Hi All, Tried to find an answer to this by doing a search on the forum but gave up after the 6th or so page. My MH has one leisure battery. When hooked up, it reads 14V. When freshly charged it reads about 12.1-12.3V. When a couple of lights (not LED) and the music is on for about 2-3 hours and some usage of the water pump, it goes down to around 11.2-11.5V. Question 1: Does this sound reasonable? My heating runs on gas. Question 2: To what voltage do I let it drop before I worry about damage to the battery? Question 3: Would running the car on idle for 30mins or so make a big difference? I am under the impression that the alternator does not produce any decent charge unless the engine runs at least 2000rpm Final question: How many batteries should I have If I want to be independent for at least 36 hours with lights, some music or TV for some of the time? Thanks lots in advance!