How many watts does an RV water pump use?
Updated
Running watts
60 W
Starting watts
120 W
Energy per day
60 Wh
An RV water pump typically draws about 60 watts while running and up to 120 watts for a second or two when the motor starts. At about 1 h of use a day, that is roughly 60 Wh per day. These are typical values from generator wattage charts: the label on your own appliance (or its EnergyGuide sticker) gives the exact figure.
What size generator do I need for an RV water pump?
Plan for at least 144 W: 120 W to get through the start-up surge, plus a 20% margin so the generator never runs flat out. Of the common sizes, a 2,000 W generator is the smallest that fits.
| Generator | Can it run an RV water pump? |
|---|---|
| 2,000 W | Yes |
| 3,500 W | Yes |
| 5,000 W | Yes |
| 7,500 W | Yes |
| 10,000 W | Yes |
| 15,000 W | Yes |
How long will a power station run an RV water pump?
Running continuously at 60 W, assuming 85% of the battery is usable. The station's AC output must also handle the 120 W start-up surge.
| Battery capacity | Runtime |
|---|---|
| 1,000 Wh | about 14 h |
| 2,000 Wh | about 28 h |
| 3,600 Wh | about 2.1 days |
Running more than one appliance?
Starting surges don't add up the way running watts do. Pick everything you want to power to get your real number.
Open the RV Generator & Battery Size CalculatorFrequently asked questions
What size generator do I need to run an RV water pump?
At least 144 W: 120 W to cover the start-up surge, plus a 20% safety margin.
Can a 2,000 watt generator run an RV water pump?
Yes. 2,000 W covers its 120 W starting surge with room to spare.
Can a 3,500 watt generator run an RV water pump?
Yes. 3,500 W covers its 120 W starting surge with room to spare.
How long will a 1,000 Wh power station run an RV water pump?
About 14 h, assuming 85% usable capacity, as long as the station's AC output is rated for 120 W of surge.
Never run a generator indoors or in a garage: see the CPSC safety guide.