The Onan doesn't charge the house batteries, the Xantrex or which ever charger/inverter you have does. You need to check the Xantrez to see if the indicator light is solid green or red or flashing. If it is not solid green then the problem may be more complex.
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J.J. Hayden (KN4SH)
Covington, GA
2005 National Dolphin 5342
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