Keeping dingy battery charged while towing
I have a 2010 Roadtrek 210 Popular and just bought a 2018 Kia Soul as a dingy. It's manual transmission and towable. I know the key needs to be in ACC position to allow front wheels to steer, but I am looking for a power pack or similar unit I can plug into the lighter socket to keep the battery charged while towing. Any suggestions or other ideas?