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Old 08-21-2018, 05:37 PM   #1
Join Date: May 2018
Location: Virginia
Posts: 38
SUN #10562
Vacallum85 is an unknown quantity at this point
12v charger

Anyone know how to check if my inverter charges my 12v battery? Its hooked up to mains power but when running on my 12v battery its weak as anything? Anyone know how to check everythings ok?

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Old 08-21-2018, 07:49 PM   #2
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Join Date: Jun 2011
Location: New Jersey
Posts: 499
SUN #2366
j52wf is an unknown quantity at this point
With the camper plugged into shore power and converter charging the battery, put a tester across the battery terminals. Should read between 13-14 volts to charge battery. You may also have a bad battery if it doesn't hold a charge. I bought a brand new Exide from BJs that I had to return because it would discharge overnight.

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Old 08-21-2018, 07:52 PM   #3
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Join Date: Sep 2016
Location: Virginia
Posts: 784
SUN #8893
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I have one of these installed.

It includes a voltmeter. When the converter is charging the battery, the voltmeter reads 13.#. This is how I know when the converter is charging the battery. When the converter is not on and I am running on battery only, the voltmeter reads 12.#. I am not sure how accurate it is but it does help. For me, that is the only way I know. I am sure the more experienced members will have more.
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Old 08-30-2018, 10:30 AM   #4
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Join Date: Nov 2012
Location: Tennessee
Posts: 146
SUN #4578
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Exclamation . Old Converter , less than 13 volts.

I would also comment a bad reading I got from a Sunline resale.. Over time the original converters stat to make loud noise. I thought the lady seller gave me a very old Battery, but it turned out to be only one year old..... Voltmeter on the charger terminals showed only NINE Volts, as a circuit board in the unit was partially bad.... New convertors can be bought , Camping world , Amazon etc....
My quick fix was to unhook the wire & charge with my typical Sears garage charger & squeeze clamps. . Needle meter on the front garage charger..
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