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Old 04-11-2014, 12:15 PM   #21
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A 1500 watt hair dryer (some are as much as 1700 watts) will use 1500/120 or 12.5 amps at 120 volts. At 12V you need to multiply the amperage by at least 10 (with no inverter loss) so it will draw a minimum of 125 amps. Amp hour wise, 15 minutes would be 1/4 hour X 125 or 31.25 amp hours. Depending on your battery type, that could be as much as 1/2 the total usable capacity.

Even with a pair of 6 volt batteries, which can hold 232 amp hours, since you should only use about 1/2 the capacity, you could only get 3 days before needing to recharge. And, of course, that does not include any other loads...
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Old 04-11-2014, 12:19 PM   #22
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Originally Posted by Vermilye View Post
A 1500 watt hair dryer (some are as much as 1700 watts) will use 1500/120 or 12.5 amps at 120 volts. At 12V you need to multiply the amperage by at least 10 (with no inverter loss) so it will draw a minimum of 125 amps. Amp hour wise, 15 minutes would be 1/4 hour X 125 or 31.25 amp hours. Depending on your battery type, that could be as much as 1/2 the total usable capacity.

Even with a pair of 6 volt batteries, which can hold 232 amp hours, since you should only use about 1/2 the capacity, you could only get 3 days before needing to recharge. And, of course, that does not include any other loads...
Sunshine and a good fluffy towel is the other option.
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Old 04-11-2014, 03:28 PM   #23
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Quote:
Originally Posted by Vermilye View Post
A 1500 watt hair dryer (some are as much as 1700 watts) will use 1500/120 or 12.5 amps at 120 volts. At 12V you need to multiply the amperage by at least 10 (with no inverter loss) so it will draw a minimum of 125 amps. Amp hour wise, 15 minutes would be 1/4 hour X 125 or 31.25 amp hours. Depending on your battery type, that could be as much as 1/2 the total usable capacity.

Even with a pair of 6 volt batteries, which can hold 232 amp hours, since you should only use about 1/2 the capacity, you could only get 3 days before needing to recharge. And, of course, that does not include any other loads...
Isn't that figuring that they are using high temperature setting? My wife normally uses low heat setting and a short amount of time, so I'm expecting this to work.
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Old 04-11-2014, 03:41 PM   #24
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My wife tells me it takes her 8 minutes to dry her long hair with her 1500w drier on high, she washes it every 2-3 days. Using Jons numbers that's 16.7A every 2-3 days. With the surge involved you'd probably need a 2000w inverter, but that's just a guess. Don't know what the low setting uses. The hair dryer makes our 2000w generator kick into high gear.
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Old 04-11-2014, 03:54 PM   #25
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Originally Posted by cpaharley2008 View Post
1800 watts/12v= 150 amps pulled from your batteries.

If you run it for an hour.
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Old 04-11-2014, 04:32 PM   #26
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Quote:
Originally Posted by cpaharley2008
1800 watts/12v= 150 amps pulled from your batteries.
Yes, 1800 watts divided by 12 volts is a current of 150 amps pulled from the battery, for as long as you run the appliance. Of course, few hair dryers use 1800 watts.

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If you run it for an hour.
Jim is correct, so if you use 150 amps for an hour, that's 150 amp-hours; if you only use it for 1/4 hour, that's 37.5 amp-hours (for instance).
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Old 04-11-2014, 04:43 PM   #27
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We use 12V chargers, or you can get a 12V plug that has one or two USB charging outlets on it, and just use the USB cable from your AC charger.
I agree that this is the way to for for stuff that charges from USB. Cheap, efficient, convenient, effective. But get a high-current USB charger, at least 1.5 amps and preferably more, to handle devices which demand more than the traditional 0.5 amps. Some phones, and just about any tablet, needs the higher current.
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Old 04-11-2014, 05:12 PM   #28
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I'm also going over the build sheet for my 5er reserved for December. I've decided to include the 1500W inverter to power the microwave when we dry camp. We will mount the single outlet for this power in the cabinet behind the microwave. My wife says the microwave is a must.
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Old 04-11-2014, 06:25 PM   #29
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My. Inverting, outverting, converting, diverting, all kinds of verting going on. I'm getting all amped up about it.

I'm trying to use as much DC power as I can. Looking at the inverter options, 800W and 1500W that Escape offers, I'm going to get an after market inverter.

Looking at the offerings online at such places as Amazon, Walmart, Harbor Freight and more, there's ones up to 10,000W peak. Wonder how long your 126ah battery lasts with a 1500W inverter using it for 10 minutes or so with a 1100 watt microwave, or hair dryer a few times a day.

Does anyone know if when you have an inerter hardwired to your battery, is there any draw on the battery when A/C is not being used and it's idle?
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Old 04-11-2014, 07:11 PM   #30
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We cook inside a lot and wouldn't want to be without the hood. The fan has a marginal effectiveness-to-noise ratio, though. It only has enough power to push the outside flap about halfway open, so we often turn our ceiling fan on, drawing air into the Escape which helps push the cooking steam and smells out the vent (same way we vent the bathroom). At some point, I'd like to install a better fan in the existing hood. Oh, and the bulb burned out before we got home from Chilliwack, which I replaced with a 30 LED panel from Super Bright LEDs held in with double backed foam tape. It provides great light right over the stove.
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