House Battery Dies Quickly

paulgreenwood1 wrote:
I own a 2004 Coachmen Mirada class A. Last year I replaced the house battery. Now my battery won't run my ac for more than a couple of hours before dying. As I live in Florida, I figured maybe the heat was killing the battery, but, after further reading, I'm not so sure. Can anyone suggest why my battery dies so quickly? Is there a way that I can check if it is being charged sufficiently when rv engine is on? I do alot of boondocking, so my HB is usually only being charged when I drive. I have noticed, however, that when I camp and am plugged in, the battery also does not last long after disconnecting from shore power.When the rv is not in use, I make sure to push the battery disconnect, so it is not in use when sitting for long times idle.Maybe just a bad battery? It is deep cycle marine battery.

What is AC if you are saying airconditioner I think I can help. STOP trying to run the AC on one 12v battery. You can only run the AC from shore power or when the generator is running. You have probably ruined that battery by over discharging it repeatedly. The only way to know is to charge it fully charge it then load test it.
You say you do a lot of boondocking I would upgrade to at least two 6v golf cart batteries, if you have room I would try for 4. You still won't be able to run the AC on battery power but the batteries will last longer boondocking.
Bill