EcoFlow RIVER 2 Pro vs EcoFlow DELTA 3 Ultra Plus
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
EcoFlow RIVER 2 Pro costs $1400 less. Whether that gap is worth closing depends on what you need to run.
- EcoFlow DELTA 3 Ultra Plus holds 300% more energy (3072Wh vs 768Wh), so it runs the same load proportionally longer.
- EcoFlow DELTA 3 Ultra Plus has 5600W more surge headroom (7200W vs 1600W) — that decides whether a fridge, pump or AC compressor will actually start.
- EcoFlow RIVER 2 Pro is 68.5 lb lighter (17 lb vs 85.5 lb).
- EcoFlow DELTA 3 Ultra Plus is rated for 4,000 cycles vs 3,000 — meaningful if you cycle it daily.
The one you actually carry. At 17 lb it is light enough for one hand, yet unlike the true pocket units it has the 800W of output needed to run small appliances rather than just charge devices.
Best for: Backpackers, photographers and festival-goers who care about weight above all.
Where it falls short:
- 800W output limits you to electronics and small loads
- 220W solar input means slow off-grid top-ups
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
| Spec | EcoFlow RIVER 2 Pro | EcoFlow DELTA 3 Ultra Plus |
|---|---|---|
| Price | $599 | $1999 |
| Capacity | 768 Wh | 3072 Wh |
| Continuous output | 800 W | 3600 W |
| Surge output | 1600 W | 7200 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 3,000 | 4,000 |
| Weight (lighter wins) | 17 lb | 85.5 lb |
| Max solar | 220 W | 1600 W |
| Recharge time (faster wins) | 1h 10m | 1h 30m |
Runtime head-to-head
| Appliance | EcoFlow RIVER 2 Pro | EcoFlow DELTA 3 Ultra Plus |
|---|---|---|
| Refrigerator | 10.9 hrs | 43.5 hrs |
| Mini fridge | 20.7 hrs | 82.9 hrs |
| Chest freezer | 8.2 hrs | 32.6 hrs |
| CPAP machine | 16.3 hrs | 65.3 hrs |
| Sump pump | ❌ | 3.3 hrs |