Electric Blanket - Page 3 - Fiberglass RV


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Old 10-13-2011, 01:09 PM   #29
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Excess Charging Capacity?

Jim,

Excess charging capacity is for days like today where the sun is stuck behind big, thick clouds. I suspect that 80 watts are more than we truly need the way we are setup witht the LEDs.

I still have one Incandescent, the eyeball light. When that bulb dies I'll replace it with an LED. The Eyeball fixture draws more power than the 7 LEDs.
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Old 01-04-2014, 10:10 PM   #30
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Jim,
When my watt meter comes I'll measure the current draw for the electric blanket and report in. I really think it's relatively insignificant over a night.


I must admit I am anxious to get the watt meter and understand in more detail the true current draw of things and the ability of the panels to keep the battery charged.
Did you ever do this?

Curious to estimate what it would use battery AH wise to run an electric blanket for a night. No idea if the duty cycle is 60% or more like 10%.
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Old 01-08-2014, 06:40 PM   #31
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I never did it but will try tomorrow night.

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Old 01-08-2014, 07:48 PM   #32
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We have a 12 volt electric blanket. It's small but will warm up the bed nice, then switch it off. Actually it has a timer, but that broke early on. We also have a 110 electric blanket that we have been wishing we had brought since this cold weather hit here in the south. Never expected it!!
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Old 01-08-2014, 07:50 PM   #33
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I wonder which is more efficient, the 12v model or the 120v thru an inverter model?
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Old 01-08-2014, 09:15 PM   #34
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I'm guessing the 12 volt may be more efficient, unless of course you are hooked to shore power. The 12 volt blanket is more intended as a lap blanket for the vehicle passenger. It worked great in our 4' wide teardrop, I don't think we have used it in the Uhaul, maybe once.
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Old 01-09-2014, 05:37 AM   #35
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Our electric blanket is a twin size. It seems perfect for the Scamp. Maximum wattage is 160 watts, suggesting about 15 amps an hour from the battery at 100% duty cycle, a rather significant drain.

Fortunately the duty cycle us less and though I don't have our proper electrical equipment should be ready to estimate by watching battery voltage, probably visible in the lights, like when the water pump turns on.

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Old 01-09-2014, 08:24 AM   #36
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If you are looking for cozy, you might consider flannel sheets. They cost more than an electric blanket but use far less electricity . Now is a good time to buy them. Raz
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Old 01-09-2014, 09:56 AM   #37
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We have a full size 120V electric blanket w/ heat settings. Pulls about 160W peak as well. Ran it for an hour last night on setting 3, and it used 94 watts/hr, or close to 60% duty cycle....Wondering if setting 1 is 20%, and 5 is 100%? Not sure if mine is temperature compensated at all.

I'll do some further research and find out eventually. Hoping to not need a furnace in a future camper, so wondering if we can get away with the electric blanket for a night or 2 on the battery.
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Old 01-09-2014, 09:59 AM   #38
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That is about 60 a/h using 8 hours @ 15 a/h draw @ 50% use, seems high.
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Old 01-09-2014, 10:05 AM   #39
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That is about 60 a/h using 8 hours @ 15 a/h draw @ 50% use, seems high.
It does seem high at that setting. I need to find out if the blanket temperature compensates or not. Also, I know that setting 3 keeps me warm under a sleeping bag in a 45 degree room, so thinking we can use setting one or 2 for most of our camping where heat needed while NOT on shore power, and hoping that setting one is 20% duty cycle, 2 is 40%, etc. If we can use setting 1 for 8 hours a night and it IS 20% duty cycle:

32 watts/hr @ 120V.
Add in an extra 12% for inverter efficiency losses = 36 watts/hr
Divide by 12V = 3ah/h, so 24 AH/Night in 8 Hours. THAT seems doable to me for 2 nights if I get a big battery or 2.
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Old 01-09-2014, 10:08 AM   #40
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agreed, add solar and you may only need one battery…...
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Old 01-09-2014, 11:41 AM   #41
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I definitely think one can do it.
I tried running game Mine off our cigarette lighter 150 watt inverter.

The electric blanket's screen controller did not like the no - sine wave output of the inverter. This is the first electronic device I've found that didn't like these inverters.

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Old 01-09-2014, 11:48 AM   #42
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It seems kinda ironic that a restive heating appliance is the first thing you found that objects to a modified sine wave inverter. The simplest possible application. I realize it is the controls, but still.
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