EcoFlow DELTA 3 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 $150 less. Whether that gap is worth closing depends on what you need to run.
- EcoFlow DELTA 3 holds 33% more energy (1024Wh vs 768Wh), so it runs the same load proportionally longer.
- EcoFlow DELTA 3 has 1600W more surge headroom (3600W vs 2000W) — that decides whether a fridge, pump or AC compressor will actually start.
- Bluetti AC70 is 6.7 lb lighter (22 lb vs 28.7 lb).
- EcoFlow DELTA 3 is rated for 4,000 cycles vs 3,000 — meaningful if you cycle it daily.
EcoFlow DELTA 3
The 1kWh class got a serious upgrade here. 3600W surge at $649 beats the older DELTA 2 on every axis that matters.
Best for: Anyone about to buy a DELTA 2 — this is the same money for materially better specs.
Where it falls short:
- Still only 1024Wh
- Solar input unchanged at 500W
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 | Bluetti AC70 |
|---|---|---|
| Price | $649 | $499 |
| Capacity | 1024 Wh | 768 Wh |
| Continuous output | 1800 W | 1000 W |
| Surge output | 3600 W | 2000 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 4,000 | 3,000 |
| Weight (lighter wins) | 28.7 lb | 22 lb |
| Max solar | 500 W | 500 W |
| Recharge time (faster wins) | 56 min | 1h 15m |
Runtime head-to-head
| Appliance | EcoFlow DELTA 3 | Bluetti AC70 |
|---|---|---|
| Refrigerator | 14.5 hrs | 10.9 hrs |
| Mini fridge | 27.6 hrs | 20.7 hrs |
| Chest freezer | 10.9 hrs | 8.2 hrs |
| CPAP machine | 21.8 hrs | 16.3 hrs |
| Sump pump | 1.1 hrs | ❌ |