A 1,000 Wh power station runs a typical queen electric blanket for about 12 hours, which covers a cold night; a 300 Wh unit gives you about 3 to 4 hours. Blankets draw around 100 W while heating and their thermostats cycle them on and off, so they're the most battery-friendly way to stay warm when the power is out.
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Runtime by blanket setting and power station size
Assumes the blanket heats about half the time, plus the battery reserve, inverter loss and standby draw.
| Blanket | 288 Wh | 1,024 Wh | 2,048 Wh |
|---|---|---|---|
| Queen blanket, typical setting (about 110 W) | 3.5 h | 12 h | 22 h |
| Dual-control queen, both sides on high (about 240 W) | 1.7 h | 6 h | 12 h |
Why a blanket goes so much further than a heater
A space heater warms the air in a room and draws about 1,500 W to do it. A blanket warms you, under insulation you're already lying in, at around a tenth of the power. Its thermostat also switches the heating element off once it's warm, so average draw over a night is lower still. That's why a battery that lasts half an hour with a heater lasts a whole night with a blanket.
How to stretch a night of warmth
- Pre-heat, then turn it down. Run it on high for 20 to 30 minutes before bed, then drop to the lowest setting.
- Use a mattress pad and a blanket on top. Heat from below, trapped by an unheated comforter, holds longer.
- Turn off ECO mode. Low, cycling loads can trigger the station's auto-off.
- Share it. One dual-control blanket on two moderate settings uses far less than two separate heaters.
Follow the blanket maker's safety instructions, and don't use one on an infant or anyone who can't switch it off themselves.
Anker SOLIX C300
288 Wh at 9 lb: a few hours of blanket warmth plus phones, easy to carry to the bedroom.
- Capacity
- 288 Wh
- Output
- 300 W
- Weight
- 9.1 lb
- UPS
- 10 ms
Paid link
Check price on Amazon
Anker SOLIX C1000 Gen 2
1,024 Wh: a blanket through the night, or a blanket and phones with room left for the morning.
- Capacity
- 1,024 Wh
- Output
- 2,000 W
- Weight
- 24.9 lb
- UPS
- 10 ms
Paid link
Check price on AmazonCheck your own blanket
Set the watts from your blanket's label and the hours you'll use it, then add anything else that will share the battery.
1. What you want to run
Electric blanket or heated mattress pad (queen)
Cycles on about 50% of the time.
Far more efficient than a space heater. Dual-control queens can reach 240 W with both sides on high.
Phone or tablet chargingestimate
Tiny load. Use the USB ports, not the AC outlet.
2. The power station
What people actually ask
How long will a 1000 Wh power station run an electric blanket?
About 12 hours for a typical queen blanket drawing around 110 W while it heats and cycling on about half the time. That's a full night. With both sides of a dual-control blanket on high, expect about 6 hours.
Can a small 300 Wh power station run an electric blanket?
Yes, for a few hours: about 3 to 4 hours for a typical queen. Pre-warm the bed, then switch the blanket off or to its lowest setting to stretch it further.
Is an electric blanket better than a space heater on battery power?
By a wide margin. A space heater on high draws about 1,500 W and empties a 1,000 Wh station in about 30 minutes; a blanket draws a small fraction of that and warms you directly instead of the room.
Should I turn off the power station's ECO mode for a blanket?
Usually yes. When the blanket's thermostat cycles off, the AC load drops near zero, and some stations switch their outlets off after a while at low load. Turn that mode off before you sleep.
Are 12 V heated blankets more efficient?
They skip the inverter, so none of the roughly 15% AC conversion loss or the inverter's standby draw applies, and they're designed for low wattage. They also put out less heat than a household queen blanket; check the wattage on the label.
The bottom line
An electric blanket is the right way to stay warm on battery power: about 12 hours from a 1,000 Wh station, a few hours from a 300 Wh one. If you're also keeping a fridge or a furnace blower going, see the winter storm plan or let the sizing quiz size the whole list.