Originally Posted by Camper_bob
I think this is what happened to my battery. I was VERY anal about keeping it charged. I would always disconnect it and keep it in the garage on a float charger, always checking the water level and topping off with distilled, etc. Ever since I had warranty repair done on my trailer last year, battery hasn't been right. It was almost totally dead when I picked up my trailer. Now it won't hold more than 12.46V
It was just the standard Interstate Group 24 anyway, so I'll upgrade. Just have to decide which one(s) I want!
I had two 12V marine batteries that were in need of replacement. Napa had a sale on their local brand 6V batteries. I did a cost comparison between 2 6v and 2 12V batteries. the 6V batteries were cheaper AND I ended up with more battery capacity than had I bought 12V replacement batteries.
When my trailer sits for any length of time, I pull the battery fuse, but keep shore power plugged in. Then a couple days before the next trip, I use my 10amp battery charger to charge the batteries, then reinstall the fuse and let the inverter maintain float.