Low-power heat

Best 12V Electric Blankets for Van, Tent and Cabin

Updated October 14, 2026 · Product availability last verified October 14, 2026

The short answer

For a car or van socket, the Car Cozy 2 is the pick: 48 watts and 4 amps per its listing, with a safety timer that protects the starting battery. For a tent on a power station, the Ignik Flipside heats from under you at 48 watts max. For a cabin or van bed on a battery bank, the Electrowarmth T36 pad runs on a thermostat at about half its 6.2 amp maximum.

• Plan on: 4 to 6 amps, so a 12V 100Ah lithium battery runs a 45 to 60 watt blanket for about 17 to 23 hours at full heat.
• Use the 12V port: a 100 watt household throw through an inverter uses about twice the battery per night.
• Never: fold, tuck or cover a blanket in use, or run one on a car's starting battery with the engine off.

A 12V electric blanket heats you, not the space, for about 4 to 6 amps. That is why it can run all night from a power station or a small battery when a plug-in space heater would drain it in under an hour. Below are the picks for a car socket, a tent and a cabin bed, the runtime math for batteries and power stations, and the safety rules that matter more with blankets than with most gear.

Which blanket for which situation

• A car or van, plugged into the dash socket: the Car Cozy 2. Published 4 amp draw and a timer, so it cannot flatten the starting battery.
• A tent, run from a power station: the Ignik Flipside. It heats the sleeping pad from below and plugs into the station's 12V car port.
• A cabin bunk or van bed on a battery bank: the Electrowarmth T36. A thermostat pad that averages about half its maximum draw.
• Long drives and easy washing: the Westinghouse 12V car blanket. A 4 hour shut-off and a machine washable version.
• A normal 120V throw from a power station's AC outlet: the Beurer HD71. Published 100 watt draw and a 2 hour shut-off.

From the makers' pages and manuals where published: Ignik Flipside · Electrowarmth 12V bunk warmers · Beurer HD71 manual · CPSC electric blanket checklist. "Per listing" means only the Amazon listing gives the number. Amazon availability checked October 14, 2026.

How long will a battery or power station run an electric blanket?

Divide the usable watt-hours by the blanket's watts. A 12V 100Ah lithium battery holds about 1,280 watt-hours, and using 80 percent of it gives about 1,020. A power station's 12V car port skips the inverter, so we count 90 percent of its capacity; through the AC outlet we count 85 percent. "Half heat" assumes the blanket or its thermostat is on about half the time, which is what Electrowarmth estimates for its pads.

A night is 8 hours. Math on rated figures, not measurements; the 90 percent 12V-port figure is our assumption, since makers do not publish it.

• Ignik Flipside on a Jackery Explorer 1000 v2: 1,070 watt-hours divided by 48 watts is about 22 hours at full heat. At Ignik's listing figure of 250 to 300 Wh a night, about three and a half to four nights.
• Electrowarmth T36 on a 12V 100Ah lithium battery: 6.2 amps at 12 volts is about 74 watts. At the maker's half-draw estimate, an 8 hour night uses about 300 watt-hours, so about three and a half nights; flat out all night, under two.
• Beurer HD71 on a 1,000Wh station's AC outlet: 100 watts becomes about 118 from the battery, so about 8.5 hours in total. One full night would use almost all of it.

Why a blanket can draw more than its label: a heating wire's power rises with the square of the voltage. A blanket rated 48 watts at 12.0 volts draws about 53 watts on a power station's 12.6 volt car port, and a charging vehicle runs higher still. Leave some headroom, and read the watts on the power station's display the first night. Size the rest of your system with the runtime calculator.

How to choose a 12V electric blanket

Start by deciding what you are heating. A blanket or pad warms the person, not the air, which is why it runs on 4 to 6 amps while a plug-in space heater draws far more than a small battery can supply for long. If you need the van or cabin itself warm, look at a diesel heater or a propane heater, and use a blanket for the hours you are in bed, when combustion heaters should be off.

Then match the blanket to the power you have. On a vehicle's dash socket, pick a blanket with a published amp rating under the socket's fuse and a timer, and only run it with the engine on. On a power station, use the 12V car port rather than the AC outlet whenever the blanket allows, because the inverter loses about 15 percent and household throws draw roughly twice as much. On a battery bank, a thermostat pad like the Electrowarmth averages far less than its maximum.

Think about where the heat goes. A pad under you, like the Ignik on a sleeping pad or the Electrowarmth under a sheet, puts heat into the layer that otherwise steals it, so it feels warmer at the same draw. A blanket on top works best under a quilt or sleeping bag that holds the heat in, never folded or bunched up.

Finally, check the timer and the washing. Short timers protect starting batteries but stop in the night; long or no timers suit a bed on a house battery. Machine washable blankets save a lot of hassle in a van, and a published draw is worth more than a feature list, because it is the number you need to plan your battery.

Frequently Asked Questions

Do 12V heated blankets work?

Yes, as long as you expect them to warm you rather than the space. A 12V blanket puts about 48 to 75 watts into the layer against your body, which is why it keeps you comfortable in a cold van or tent on a fraction of the power a space heater needs. It will not raise the air temperature of a room, so pair it with a good sleeping bag or quilt on top. Pads that go under you, like the Ignik Flipside or Electrowarmth T36, lose less heat to the cold ground or mattress than a blanket on top.

How much power does a 12V electric blanket use?

The ones that publish a figure use about 48 to 75 watts, or 4 to 6 amps at 12 volts. The Car Cozy 2 is 48 watts and 4 amps per its listing, Ignik rates the Flipside at 48 watts max, and Electrowarmth rates the T36 bunk pad at 6.2 amps max with an estimated average of about half that. Over an 8 hour night at full heat that is roughly 380 to 600 watt-hours, and about half on a low setting or with a thermostat. Real draw also rises a little with voltage, so a power station's 12.6 volt port can push a blanket slightly above its label.

How long will a Jackery 1000 run an electric blanket?

About 22 hours at full heat for a 48 watt blanket like the Ignik Flipside. The Jackery Explorer 1000 v2 holds 1,070 watt-hours and has a 12 volt, 10 amp car port, and 1,070 divided by 48 is about 22 hours before any conversion loss. At Ignik's listing figure of 250 to 300 watt-hours a night, that is about three and a half to four nights. Running a 120V blanket through the AC outlet instead costs about 15 percent more energy to the inverter.

Can I leave a 12V blanket on all night in my car?

Not on the car's own battery with the engine off. Vehicle manuals, including Kia's, say to use the power outlet only with the engine running because long use with the engine off can drain the battery, and a drained starting battery is a real problem on a cold morning. For overnight heat, plug the blanket into a power station or a separate house battery instead. Blankets with short timers, like the Car Cozy 2, are designed for naps and drives, not all-night use.

Is a 12V blanket or a 120V blanket better on a power station?

A 12V blanket on the car port is usually better. It skips the inverter, which loses about 15 percent, and 12V blankets draw about half of a typical 100 watt household throw, so one 8 hour night uses roughly a third to a half of a 1,000Wh station instead of nearly all of it. A 120V throw like the Beurer HD71 is softer and bigger, and works well for warming a bed or couch for an hour or two. Check that your station's car port is rated for at least the blanket's amps; the Jackery 1000 v2 and EcoFlow DELTA 3 ports are rated 10 amps.