MACRV,
I don't know about the 2003 model, but my 2000 Endeavor doesn't charge the chassis batteries from the inverter/charger. I put a battery maintainer on the chassis batteries. Good luck.
dreamer.
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'07 HR Scepter 42 PDQ - ISL 400
'16 Chevy Silverado - Blue Ox - M&G Braking System
'19 Honda Talon 1000R, '02 Tracker - Blue Ox
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