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Old 04-14-2016, 02:56 PM   #1
Join Date: Jul 2015
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Battery question

Just got trailer out of storage and dealer said the battery was low and would not take a full charge. I always camp where shore power is available so my question is: does 110 charge battery or is the battery only used as conduit to provide 12 volts ? or, if the battery itself is dead would it still transfer power to 12 volt systems ?

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Old 04-14-2016, 03:11 PM   #2
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If you do a search you will find several threads telling you everything you will ever want to know about 12 volt power, but to at least partially answer your question, most trailers have a converter built in that provides a multi-stage charger for the battery as well as supplying 12volt power to the 13volt systems in the trailer. The converter converts 110 vac to 12 vdc.

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Old 04-14-2016, 03:14 PM   #3
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Yes the 120 volts charges the battery.

The 12 volt systems will work with and without the battery, in most units. Just protect the positive cable if not connected to a battery.

If it will hold a little power, you will be fine plugged in and traveling.
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Old 04-14-2016, 03:16 PM   #4
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Plug in at home and see if your 12V stuff works.
You should be fine, UNLESS the battery is so bad that it prevents the converter from charging the battery...and that is what gives you your 12v source when connected to shore power.

The battery may not be able to get back to full capacity, but you can likely still operate on shore power.


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Old 04-14-2016, 10:51 PM   #5
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Remember your battery is what what's your emergency Breakaway brakes. I think for the investment a new battery should be in order. If you never Boondock maybe you could just pick up a car battery. I just saw the local Walmart here in PA had the 600 CCA battery on sale $48. Careful have a safe time camping enjoy the year... Dusty
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Old 04-15-2016, 02:39 AM   #6
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Thanks for replies,most helpful. I will get a new battery-soon.
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Old 04-15-2016, 02:52 AM   #7
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A marine type battery from Walmart may be a good way to go. A hybrid - not a true deep cycle and not a starting battery. We put a pair in my sons Motorhome as he seldom dry camps. Have provided good service for 3-4 years so far. About $100 with good warranty serviced anywhere there is Walmart.

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