use case, look at higher-surge models instead of either of these.
Double the River 2's capacity and output for $100 more. The sweet spot of EcoFlow's small line for anyone eyeing the occasional small appliance.
Best for: Campers who want headroom over a pure device charger without the size of a 1kWh unit.
Where it falls short:
- Still not enough output for heaters or compressors
- 220W solar input is modest
Anker's older flagship, now a discount play. Solid and durable, but heavy for its capacity and outclassed on charge speed by the newer C-series.
Best for: Buyers who find it discounted below the newer Anker C1000.
Where it falls short:
- 43.9 lb for 1.2kWh is heavy
- 300W solar input is low
- Outclassed by the newer C1000
| Spec | EcoFlow RIVER 2 Max | Anker 757 PowerHouse |
|---|---|---|
| Price | $299 | $999 |
| Capacity | 512 Wh | 1229 Wh |
| Continuous output | 500 W | 1500 W |
| Surge output | 1000 W | 2400 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 3,000 | 3,000 |
| Weight (lighter wins) | 13.2 lb | 43.9 lb |
| Max solar | 220 W | 300 W |
| Recharge time (faster wins) | 1h | 1h 30m |
Runtime head-to-head
| Appliance | EcoFlow RIVER 2 Max | Anker 757 PowerHouse |
|---|---|---|
| Refrigerator | 7.3 hrs | 17.4 hrs |
| Mini fridge | 13.8 hrs | 33.2 hrs |
| Chest freezer | 5.4 hrs | 13.1 hrs |
| CPAP machine | 10.9 hrs | 26.1 hrs |
| Sump pump | ❌ | ❌ |