EcoFlow DELTA Pro Ultra vs BLUETTI AC500 + B300S
Whole-home backup titans
Our Verdict
BLUETTI AC500 + B300S wins overall
Score 34 vs 26 —
better value at $1.30/Wh
| Spec | DELTA Pro Ultra | AC500 + B300S |
|---|---|---|
| SunSee Score | 26 | 34★ |
| Capacity | 6,144 Wh★ | 3,072 Wh |
| AC Output | 7,200W★ | 5,000W |
| Surge Output | 14,400W★ | 10,000W |
| Solar Input | 5600W★ | 3000W |
| Weight | 85 kg | 60 kg★ |
| Cycle Life | 6,500★ | 3,500 |
| Charge Time | 2.5h | 2.5h |
| $/Wh | $0.94★ | $1.30 |
| Battery Type | LiFePO4 | LiFePO4 |
Choose EcoFlow DELTA Pro Ultra if:
- +Whole-home power
- +6500 cycle life
- +Expandable to 90kWh
- +Smart panel
Choose BLUETTI AC500 + B300S if:
- +5000W whole-home power
- +Expandable to 18kWh
- +Modular design
Not sure which size you need?
Our calculator tells you the exact capacity based on your appliances.
Size My SystemAffiliate Disclosure: Links may earn a commission at no extra cost to you. Learn more. Specs from official product pages as of July 2026.