EcoFlow DELTA Pro 3 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
Bluetti AC500 costs $1700 less. Whether that gap is worth closing depends on what you need to run.
- EcoFlow DELTA Pro 3 holds 33% more energy (4096Wh vs 3072Wh), so it runs the same load proportionally longer.
- Bluetti AC500 has 2000W more surge headroom (10000W vs 8000W) — that decides whether a fridge, pump or AC compressor will actually start.
- Bluetti AC500 is 46.9 lb lighter (66.1 lb vs 113 lb).
- EcoFlow DELTA Pro 3 is rated for 4,000 cycles vs 3,500 — meaningful if you cycle it daily.
EcoFlow DELTA Pro 3
The most complete large unit here. 4096Wh, 4000W, 8000W surge and 2600W of solar — it does everything the F3800 does with less weight.
Best for: Whole-home backup buyers who want maximum solar recharge speed.
Where it falls short:
- $3,699 is a serious investment
- Overkill unless you're backing up a whole home
Bluetti AC500
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 Pro 3 | Bluetti AC500 |
|---|---|---|
| Price | $3699 | $1999 |
| Capacity | 4096 Wh | 3072 Wh |
| Continuous output | 4000 W | 5000 W |
| Surge output | 8000 W | 10000 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 4,000 | 3,500 |
| Weight (lighter wins) | 113 lb | 66.1 lb |
| Max solar | 2600 W | 3000 W |
| Recharge time (faster wins) | 1h 40m | 1h 45m |
Runtime head-to-head
| Appliance | EcoFlow DELTA Pro 3 | Bluetti AC500 |
|---|---|---|
| Refrigerator | 58.0 hrs | 43.5 hrs |
| Mini fridge | 110.5 hrs | 82.9 hrs |
| Chest freezer | 43.5 hrs | 32.6 hrs |
| CPAP machine | 87.0 hrs | 65.3 hrs |
| Sump pump | 4.4 hrs | 3.3 hrs |