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Can a power station run a window AC?
Updated
A small one, yes, for a short while. A 5,000 BTU window unit draws around 500W while its compressor runs. A 1,024Wh power station keeps that going for about 1.8 hours nonstop, or about 3.5 hours if the compressor cycles off half the time. It is a nap, not a night.
Check these two things on your AC
- Running watts. It is on the nameplate on the side of the unit. Small 5,000 to 6,000 BTU units are usually 450 to 600W. Units of 10,000 BTU and up can pass 1,000W.
- Startup surge. The compressor pulls several times its running watts for a moment. Inverter style window units start gently. Older units start hard.
All three of our 1 kWh picks list 1,500W or more of output, and the Anker and Jackery both list a 3,000W surge peak, so a small window unit should start. The 300W units cannot do this job.
Runtime for a 500W window unit
| Unit | Compressor on nonstop (500W) | Cycling half the time (250W average) |
|---|---|---|
| Anker SOLIX C1000 Gen 2, 1,024Wh | About 1.8 hours | About 3.5 hours |
| Jackery Explorer 1000 v2, 1,070Wh | About 1.9 hours | About 3.7 hours |
| BLUETTI AC180, 1,152Wh | About 2.0 hours | About 4.0 hours |
On a very hot day the compressor rarely rests, so plan on the left column.
A better plan for heat
Moving air costs far less power than cooling it. A 40W box or pedestal fan runs about 18.4 hours on the same 1,024Wh battery. A fan plus a cool, damp cloth will get most healthy adults through a hot night. Use the AC in short bursts to cool one closed room before bed, then switch to the fan.
Picks
- Anker SOLIX C1000 Gen 2: the highest output here at 2,000W, so it has the most headroom for a hard-starting compressor. Its listing also claims a 49 minute wall recharge, which helps during rolling blackouts. Caveat: about two hours of AC per charge.
- Jackery Explorer 1000 v2: its own listing names AC units among the things it can power, and it is the lightest 1 kWh pick at 23.8 lb. Caveat: 1,500W of output leaves less room for a larger window unit.
Solar can help in the daytime, since the sun is strongest when you need cooling most. See how many panels you need.
Put your own numbers into the runtime calculator, or compare all five units on the best picks page.
Health note: extreme heat is dangerous for babies, older adults and people with some health conditions. A power station is not a reliable way to keep someone safe in a heat wave. Know where your local cooling center is, and call for help if someone shows signs of heat illness.