Lets start with basics
Brand/Model Of INVERTER
Brand/Model Of CONVERTER
How many 6V batteries...2 wired in series OR 4 total with 2 wired in series then the 2 groups wired in parallel?
Converter....Reverse Polarity Fuses
Check if blown.....no charging and no battery supply'
Large 30A or 40A fuses ON converter
Battery in-line fuse....follow Battery POS Cable
S/B an in-line fuse on POS Cable CLOSE to battery (OR DC Circuit Breaker---small box with 2 studs...small reset button on side)
IF BLown---no charging/no battery supply
Jacks/Slides etc are typically wired DIRECTLY to battery POS posts due to high amop draw...have their own in-line fuse protection
So not surprised they work when not connected to AC Power
