suggest a heated mattress cover

Thanks everyone. Again only she needs something, not me, and only until she gets in bed, not all night. She just doesn't want to get into a Cold bed. So the question is if this will work off grid for an hour in the evening for several nights in a row without draining much of our battery.

If you want to stick with a 12v mattress heater, I see no reason why you couldn’t use one or two of the Electrowarmth twin sized bunk warmers. They aren’t fitted like a typical bottom sheet, they just cover the top of the mattress. One could be layed down the middle, and that might provide enough of a warm spot for two. Or, lay it across the mattress, either in the foot area or the chest area. The bunk warmer is 60” long, and a standard queen mattress is 60” wide.

Another thing I’ve considered doing is buying two of the bunk warmers, and sewing them together to make a dual zone queen mattress heater. It would be wider than a queen mattress, so you’d have 5-6 inches hanging down each side, but as long as you don’t overlap them I don’t see that as a problem. I’d probably start with one and see if that would work. They’ll work best if you still use a heavy blanket or comforter on the bed, otherwise the heat just rises off the pad and the mattress never gets really warm.

They claim a 6.2 amp current draw on the 12v bunk warmers, which is probably accurate since my queen size warmer draws about 7 amps. They cycle off/on even on the highest setting though, so the actual current draw is more like 50% of that. You probably won’t want it on the highest setting while sleeping.

:):)

My twelve volt electric blanket draws 5 amps. No problem running it all night on a battery--but one needs a way to recharge the next day.

Non-powered solution. Get a memory foam topper (you could get twin for her side only) and it holds body heat. Keeps me toasty on the coldest of nights. Flannel sheets are a plus too.

I think she’d be happy with something that warms up the bed before she gets in. Doesn’t need something all night.

Have you tried non-electric solutions? Self heating options like sherpa, plush, microfiber, etc.

I have an electric mattress pad at home. In the campers, I have good quality microfiber sheets (Cosy House 1500 or 1800 series), plush blankets, and faux fur/sherpa comforters. They provide a self heating bed - holding my body heat in. And the microfiber sheets don't get as cold as cotton, so you don't have a major shock if you move your feet around during the night. You can also try a sherpa mattress pad (unheated).

If you are going right from driving to bed, a 12v electric throw blanket would work to heat the bed. But it won't keep the bed warm all night. And if you don't go right to bed, you'll have to go back to the vehicle at bedtime, start it up, warm the blanket and rush it to the bed. Not really practical long term.

rvshrinker wrote:
the shore cord is outside, wouldn't the inverter be inside? How do you connect them?

Ok, I guess you must have a socket on the outside of your coach with a removable cable. Is there a hole somewhere you can use? My inverter is wired directly to the 120v panel.

Realize the inverter conversation is its own topic, but the shore cord is outside, wouldn't the inverter be inside? How do you connect them?

rvshrinker wrote:
the inverter looks like more trouble than I’m willing to go to right now .

It's very little trouble if you plug your shore cord into it. Turn off the converter, bingo, everything works.

rvshrinker wrote:
ow about a heated blanket that charges on USB? I could charge it in the tow vehicle during the day (while driving), then she could put it in the bed in the evening.

USB is what, 5 volts? I wouldn't count on that working too well.

the inverter looks like more trouble than I’m willing to go to right now (we don’t have a generator, when we boondock we just don’t use the microwave but can use everything else - lights, USB plugs, etc).

How about a heated blanket that charges on USB? I could charge it in the tow vehicle during the day (while driving), then she could put it in the bed in the evening. Though some days we don’t drive far enough to charge one.