Old-Biscuit wrote:
Disconnect battery POS cable
Plug rig into shore power
Verify converter has 120V AC Input
Measure Converter DC output
S/B 13.2V DC MINIMUM
If lower converter is bad/failing
Measure battery Voltage
Then check each cell specific gravity with hydrometer
OR just remove battery-take to auto parts store and have it Load Testes
Buy new battery
NOTE: MARK/ID Battery POS & NEG cables PRIOR to disconnecting so that you do NOT hookup backwards casue then you will have other problems
OP..........
test the battery AND the converter
THEN you can buy new battery AND converter to resolve your issues