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Old 05-26-2013, 08:16 PM   #1
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Heated mattresses on power inverter?

I'm sure that someone has asked this but haven't found it when searching.

DW and I just saw the new Roo 23ikss on FR and love it! Thinking about making the trade from our 2012 HW277. Have read that many of you install an inverter to power tv's and such when dry camping. Is anyone running their heated mattresses or blankets off an inverter? You know- for roughing it? Was thinking of maybe a 1500 or 2k powered by 2 group 24's. maybe an occasional movie.

Just was thinking ahead so I'm ready if the Roo shows up in front of the house one day 😜
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Old 05-26-2013, 08:54 PM   #2
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what's the power usage off the tag of your electric blanket or heated mattress say? that will give you the power it needs. generally heated blankets are low amp draw and very efficient appliances...

also be aware, some appliances require pure sine wave inverters and may get damage or will not work with modified sine wave inverters.
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Old 05-27-2013, 09:57 AM   #3
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If you have a pure sine wave inverter, there will be no problem with a blanket or mattress pad. With one exception, modern blankets with digital controls will not work with modified sine wave inverters. Old blankets with analog controls will work with MSW inverters, but they are hard to find.

The Soft Heat blanket has its own (ac to dc) power supply and actually runs on 18 vdc. It is a little more expensive than other blankets, but is so nice that I got a second one to use at home. See Best Electric Blankets Reviews | Review Soft Heat Low Voltage

Joel
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Old 05-27-2013, 12:43 PM   #4
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The heated mattresses draw about 150 watts I believe? And your unit has 2 so that is 300 watts. 2400 watts total for an 8 hour night. So, without running anything else, P=I x E, it would take 200amp/hrs of battery to run your mattresses.
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Old 05-27-2013, 12:55 PM   #5
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Quote:
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The heated mattresses draw about 150 watts I believe? And your unit has 2 so that is 300 watts. 2400 watts total for an 8 hour night. So, without running anything else, P=I x E, it would take 200amp/hrs of battery to run your mattresses.
think you got a typo...

watts = amps * volts.

so 2400 watts = amps * 120 volts

so amps is 20Ah needed...
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Old 05-27-2013, 01:04 PM   #6
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Quote:
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think you got a typo...

watts = amps * volts.

so 2400 watts = amps * 120 volts

so amps is 20Ah needed...
So...if your calculations are correct, then 2 70ah batteries will keep me above the 50% threshold on the batteries. But that also doesn't include the power hungry furnace. Hmmm...
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Old 05-27-2013, 01:26 PM   #7
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So...if your calculations are correct, then 2 70ah batteries will keep me above the 50% threshold on the batteries. But that also doesn't include the power hungry furnace. Hmmm...

2 12volt 70ah batteries? wired in parallel, that gives you 140ah of total capacity, 50% depth of discharge usage at 70ah before serious recharging required.

yes, other appliances and devices will play into your daily/nightly drain as well (lights, co2 monitor, propane monitor, lots of little things sipping on the juice that you aren't aware of...)
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Old 05-27-2013, 01:35 PM   #8
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Well, at least it's possible. Just will have run the genny for most the next day. Got a Honda 2000 so at least it's quiet. But guess I should by the trailer first!
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Old 05-27-2013, 01:37 PM   #9
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Well, at least it's possible. Just will have run the genny for most the next day. Got a Honda 2000 so at least it's quiet. But guess I should by the trailer first!

LOL, that would help!
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Old 05-27-2013, 02:02 PM   #10
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Thanks everyone for your answers.
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