EcoFlow RIVER 2 Max vs Allpowers R4000
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 $2000 less. Whether that gap is worth closing depends on what you need to run.
- Allpowers R4000 holds 575% more energy (3456Wh vs 512Wh), so it runs the same load proportionally longer.
- Allpowers R4000 has 5000W more surge headroom (6000W vs 1000W) — that decides whether a fridge, pump or AC compressor will actually start.
- EcoFlow RIVER 2 Max is 92.8 lb lighter (13.2 lb vs 106 lb).
- Allpowers R4000 is rated for 3,500 cycles vs 3,000 — meaningful if you cycle it daily.
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
A large expandable unit that undercuts the EcoFlow Delta Pro 3 on price while matching its 4,000W output — the trade is a less established support network.
Best for: Whole-home backup buyers prioritising price per watt over brand.
Where it falls short:
- 106 lb
- Brand support and resale trail the big names
| Spec | EcoFlow RIVER 2 Max | Allpowers R4000 |
|---|---|---|
| Price | $299 | $2299 |
| Capacity | 512 Wh | 3456 Wh |
| Continuous output | 500 W | 4000 W |
| Surge output | 1000 W | 6000 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 3,000 | 3,500 |
| Weight (lighter wins) | 13.2 lb | 106 lb |
| Max solar | 220 W | 2000 W |
| Recharge time (faster wins) | 1h | 1h 30m |
Runtime head-to-head
| Appliance | EcoFlow RIVER 2 Max | Allpowers R4000 |
|---|---|---|
| Refrigerator | 7.3 hrs | 49.0 hrs |
| Mini fridge | 13.8 hrs | 93.3 hrs |
| Chest freezer | 5.4 hrs | 36.7 hrs |
| CPAP machine | 10.9 hrs | 73.4 hrs |
| Sump pump | ❌ | 3.7 hrs |