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Old 04-06-2003, 05:32 PM   #1
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Battery Use

I have a question if someone could help me. I am new to airstream and have bought my first 1978 31' Sov. The battery seems new and I have it on charge right now. My question is what function does the battery serve to the trailer.

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Old 04-06-2003, 05:55 PM   #2
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Cool Just about everything!

The Airstream has dual electrical systems, 12 VDC and 120 VAC. On my '72 all of the lights are 12V. All of the venilation fans are 12V. The furnace blower is 12V, as well as the on board water pump. My 'fridge was replaced by previous owners, and is a 120 VAC model. You may have a propane/12 VDC /120 VAC model, or some variation. My TV and microwave oven are 120 VAC only.

The battery is used to power the 12 volt side of things when you are not connected to "shore power" as we like to call it, when you are in transit, or if you are camping at a site without 120 VAC power.
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Old 04-06-2003, 07:42 PM   #3
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The newer trailers even require battery power to operate gas appliances like the water heater and the refrigerator (control boards). I'm not sure if they reached that point in 1978 but be aware.

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Old 04-06-2003, 08:33 PM   #4
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another thing it does is to provide emergency power to your brakes, in the event your trailer were to detach from your tow vehicle via the breakaway switch.

also, it filters the output of the univolt that powers your trailer when "plugged in".

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