EcoFlow DELTA 3 Max vs Bluetti AC70
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 AC70 costs $600 less. Whether that gap is worth closing depends on what you need to run.
- EcoFlow DELTA 3 Max holds 167% more energy (2048Wh vs 768Wh), so it runs the same load proportionally longer.
- EcoFlow DELTA 3 Max has 2800W more surge headroom (4800W vs 2000W) — that decides whether a fridge, pump or AC compressor will actually start.
- Bluetti AC70 is 33.1 lb lighter (22 lb vs 55.1 lb).
- EcoFlow DELTA 3 Max is rated for 4,000 cycles vs 3,000 — meaningful if you cycle it daily.
EcoFlow DELTA 3 Max
The value leader in the 2kWh class. Same 4800W surge as the DELTA 2 Max at $500 less, with 1000 more cycles.
Best for: Home backup buyers who want compressor-starting surge without paying flagship prices.
Where it falls short:
- 55 lb is a two-hand lift
- Only marginally lighter than heavier rivals
Bluetti AC70
768Wh with 1000W output at $499 — it does what the EcoFlow River 2 Pro does, with more output and more weight.
Best for: Campers who need to run a small fridge, not just charge devices.
Where it falls short:
- 22 lb — 5 lb heavier than the River 2 Pro
- Not expandable
| Spec | EcoFlow DELTA 3 Max | Bluetti AC70 |
|---|---|---|
| Price | $1099 | $499 |
| Capacity | 2048 Wh | 768 Wh |
| Continuous output | 2400 W | 1000 W |
| Surge output | 4800 W | 2000 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 4,000 | 3,000 |
| Weight (lighter wins) | 55.1 lb | 22 lb |
| Max solar | 1000 W | 500 W |
| Recharge time (faster wins) | 1h 22m | 1h 15m |
Runtime head-to-head
| Appliance | EcoFlow DELTA 3 Max | Bluetti AC70 |
|---|---|---|
| Refrigerator | 29.0 hrs | 10.9 hrs |
| Mini fridge | 55.3 hrs | 20.7 hrs |
| Chest freezer | 21.8 hrs | 8.2 hrs |
| CPAP machine | 43.5 hrs | 16.3 hrs |
| Sump pump | 2.2 hrs | ❌ |