Bluetti AC500 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
EcoFlow DELTA mini costs $1400 less. Whether that gap is worth closing depends on what you need to run.
- Bluetti AC500 holds 248% more energy (3072Wh vs 882Wh), so it runs the same load proportionally longer.
- Bluetti AC500 has 7900W more surge headroom (10000W vs 2100W) — that decides whether a fridge, pump or AC compressor will actually start.
- EcoFlow DELTA mini is 42.5 lb lighter (23.6 lb vs 66.1 lb).
- Bluetti AC500 uses LiFePO4 while the other uses NMC — roughly double the usable cycle life.
- Bluetti AC500 is rated for 3,500 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.
A modular home-backup system, not a portable unit — the AC500 has no internal battery at all until you add B300K packs.
Best for: Serious home-backup builds where you're designing a system, not buying an appliance.
Where it falls short:
- Requires separate battery packs to function at all — budget accordingly
- Total system cost climbs fast
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 AC500 | EcoFlow DELTA mini |
|---|---|---|
| Price | $1999 | $599 |
| Capacity | 3072 Wh | 882 Wh |
| Continuous output | 5000 W | 1400 W |
| Surge output | 10000 W | 2100 W |
| Battery | LiFePO4 | NMC |
| Rated cycles | 3,500 | 800 |
| Weight (lighter wins) | 66.1 lb | 23.6 lb |
| Max solar | 3000 W | 300 W |
| Recharge time (faster wins) | 1h 45m | 1h 36m |
Runtime head-to-head
| Appliance | Bluetti AC500 | EcoFlow DELTA mini |
|---|---|---|
| Refrigerator | 43.5 hrs | 12.5 hrs |
| Mini fridge | 82.9 hrs | 23.8 hrs |
| Chest freezer | 32.6 hrs | 9.4 hrs |
| CPAP machine | 65.3 hrs | 18.7 hrs |
| Sump pump | 3.3 hrs | ❌ |