Maintenance Free Batteries ain't Maintenance Free

Got mine 5th wheel new in February 2008. Paid extra $200 for super duper deep cycle battery. I keep my 5th wheel plugged in all the time at home and have never checked the water level in the battery. The cat has been sitting about two months. Went in it and the idiot lights (level indicators) showed battery empty. The 12 volts lights came on but were very dim. Sure enough you couldn't see acid in the battery. I filled it with about 30 ounces of distilled water. Interesting enough I unhooked the battery and had to get little plastic pieces (2 in each cell) out to get the stoppers out, and the propane gas alarm would go off with battery disconnected. Also after hooking it back up, the converter didn't start running so I put the tickle charger on the battery. 10/20 minutes later the level indicator show FULL. Go figure. I am going to leave the tickle charger on all night.

Any thoughts, comments or ideals on this concerning the converter?

Theres lots of topics on batteries in the maint. forum.
I'd install a battery disconnect instead of leaving the cat plugged in. Thats a lot of wasted money on your power bill. Your converter may have boiled the battery trying to over charge it.
A lot of us have installed the disconnects that have a Key you mount above the battery box and just turn the key off when you park it for a while. The gas detector , and other stuff use a good bit of battery power when left on.

The propane sniffer and the Concertone will kill my battery in 2 weeks.

But, I always check the water in mine.

Currently, my fuses are pulled in the sniffer and Concertone.

I'm not sure which convertor is in your model but the one that came with mine would surely have cooked the battery if left plugged in that long. It's a pretty cheap upgrade to get a smarter charger. I'm also going to install a cutoff switch before next season.

After my battery went down again in two weeks after being charged and also being plugged into power, decided to take it to Wally World for a load test. Test said that it was low and needed to be charged . The service tech said he sees a lot of that and most people just replace the battery. He also said they sell a whole lot of batteries. So anyhow I purchased a new marine battery, deep cycle type. I didn't see it when I took the old battery out of the battery holder, but when I went to put the new battery in I saw a lot of water in the bottom of the battery compartment case. Because I had put so much water in the old one I can only assume it had have a crack in it. Warranty on marine batteries are only for 90 days. Wonder what would happen if I put in a car battery that has a 7-9 year warranty. Any comments on that. The tech said that a car battery wouldn't last very long if it gets discharged and recharged a lot. Oh by the way I downloaded the converter troubleshooting sheet and checked it and it seems to be working fine.