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Old 07-29-2016, 11:35 AM   #1
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Complete and utter newbie question

Not just a newbie, but a rather ignorant one too....

I've been looking a trailer that someone has completely made into a 110volt system. has no batteries.

What would I have to do, and about how much would it cost, to reinstitute a dual system? I wouldn't want to limit myself to only hookups with power.

Thanks for any insight.
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Old 07-29-2016, 11:53 AM   #2
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It is hard to say without knowing how much he may have removed. The convertor, the batteries will cost $400.00 or more. Fixture replacement you can get prices from a trailer company web site. Did he remove the 12 volt wiring if so it will be real time to replace it. How is the frig controlled and is the hot water heater pilot light only

There are lots of trailer for sale out there and unless you have a death wish look elsewhere. But if the price reflects his stupidity, at least 1/2 the competition, you will be taking a salvage project on.
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Old 07-29-2016, 12:51 PM   #3
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What year and model is the trailer? There were some trailers that were bult as "park models" that never had 12V wiring in the first place.
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Old 07-29-2016, 01:03 PM   #4
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Old 07-29-2016, 01:05 PM   #5
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Quote:
Originally Posted by Getaways View Post
Not just a newbie, but a rather ignorant one too....

I've been looking a trailer that someone has completely made into a 110volt system. has no batteries.

What would I have to do, and about how much would it cost, to reinstitute a dual system? I wouldn't want to limit myself to only hookups with power.

Thanks for any insight.
Your question is wise. The foolish question that we get all too often on this forum is about how to make a trailer 110 volt only.

Usually in 110v conversions someone replaces the fridge with a 110 volt fridge that won't run on propane. This is the most difficult and expensive change to reverse. Prices on fridges vary widely depending on size. You can check prices yourself. Depending on the history of the trailer you may also have to replace the water heater, stove, furnace, propane bottles, and regulator, if these components were discarded as they all too often are. Building up a whole propane system from scratch will cost at least $2,000 and is a prerequisite for running a trailer without 110 volt.

As far as the 12v system itself, here's materials cost. You'll find that the converter, battery box, batteries, breaker panel, wire, terminals, and ancillary components will run abour $400-$500 or so for a basic system with a 55 amp converter and a single group 27 battery. Lighting and switches don't have to be expensive, but can be if you have taste and get yacht-quality LED lights. Under $100 is possible as is over $500. The remaining components are typically three fans (range hood, bathroom, living room) and a water pump.

The labor to put this all in is considerable. It usually isn't possible to fish wires through the walls, so if the existing wiring is gone, you'll either have to remove panels or run wiring on the surface.
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Old 07-29-2016, 02:08 PM   #6
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You need a battery to activate your legal breakaway switch. It's the law.
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Old 07-31-2016, 02:44 PM   #7
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breakaway switch

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You need a battery to activate your legal breakaway switch. It's the law.
There are breakaway switches which have their own built-in battery. They don't require an external 12V battery.
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Old 07-31-2016, 07:48 PM   #8
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A breakaway switch with a battery that will supply enough current to lock up all four electric brakes?
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Old 07-31-2016, 08:13 PM   #9
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One other area of consideration you may want to double check on regarding this particular trailer is what else has been modified from factory design?

I mention this because the factory engineers designed the location, physical size, and weights of everything to make the trailer safe and stable when being towed. If this has been altered then the trailer may no longer be safe and stable when being towed.

People who are good at restorations will actually weigh the items removed during tear-out to make sure they do not replace with new items that are too heavy. Doing so could change the weight on the frame, tongue, etc.

Original documents can be downloaded on the airstream website.
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