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Old 03-04-2010, 09:07 AM   #29
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1957 26' Overlander
1956 22' Flying Cloud
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Originally Posted by Jammer View Post
Let's take the fridge as an example. 1.5 amps at 120 volts.

If you run it on an inverter, it will use approximately 10 times as many amps, so that's 15 amps.

Fridges typically run about half the time, because the thermostat turns them on and off. So, in one day (24 hours), the fridge will run about 12 hours. 15 amps * 12 hours = 180 amp-hours. That makes for a big battery bank, which is why I'm suggesting that you do something different.

If we looked at the air conditioning, it draws 8 amps at 120 volts. If you ran it through an inverter, it would draw around 80 amps and 12 volts. If you decided to run it for six hours on a hot afternoon, you'd need 80 * 6 = 480 amp-hours of battery capacity just for that, which would completely discharge four brand new deep cycle batteries of the sizes typically used in Airstreams.
ok, that math makes sense!!! thank you.

we'd essentially need 2 batts for just the fridge for 1 day.

Instead of purchasing an expensive LP or 12v fridge, right now i think ill stick with my cheapo compact 115v fridge, and instead of running the fridge on dry camping days, We'll get ice for the cooler. SOLVED.

I'm not sure that kind of purchase (12v or LP fridge) would pay for itself anytime soon. perhaps if we find ourselves boondocking more often in the coming years we will upgrade.

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Old 03-04-2010, 09:52 AM   #30
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Whew, LOTS of solid info here. Dont understand it, but I like it.
Im in awe of all you that do Thanks for the lessons.

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Old 03-04-2010, 12:12 PM   #31
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"Instead of purchasing an expensive LP or 12v fridge, right now i think ill stick with my cheapo compact 115v fridge, and instead of running the fridge on dry camping days, We'll get ice for the cooler. SOLVED. "

NOW you're thinking like a 'streamer! and less is usually more... but as one who really LOVES his propane fridge (like all the duck hunters out in the marsh with camps that have them..) keep it in mind maybe for a long-term purchase, especially if you already have the venting....
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Old 03-04-2010, 12:17 PM   #32
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True enough, you could get buy for awhile by just sticking a bag of ice in the old fridge. A decent LP fridge will last you twenty years, so they are an investment.

I bought a new Dometic fridge through Palomino Parts last year, and it's a dandy. Way better than my old one...but the old one lasted 22 years before she gave up the ghost. So, you could get by with whatever you must for awhile, but I think you'd really like a good LP fridge.

It sure sounds like you found a really superb trailer. What a cool project!

see ya on the road,
- Jim
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Old 03-04-2010, 12:23 PM   #33
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re: propane fridges believe it or not, there's this incredibly nice guy in Alabama who repairs RV propane refers:

Rv Refrigeration Repair

..and I think he'll overhaul just the cooling unit (if you can remove and ship it to him) and make your old dometic good as new!

...I just get such a kick out of seeing that tiny blue flame making ice cubes...I dunno..I can't explain into ice...ain't science wonderful?

...and when traveling, we use those blue jelly freeze fake-ice things to keep the fridge cold, no melted ice water to deal with..... we now return you to our regularly scheduled thread...
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Old 10-16-2010, 05:42 PM   #34
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30 amp to house plug

I'm going back to school on a shoe string and living full time in my 25 ft. Excella-2001. I plugged my 30 amp (with an adapter) to a heavy dury extention cord to the interior house outlet. I use very little electric. A light, lap top computer, fridge, sometimes a fan. I tried using my hair dryer once. The extention cord has some kind of fuse on it and it would not tolerate the hair dryer.So, I don't use it. Today ,while using minimal power, the cord turned itself off. I checked the AS 30 amp cord and adapter- it was hot and damaged. Checked the house socket and the brain surgeon that is doing repairs in the house had a barn buster heater plugged into the same socket.
I know I need to replace my damaged AS 30 amp cord-- if nothing else was plugged into a house outlet--can I safely use this power source to run the fridge, a light, and computer? thanks for any help
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Old 10-16-2010, 10:21 PM   #35
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a few facts are needed.
breaker rating on the house outlet (and gauge of wire if known)
gauge of extension cord and length
any power draw info on the items you are using. btw, the converter uses power too.

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