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Old 09-07-2018, 10:29 PM   #1
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Join Date: Sep 2018
Location: Az
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Default Coach battery charge

My LED shows full charge when engine is running but when I shut off the engine and put on battery disconnect and inverter LED says empty, what am I doing wrong.
The battery separates has stopped cycling after a two hour road trip. Are my coach batteries charged or empty??? Thx

Danny is offline   Reply With Quote
Old 09-08-2018, 08:42 PM   #2
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Join Date: May 2018
Location: California
Posts: 134

My guess is the coach battery(ies) is (are) bad. They're not holding a charge. I had the same situation before I replaced my coach battery.

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Old 09-08-2018, 10:39 PM   #3
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Join Date: Mar 2012
Location: Maryland
Posts: 1,011

Those LED light just indicate the voltage. When the engine is running they will always indicate full as alternator voltage is about 14V. If you battery voltage drops that fast to indicate "empty" when you apply a load with engine off the battery are likely bad as rvsprinterguy mentioned.
2013 Airstream Interstate Lounge EXT on 2012 Sprinter 3500 170Ext
Formerly: 1973 Dodge B300 DIY pop-top conversion
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