EcoFlow DELTA 3 Ultra vs Bluetti Apex 300
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 Apex 300 costs $200 less. Whether that gap is worth closing depends on what you need to run.
- EcoFlow DELTA 3 Ultra holds 11% more energy (3072Wh vs 2764Wh), so it runs the same load proportionally longer.
- Bluetti Apex 300 has 480W more surge headroom (7680W vs 7200W) — that decides whether a fridge, pump or AC compressor will actually start.
- Bluetti Apex 300 is 4.4 lb lighter (79.4 lb vs 83.8 lb).
- Bluetti Apex 300 is rated for 6,000 cycles vs 4,000 — meaningful if you cycle it daily.
EcoFlow DELTA 3 Ultra
3kWh with 7200W surge at $1799 — this is whole-home territory at a mid-range price. The catch is the 800W solar input.
Best for: Grid-tied home backup where you recharge from the wall, not the sun.
Where it falls short:
- 800W solar input is low for 3kWh — slow off-grid refills
- 83.8 lb
Bluetti Apex 300
6000 cycles at 2764Wh — the best long-term cost-per-kWh in this list if you cycle daily. Bluetti's answer to the Elite 200 V2 at scale.
Best for: Off-grid solar setups where daily cycling makes lifespan the dominant cost.
Where it falls short:
- 79.4 lb
- Newer product with limited long-term field data
| Spec | EcoFlow DELTA 3 Ultra | Bluetti Apex 300 |
|---|---|---|
| Price | $1799 | $1599 |
| Capacity | 3072 Wh | 2764 Wh |
| Continuous output | 3600 W | 3840 W |
| Surge output | 7200 W | 7680 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 4,000 | 6,000 |
| Weight (lighter wins) | 83.8 lb | 79.4 lb |
| Max solar | 800 W | 2600 W |
| Recharge time (faster wins) | 1h 30m | 1h 30m |
Runtime head-to-head
| Appliance | EcoFlow DELTA 3 Ultra | Bluetti Apex 300 |
|---|---|---|
| Refrigerator | 43.5 hrs | 39.2 hrs |
| Mini fridge | 82.9 hrs | 74.6 hrs |
| Chest freezer | 32.6 hrs | 29.4 hrs |
| CPAP machine | 65.3 hrs | 58.7 hrs |
| Sump pump | 3.3 hrs | 2.9 hrs |