EcoFlow RIVER 2 vs Anker 555 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 costs $500 less. Whether that gap is worth closing depends on what you need to run.
- Anker 555 PowerHouse holds 300% more energy (1024Wh vs 256Wh), so it runs the same load proportionally longer.
- Anker 555 PowerHouse has 900W more surge headroom (1500W vs 600W) — that decides whether a fridge, pump or AC compressor will actually start.
- EcoFlow RIVER 2 is 22.2 lb lighter (7.7 lb vs 29.9 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.
The cheapest way into LiFePO4. 256Wh is a device charger, but at under $200 with a 60-minute recharge it's hard to argue with.
Best for: Budget campers who just need to keep phones, cameras and a laptop alive.
Where it falls short:
- 300W output runs devices only
- 256Wh is a single evening of real use
A 1kWh unit whose 1,000W output and slow charging show its age — the newer, cheaper Anker C1000 beats it on nearly every axis.
Best for: Only worth it steeply discounted against the C1000.
Where it falls short:
- 1,500W surge is low
- 200W solar input and a slow 138-minute recharge
| Spec | EcoFlow RIVER 2 | Anker 555 PowerHouse |
|---|---|---|
| Price | $199 | $699 |
| Capacity | 256 Wh | 1024 Wh |
| Continuous output | 300 W | 1000 W |
| Surge output | 600 W | 1500 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 3,000 | 3,000 |
| Weight (lighter wins) | 7.7 lb | 29.9 lb |
| Max solar | 110 W | 200 W |
| Recharge time (faster wins) | 1h | 2h 18m |
Runtime head-to-head
| Appliance | EcoFlow RIVER 2 | Anker 555 PowerHouse |
|---|---|---|
| Refrigerator | ❌ | 14.5 hrs |
| Mini fridge | 6.9 hrs | 27.6 hrs |
| Chest freezer | ❌ | 10.9 hrs |
| CPAP machine | 5.4 hrs | 21.8 hrs |
| Sump pump | ❌ | ❌ |