EcoFlow RIVER 2: runtime & specs
256 Wh · 300 W continuous AC · 110 W max solar input · LFP (LiFePO4). Specs below are the manufacturer's published figures — continuous and surge watts are separate numbers here, because they are separate numbers in reality.
Manufacturer specifications
| Capacity | 256 Wh |
|---|---|
| AC output (continuous) | 300 W |
| AC output (surge) | 600 W |
| X-Boost | 600 W — resistive loads only; not used in our start check or sizing math |
| Maximum solar input | 110 W |
| Solar input voltage range | 11-30V |
| Battery chemistry | LFP (LiFePO4) |
| Cycle life | 3,000 cycles to 80% capacity |
| AC charging input (max) | 360 W |
| Weight | 7.7 lbs |
Source: manufacturer product page · pulled 2026-10-19. If a row says "not published", the manufacturer doesn't publish that figure in the source we retrieved — we leave it blank rather than guess.
What it runs, and for how long
Estimates use our published formula — capacity × 0.85 ÷ load, duty cycle applied to cycling loads, and a start check against the surge rating (methodology). Loads that fail the start check are marked, not given a fake runtime.
| Load | Estimated runtime |
|---|
Try your own load
EcoFlow RIVER 2 questions
How long will the EcoFlow RIVER 2 run a refrigerator?
No — not a full-size fridge by Generac's worksheet figures. A fridge draws 700 W while its compressor runs, above this model's 300 W continuous rating, so it cannot run one at all. Smaller loads are fine.
How long will it run a CPAP?
About 5.4 hours at 40 W — a typical CPAP without a heated humidifier — or roughly 0.7 nights at 8 hours a night. With a heated humidifier (~90 W) expect about 2.4 hours. That's device runtime math only; see the CPAP calculator for your device's actual wattage.
How long does it take to recharge from solar?
With 400 W of panels, the EcoFlow RIVER 2 needs about 3.0 hours of full sun for a full charge after the 0.78 real-world derate — capped by the station's 110 W maximum solar input. Try other panel sizes in the solar charging calculator.
WattLong is reader-supported. Some links on this site are affiliate links: if you buy through them, we may earn a commission at no extra cost to you. See our affiliate disclosure. All results are estimates — verify with the manufacturer and a licensed electrician before relying on them.