Appliance runtimes

Will a power station run it?

Watts, start-up draw and runtime for common home appliances on a portable power station, with how many current models can run each one.

A flashlight lighting the rating label on the back of a refrigerator, where the watts, amps and volts are printed
Illustration

Quick answer

Three numbers decide it. The station's continuous AC output must cover the appliance's running watts, its surge rating must cover the start-up draw of anything with a motor or compressor, and its battery size sets how long it lasts. A fridge averaging 60 W runs about 13 to 15 hours on a 1,000 Wh station; a 1,500 W space heater runs well under an hour.

Pick an appliance

Runtimes are for one appliance on a full charge, with 80 to 90% of the battery reaching it. "Models that run it" counts the 13 current models in our database whose output and surge ratings cover it. Start-up figures are volts times starting amps (VA), as motor and compressor makers publish them; comparing them with surge watts errs on the safe side.

In this section

How to read these numbers

Every card above answers the same three questions for one appliance.

Will it start?

Motors and compressors, such as pumps, freezers and air conditioners, draw extra power for a moment when they start. A station's surge rating has to cover that moment. Where a maker publishes a start-up figure, we show it and check it against each model.

Will it run?

While running, the appliance's draw has to stay under the station's continuous AC rating. Add up everything you plan to run at the same time.

For how long?

Battery size in watt-hours divided by the appliance's average watts gives the runtime. We assume 80 to 90% of the battery reaches the appliance after inverter losses, so every runtime is a range.

Appliances that are hard for batteries

Heat-making appliances use the most energy. A 1,500 W space heater empties a 1,000 Wh station in about 30 to 40 minutes, and a coffee maker in about 50 minutes to an hour. Loads like these work better in short bursts or on a larger station.

Well pumps and central air conditioners often need 240 V. Only a few portable models in our database supply it, and their start-up draw still needs checking against the pump or air conditioner's nameplate.

Running several appliances at once

The cards show one appliance at a time. To plan for a fridge, Wi-Fi, lights and a CPAP together, use the size calculator. It adds up your list and shows which models cover it for one day or longer.

Questions readers ask

How do I find my appliance's watts?

Look for a label on the back or bottom, or in the manual. If it lists amps and volts instead, amps times volts gives a rough upper figure. A plug-in power meter gives the most accurate number for things that cycle, like a fridge.

Why does a fridge run longer than its watts suggest?

Its compressor switches on and off. We use its average draw over a day, about 60 W for a full-size ENERGY STAR model, not the higher draw while the compressor runs.

What does "start-up may exceed surge rating" mean?

Motors draw a short burst of extra power when they start. If that burst is higher than the station's surge rating, the station may shut off instead of starting the appliance.

Can a power station run 240 V appliances like a well pump?

Only models with 120/240 V output can. Most portable stations supply 120 V only.