Bluetti AC70 vs EcoFlow DELTA mini
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 $100 less. Whether that gap is worth closing depends on what you need to run.
- EcoFlow DELTA mini holds 15% more energy (882Wh vs 768Wh), so it runs the same load proportionally longer.
- EcoFlow DELTA mini has 100W more surge headroom (2100W vs 2000W) — that decides whether a fridge, pump or AC compressor will actually start.
- Bluetti AC70 is 1.6 lb lighter (22 lb vs 23.6 lb).
- Bluetti AC70 uses LiFePO4 while the other uses NMC — roughly double the usable cycle life.
- Bluetti AC70 is rated for 3,000 cycles vs 800 — meaningful if you cycle it daily.
If you plan to cycle the battery daily, think twice about the EcoFlow DELTA mini. Its NMC cells are rated for 800 cycles against the LiFePO4 rival's longer life — over years of regular use that's the more expensive unit, whatever the sticker says.
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
A compact NMC unit with a surprisingly strong 1,400W output for its size — but the 800-cycle battery means it won't age like the LiFePO4 field.
Best for: Buyers who want strong output in a light unit and won’t cycle it daily.
Where it falls short:
- NMC — ~800 cycles
- 2-year warranty, 300W solar input
| Spec | Bluetti AC70 | EcoFlow DELTA mini |
|---|---|---|
| Price | $499 | $599 |
| Capacity | 768 Wh | 882 Wh |
| Continuous output | 1000 W | 1400 W |
| Surge output | 2000 W | 2100 W |
| Battery | LiFePO4 | NMC |
| Rated cycles | 3,000 | 800 |
| Weight (lighter wins) | 22 lb | 23.6 lb |
| Max solar | 500 W | 300 W |
| Recharge time (faster wins) | 1h 15m | 1h 36m |
Runtime head-to-head
| Appliance | Bluetti AC70 | EcoFlow DELTA mini |
|---|---|---|
| Refrigerator | 10.9 hrs | 12.5 hrs |
| Mini fridge | 20.7 hrs | 23.8 hrs |
| Chest freezer | 8.2 hrs | 9.4 hrs |
| CPAP machine | 16.3 hrs | 18.7 hrs |
| Sump pump | ❌ | ❌ |