Originally Posted by MattM
Solar panel says it's charging battery during sunlight. Evening time while dry camping running genset for 3-4 hrs, we go to bed with no electrical appliances on, and by morning the batteries are dead. The batteries are less than a year old. Another odd thing: now when I start genset via engine motor, it will run but when I pulled in one slide, the genset quit. I re-started it and pulled in another slide and genset quit again. Anyone have any ideas where the problem is? I check battery water frequently. Genset is exercised regularly and it has a new carb.
Here is an easy check for an internal short of the batteries. When you are not going to be using your coach overnight, plug it into shore power for the day so your batteries are fully charged. Unplug the coach and check your battery level lights - should be 4 or 3 lights. Turn off your battery disconnect and leave it sit for the night. If there battery level lights have dropped to 2 or 1 light, you have an internal short. Your batteries should have no problem maintaining full charge overnight. I know using a voltmeter and ammeter is much more decisive, but this is an easy check that could immediately tell if the batteries are the problem. By the way, having 3 lights on the meter in the morning does NOT mean you DON'T have a battery problem. It just means more investigation is necessary.