Wow! Thanks so much for the detailed response. Regarding the water, yes the previous owner mentioned the line would keep breaking so he just capped it off. That is a lot of screws to get at a battery....lol. I'm thinking I would like to run a mini inverter up from it for some device charging. Is it the same charging method? Solenoid at the front? Also when shore powered, is there an inverter in play? Oddly l had no idea so many differences.?