How long will an EcoFlow RIVER Pro run a fan heater?
It will not. A fan heater draws 2,000 W and the EcoFlow RIVER Pro's inverter is rated at 600 W, so the station will refuse the load rather than run it slowly. Capacity is irrelevant here — you need a bigger inverter, not a bigger battery.
No thermal mass, so no cycling: it draws full power the whole time it is on.
The numbers
| Setup | Average draw | Cautious | Typical | Best case |
|---|---|---|---|---|
| 1 × fan heater, UK 230 V | 2,010 W | — | — | — |
| 2 × fan heater, UK 230 V | 4,010 W | — | — | — |
| 1 × fan heater, US 120 V | 1,510 W | — | — | — |
- Usable energy: 496 Wh of the 720 Wh on the box, after chemistry, inverter losses and the reserve.
- To keep it going for a full 24 hours you would need about 66,378 Wh of rated capacity — 92.2× this station.
- Start-up: the fan heater asks for 2,000 W at switch-on against this station's 1,200 W peak — not enough.
Buy the EcoFlow RIVER Pro
Where to buy
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If this is for a power cut
Heating is what a battery does worst. In a power cut, warming people rather than rooms goes much further, and none of this needs a socket.
Without a power station: a 20,000 mAh power bank runs a USB heated throw for about 7 h 24 min. See the power bank numbers.
Hot water bottle and a vacuum flask. Boil water while you still can, keep it hot in a flask, and refill the bottle through the night.
Look for: A bottle made to BS 1970 in the UK, and a flask of a litre or more.
Hand warmers. Air-activated packs give hours of heat with no power at all, and a pocketful helps children and older relatives.
Look for: Long-duration packs, and the expiry date on bulk boxes.
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More: How to keep warm in a power cut, and the power cut essentials list (US edition).
What changes the answer
| If instead… | Typical runtime | Change |
|---|---|---|
| The pack is two years old | — | -8% |
| The pack is five years old | — | -20% |
| It is −10 °C outside | — | -20% |
| You run it flat, no reserve | — | +8% |
| You keep 20% back | — | -12% |
If you need it to run longer
These run a fan heater for at least twice as long as the EcoFlow RIVER Pro does, cheapest first.
| Station | Wh | Typical | Indicative price |
|---|---|---|---|
| Jackery Explorer 2000 v2 | 2,042 | 44 min | £849 / $999 |
| ALLPOWERS S2000 Pro | 1,451 | 30 min | £899 / $549 |
| OUKITEL P2001 Ultimate | 2,000 | 43 min | £999 / $1,099 |
| Bluetti AC240 | 1,536 | 33 min | £1,099 / $999 |
The cheapest step up: Jackery Explorer 2000 v2
Amazon and approved-programme links are affiliate links; the site may earn a commission at no extra cost to you. Links marked “official site” are untracked. Prices and stock change constantly — check before you buy.
Smaller options that still work
Nothing smaller than the EcoFlow RIVER Pro runs a fan heater for a useful length of time.
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