EcoFlow DELTA 3 Ultra Plus vs Fossibot F2400
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
Fossibot F2400 costs $1100 less. Whether that gap is worth closing depends on what you need to run.
- EcoFlow DELTA 3 Ultra Plus holds 50% more energy (3072Wh vs 2048Wh), so it runs the same load proportionally longer.
- EcoFlow DELTA 3 Ultra Plus has 2400W more surge headroom (7200W vs 4800W) — that decides whether a fridge, pump or AC compressor will actually start.
- Fossibot F2400 is 37.0 lb lighter (48.5 lb vs 85.5 lb).
- EcoFlow DELTA 3 Ultra Plus is rated for 4,000 cycles vs 3,500 — meaningful if you cycle it daily.
EcoFlow DELTA 3 Ultra Plus
The Ultra's solar problem solved: same everything, but 1600W of PV input instead of 800W. That doubles your off-grid refill speed for $200.
Best for: Off-grid cabins and van builds that actually recharge from panels.
Where it falls short:
- $1999 approaches DELTA Pro 3 pricing
- 85.5 lb
Fossibot F2400
A value-brand 2kWh that undercuts the majors sharply while matching them on the specs that matter — 2,400W output and a strong 4,800W surge.
Best for: Bargain hunters who want high surge and 2kWh for the least money.
Where it falls short:
- 500W solar input is low for 2kWh
- Support network trails the majors
| Spec | EcoFlow DELTA 3 Ultra Plus | Fossibot F2400 |
|---|---|---|
| Price | $1999 | $899 |
| Capacity | 3072 Wh | 2048 Wh |
| Continuous output | 3600 W | 2200 W |
| Surge output | 7200 W | 4800 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 4,000 | 3,500 |
| Weight (lighter wins) | 85.5 lb | 48.5 lb |
| Max solar | 1600 W | 500 W |
| Recharge time (faster wins) | 1h 30m | 1h 30m |
Runtime head-to-head
| Appliance | EcoFlow DELTA 3 Ultra Plus | Fossibot F2400 |
|---|---|---|
| Refrigerator | 43.5 hrs | 29.0 hrs |
| Mini fridge | 82.9 hrs | 55.3 hrs |
| Chest freezer | 32.6 hrs | 21.8 hrs |
| CPAP machine | 65.3 hrs | 43.5 hrs |
| Sump pump | 3.3 hrs | 2.2 hrs |