suggest a heated mattress cover

JimK-NY wrote:
A modest 5 amp electric blanket means 50 amps at 12 volts. That would pull down an averaged sized battery to half power every hour of use.

My 120v Sunbeam mattress pad is rated 2 halves at 180w each.

That sounds scary, but there are 10 heat settings, and #1 or 2 is all I've ever needed. The heat cycles - it's not on all the time - and overnight it uses very little power.

If you turned this thing up past 3 you'd cook yourself.

We've been using Electrowarmth heated mattress pads for about 20 years and love them. The queen pad in our motorhome is about 10 years old now, and has worked flawlessly. We have a 120 volt version. Electrowarmth does make 12-volt pads, but they're better suited to the narrow bunks used in truck sleepers, etc.

Electrowarmth.com

Electrowarmth Heated Dual-control Olympic Queen-size Electric Mattress Pad

The only company I’m aware of that makes a 12v mattress pad is Electrowarmth. At one time they made twin and queen sized mattress heaters, but I think they were pushing the limits of the 12v cigarette lighter plug because they discontinued the queen size several years ago. They still make the twin size, and it’s intended to be used in the sleeper bunk of a semi.

I actually have one of their old queen mattress heaters, and it still works very well. However, I cut the plug off the cord and hardwired it to its own CB several years ago because the plug was getting too hot. When we travel in the winter time, I turn it on while we’re on the road to keep the mattress warm. Much nicer than crawling into a freezing bed at night.

If mine ever dies on me, I’ll replace it with a 120v model, and run it from my inverter. Electrowarmth makes 120v models as well, and it might be one of theirs. We have a 120v mattress heater at home, and it works well too. I like them much better than electric blankets. The heat is where I need it at night. Under me, rather than on top.

Mattress heaters and electric blankets are like microwaves now, most all of them have digital controls, and they don’t tend to like cheap, MSW inverters.

:):)

Not a mattress cover but there are 12V blankets & throws available and they're pretty reasonable. Lay over the top sheet under the blanket/quilt/whatever, turn it on a half hour before going to bed.

A modest 5 amp electric blanket means 50 amps at 12 volts. That would pull down an averaged sized battery to half power every hour of use.

Another option is hot water bottle(s). There are some really reliable heavy duty models available through Amazon. They will put out heat most of the night.

rvshrinker wrote:
or do i need to get an inverter to power it off grid?

I've not seen a 12v one nor would I want one, as you should have a 120v outlet near the bed. Make sure it's a pure sine inverter. The controls don't like cheap inverters.