What size power station for a washing machine?
It needs a station with at least 1,000 W of continuous output and a surge rating of at least 1,200 W to start it. At the default 85% efficiency it takes about 1,176 Wh of rated capacity for its typical 1 h a day, and 9,412 Wh for 8 hours of running. 43 of the 54 power stations in the Enough Watts data set can power it. The smallest one that keeps it going for 8 hours of running is the EcoFlow DELTA Pro Ultra X (12,288 Wh).
Updated
The short answer
1,000W
Continuous output
1,200W
Surge to start it
1,176Wh
Capacity for its typical 1 h a day
9,412Wh
Capacity for 8 hours of running
43 of 54
Stations that power it
Watts
Typical figures for this type, from the sources at the foot of this page. Watts vary by model and age. Check the label on your own appliance and enter it for an exact answer.
- Running, typical
- 1,000 W
- Running, low to high
- 500 W to 1,320 W
- Starting
- 1,200 W1,000 W to 2,300 W, 1.2 times running
- Typical use a day
- 1 hhours the motor actually runs
- Average draw while on
- 1,000 W
- Voltage
- 120 V
- Assumes the motor runs the whole time; real use is often less.
Explained in: Watts vs watt hours, explained, How to read an appliance label for watts and Starting watts explained.
The math
Worked with the typical figure, as the calculator does it.
- Output1,000 W running, so the station's continuous output must be at least 1,000 W.
- Surge1,200 W to start, so its surge rating must be at least 1,200 W.
- Average draw1,000 W: the running watts count for every hour it is on, as if the motor never paused.
- A typical day1,000 W × 1 h = 1,000 Wh a day.
- Typical 1 h a day1,000 W × 1 h = 1,000 Wh usable, ÷ 0.85 = 1,176 Wh of rated capacity.
- 8 hours of running1,000 W × 8 h = 8,000 Wh usable, ÷ 0.85 = 9,412 Wh of rated capacity.
- On the EcoFlow DELTA Pro Ultra X12,288 Wh × 0.85 = 10,445 Wh usable, ÷ 1,000 W = 10.4 h.
Stations that run it
Every power station in the data with this appliance alone plugged in, at 85% efficiency. Type the running watts from your own label and the table works it out again.
What moves the number
The motor starts again whenever the drum or agitator changes direction, and each start asks for about 1,200 W, up to 2,300 W on some machines. Running draw is 500 W to 1,320 W, with top and front loaders in the same range.
Questions
How many watts does a washing machine use?
Can a portable power station run a washing machine?
How long will a power station run a washing machine?
Why does a washing machine need a high surge rating?
Sources
Researched from these pages, then checked against them a second time. The check corrected at least one figure.
- GE 4.2 cu. ft. Capacity Washer with Stainless Steel Basket - GTW485ASJWS maker product page, checked
- GE ENERGY STAR 4.8 cu. ft. Smart Front Load Washer - GFW550SSNWW maker product page, checked
- Generator Wattage Chart: Common Appliances & Tools (Champion Power Equipment) generator maker guide, checked
- Choosing a Generator, Quick Reference Wattage flyer (Champion Power Equipment) generator maker guide, checked
We read published figures and do the math; we do not measure appliances. The methodology states every formula on this page. Capacities are rated watt hours: 1,000 Wh rated gives 850 Wh usable at the default.