Agree with others above. Even though you flipped the red switch, there are still other items drawing on your battery. Basically, that switch cuts off all lights and cuts off the converter.
If you plug in your camper to shore power then, the converter is still separated from the battery and will not charge. The house lights will now turn on though. But that is because they are being powered by the converter which is being powered by shore power.
Basically, that red switch is probably best used if, for some reason, you have to remove the battery and you don't want a current running to the un-attached ends of the cables that connect to the battery. The last thing you want is for the red (positive) cable to touch anything metal. This will imediately cause a short and will damage your converter.
THAT really is the only time the red shut off should be used and the only time it really makes sense to do so.
Again, if the battery is completely removed and you are also plugged into shore power, flip that switch. Otherwise, it really serves no other purpose.
If you want everything completely dead, then disconnect the ground wire from the battery (black wire) or, install a cut off switch for the negative (black wire). This truly turns everything associated with the battery off. But, again ... if you plug into shore power, the converter will still work and will still power everything DC, but not the battery.
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2019 Montana High Country 375FL
2014 Chevy Duramax HD 6.6 - 3500 Diesel Dully Long bed Crew Cab
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