EcoFlow RIVER 2 Max vs Ampace Andes 1500
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.
- Ampace Andes 1500 holds 186% more energy (1462Wh vs 512Wh), so it runs the same load proportionally longer.
- Ampace Andes 1500 has 2600W more surge headroom (3600W vs 1000W) — that decides whether a fridge, pump or AC compressor will actually start.
- EcoFlow RIVER 2 Max is 23.6 lb lighter (13.2 lb vs 36.8 lb).
EcoFlow RIVER 2 Max
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
Ampace Andes 1500
Backed by an Amperex/CATL cell pedigree, the Andes 1500 stands out on charge speed — 0-80% in well under an hour — and a light 36.8 lb for 1.5kWh.
Best for: Buyers who prize fast charging and low weight at 1.5kWh.
Where it falls short:
- Newer brand with a thinner track record
- Not expandable
| Spec | EcoFlow RIVER 2 Max | Ampace Andes 1500 |
|---|---|---|
| Price | $299 | $999 |
| Capacity | 512 Wh | 1462 Wh |
| Continuous output | 500 W | 2000 W |
| Surge output | 1000 W | 3600 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 3,000 | 3,000 |
| Weight (lighter wins) | 13.2 lb | 36.8 lb |
| Max solar | 220 W | 1000 W |
| Recharge time (faster wins) | 1h | 55 min |
Runtime head-to-head
| Appliance | EcoFlow RIVER 2 Max | Ampace Andes 1500 |
|---|---|---|
| Refrigerator | 7.3 hrs | 20.7 hrs |
| Mini fridge | 13.8 hrs | 39.5 hrs |
| Chest freezer | 5.4 hrs | 15.5 hrs |
| CPAP machine | 10.9 hrs | 31.1 hrs |
| Sump pump | ❌ | 1.6 hrs |