EcoFlow DELTA 2 Max vs Bluetti AC500
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 2 Max costs $400 less. Whether that gap is worth closing depends on what you need to run.
- Bluetti AC500 holds 50% more energy (3072Wh vs 2048Wh), so it runs the same load proportionally longer.
- Bluetti AC500 has 5200W more surge headroom (10000W vs 4800W) — that decides whether a fridge, pump or AC compressor will actually start.
- EcoFlow DELTA 2 Max is 16.1 lb lighter (50 lb vs 66.1 lb).
- Bluetti AC500 is rated for 3,500 cycles vs 3,000 — meaningful if you cycle it daily.
The surge sleeper. At 4800W it starts loads that stations twice its price can't — and most spec sheets bury that number behind the X-Boost figure.
Best for: Home backup where something with a compressor — fridge, freezer, window AC — has to start reliably.
Where it falls short:
- 50 lb is heavy for its capacity
- Marketing leads with the 3400W X-Boost number, which understates it
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
| Spec | EcoFlow DELTA 2 Max | Bluetti AC500 |
|---|---|---|
| Price | $1599 | $1999 |
| Capacity | 2048 Wh | 3072 Wh |
| Continuous output | 2400 W | 5000 W |
| Surge output | 4800 W | 10000 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 3,000 | 3,500 |
| Weight (lighter wins) | 50 lb | 66.1 lb |
| Max solar | 1000 W | 3000 W |
| Recharge time (faster wins) | 1h 30m | 1h 45m |
Runtime head-to-head
| Appliance | EcoFlow DELTA 2 Max | Bluetti AC500 |
|---|---|---|
| Refrigerator | 29.0 hrs | 43.5 hrs |
| Mini fridge | 55.3 hrs | 82.9 hrs |
| Chest freezer | 21.8 hrs | 32.6 hrs |
| CPAP machine | 43.5 hrs | 65.3 hrs |
| Sump pump | 2.2 hrs | 3.3 hrs |