Is there an RV electronics book for dummies? I have a short battery life, it seems to me, and the coach has two new marine batteries. True, there are LEDs on the tv, stereo, vcr, refrig, antenna power, coach power switch, propane leak detector, etc. I never thought LEDs took much juice, though. I camp and run the vent fan for a few hours. Use the water pump a few times. Turn on a light or two. After about four hours of this, if I don't run the generator for 30 minutes I won't make it through the night. I'll have to cut off all coach power in the night to keep the alarm from sounding. Then in the morning when I cut it back on, it's as if nothing was wrong. I have plenty of battery!