How long will an EcoFlow RIVER Pro run an electric car (3-pin "granny" charger)?
It will not. An electric car (3-pin "granny" charger) draws 2,300 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.
Not a real use case: even a 5 kWh station adds only around 10 miles of range and empties itself doing it. See the guide before you try.
The numbers
| Setup | Average draw | Cautious | Typical | Best case |
|---|---|---|---|---|
| 1 × electric car (3-pin "granny" charger), UK 230 V | 2,310 W | — | — | — |
| 2 × electric car (3-pin "granny" charger), UK 230 V | 4,610 W | — | — | — |
| 1 × electric car (3-pin "granny" charger), US 120 V | 1,410 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 76,285 Wh of rated capacity — 106× this station.
- Start-up: the electric car (3-pin "granny" charger) asks for 2,300 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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What changes the answer
| If instead… | Typical runtime | Change |
|---|---|---|
| The pack is two years old | — | -5% |
| The pack is five years old | — | -19% |
| It is −10 °C outside | — | -19% |
| You run it flat, no reserve | — | +14% |
| You keep 20% back | — | -10% |
If you need it to run longer
These run an electric car (3-pin "granny" charger) for at least twice as long as the EcoFlow RIVER Pro does, cheapest first.
| Station | Wh | Typical | Indicative price |
|---|---|---|---|
| ALLPOWERS S2000 Pro | 1,451 | 26 min | £899 / $549 |
| Bluetti AC240 | 1,536 | 29 min | £1,099 / $999 |
| EcoFlow DELTA 2 Max | 2,048 | 38 min | £1,199 / $1,399 |
| EcoFlow DELTA 3 Max | 2,048 | 38 min | £1,199 / $1,499 |
The cheapest step up: ALLPOWERS S2000 Pro
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 an electric car (3-pin "granny" charger) for a useful length of time.
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