EcoFlow DELTA 3 Plus vs BLUETTI AC500 + B300S
Premium 4kWh+ systems
Our Verdict
EcoFlow DELTA 3 Plus wins overall
Score 54 vs 34 —
better value at $0.61/Wh
| Spec | DELTA 3 Plus | AC500 + B300S |
|---|---|---|
| SunSee Score | 54★ | 34 |
| Capacity | 4,096 Wh★ | 3,072 Wh |
| AC Output | 2,400W | 5,000W★ |
| Surge Output | 4,800W | 10,000W★ |
| Solar Input | 1600W | 3000W★ |
| Weight | 42.5 kg★ | 60 kg |
| Cycle Life | 4,000★ | 3,500 |
| Charge Time | 1.5h★ | 2.5h |
| $/Wh | $0.61★ | $1.30 |
| Battery Type | LiFePO4 | LiFePO4 |
Choose EcoFlow DELTA 3 Plus if:
- +4kWh capacity
- +4000 cycle life
- +Fast solar charging
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.