I have a 2018 Grandby Shell, with factory solar set up but no shore power plug. When I store the camper in the garage, the solar panel obviously can't keep the battery charged and I'm too absent minded to remember to disconnect the battery cables every time I put it away. I've forgot twice now, and both times the battery was drained.
I can look for a shore power kit, drill holes in the side of the camper, figure out how to tie it into the existing solar system, etc. But why not use the existing solar plug that's meant to plug in a portable additional solar panel? Maybe some kind of DC power supply that I can plug into an outlet in the garage? I have a pigtail for the external solar plug, I'm just not sure exactly what needs to be done.
I don't think the power supply needs to be 100 watts, since it's basically just keeping the battery charged with no load on the system.
Has this been done already, with a good how-to posted somewhere? I didn't find anything like this using the search function here.
Is this a really bad idea somehow? Looking forward to some feedback.