EcoFlow RIVER 2 Max vs Bluetti AC2A
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
Bluetti AC2A costs $100 less. Whether that gap is worth closing depends on what you need to run.
- EcoFlow RIVER 2 Max holds 151% more energy (512Wh vs 204Wh), so it runs the same load proportionally longer.
- EcoFlow RIVER 2 Max has 400W more surge headroom (1000W vs 600W) — that decides whether a fridge, pump or AC compressor will actually start.
- Bluetti AC2A is 5.3 lb lighter (7.9 lb vs 13.2 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
One of the cheapest LiFePO4 stations on the market. 204Wh is tiny, but a 200W solar input that outpaces the capacity makes it a surprisingly capable little off-grid trickle unit.
Best for: Ultralight campers who recharge from a panel daily.
Where it falls short:
- 204Wh is genuinely small
- 300W output is device-only
| Spec | EcoFlow RIVER 2 Max | Bluetti AC2A |
|---|---|---|
| Price | $299 | $199 |
| Capacity | 512 Wh | 204 Wh |
| Continuous output | 500 W | 300 W |
| Surge output | 1000 W | 600 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 3,000 | 3,000 |
| Weight (lighter wins) | 13.2 lb | 7.9 lb |
| Max solar | 220 W | 200 W |
| Recharge time (faster wins) | 1h | 1h 30m |
Runtime head-to-head
| Appliance | EcoFlow RIVER 2 Max | Bluetti AC2A |
|---|---|---|
| Refrigerator | 7.3 hrs | ❌ |
| Mini fridge | 13.8 hrs | 5.5 hrs |
| Chest freezer | 5.4 hrs | ❌ |
| CPAP machine | 10.9 hrs | 4.3 hrs |
| Sump pump | ❌ | ❌ |