EcoFlow RIVER 2 Pro 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 Pro costs $100 less. Whether that gap is worth closing depends on what you need to run.
- Anker 555 PowerHouse holds 33% more energy (1024Wh vs 768Wh), so it runs the same load proportionally longer.
- EcoFlow RIVER 2 Pro has 100W more surge headroom (1600W vs 1500W) — that decides whether a fridge, pump or AC compressor will actually start.
- EcoFlow RIVER 2 Pro is 12.9 lb lighter (17 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 one you actually carry. At 17 lb it is light enough for one hand, yet unlike the true pocket units it has the 800W of output needed to run small appliances rather than just charge devices.
Best for: Backpackers, photographers and festival-goers who care about weight above all.
Where it falls short:
- 800W output limits you to electronics and small loads
- 220W solar input means slow off-grid top-ups
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 Pro | Anker 555 PowerHouse |
|---|---|---|
| Price | $599 | $699 |
| Capacity | 768 Wh | 1024 Wh |
| Continuous output | 800 W | 1000 W |
| Surge output | 1600 W | 1500 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 3,000 | 3,000 |
| Weight (lighter wins) | 17 lb | 29.9 lb |
| Max solar | 220 W | 200 W |
| Recharge time (faster wins) | 1h 10m | 2h 18m |
Runtime head-to-head
| Appliance | EcoFlow RIVER 2 Pro | Anker 555 PowerHouse |
|---|---|---|
| Refrigerator | 10.9 hrs | 14.5 hrs |
| Mini fridge | 20.7 hrs | 27.6 hrs |
| Chest freezer | 8.2 hrs | 10.9 hrs |
| CPAP machine | 16.3 hrs | 21.8 hrs |
| Sump pump | ❌ | ❌ |