BatteryRank scores the EcoFlow DELTA Pro 3 higher overall — 74 vs 70, though the other unit leads on trust.
- Best for Home backup: EcoFlow DELTA Pro 3
- Best for CPAP & bedroom: Bluetti Apex 300
- Best for Camping & RV: Bluetti Apex 300
How they score
Computed from sourced data with a published, price-independent formula. Scores are relative to each model's size class.
Capacity truth
The watt-hours on the box aren't what reaches your devices. Same scale, both units.
The marketing number — total cell capacity.
~2,550-2,580 Wh delivered (Trusted Reviews, ~92-93.5% at load) · 7% below the label
The marketing number — total cell capacity.
3790Wh usable at >93% efficiency (OutdoorGearLab) vs 4096 rated · 7% below the label
Key specs, side by side
| Spec | Bluetti Apex 300 | EcoFlow DELTA Pro 3 |
|---|---|---|
| Usable capacity | 2,764.8 Wh | 4,096 Wh |
| Continuous power output | 3,840 W | 4,000 W |
| Surge power output | 7,680 W | 8,000 W |
| Max solar input | 2,400 W | 2,600 W |
| Weight | 38 kg | 51.5 kg |
| Rated cycle life | 6,000 cycles | 4,000 cycles |
Manufacturer-claimed unless marked verified (FCC/UL/DOE/lab). Hover any figure for its source.
Price & fair-price verdict
Each verdict compares today's price against that model's own tracked history — never MSRP theater.
Where these rank
- Bluetti Apex 300 #3 XL / home backup in Best Portable Power Stations
- EcoFlow DELTA Pro 3 #2 XL / home backup in Best Portable Power Stations · #3 of 8 in Best for Home Backup