Coach Battery Replacement Help

Wannabrving wrote:
I think I have "Googled" myself into confusion! I have a 2000 Four Winds Infinity (35') that I bought used in 2009. I had one of my three 12V coach batteries to go bad (boiled, gurgled, leaked, smelled). I am planning on replacing all 3. The three batteries are all Interstate Workaholic 31-MHD's, which I do not think are Deep Cycle Batteries, and not sure they are the proper type batteries for coach use. The chassis battery is a deep cycle--which confuses me also. All the batteries are the ones that were installed when I purchased the RV. I was going to replace the Interstates with similar replacements; however, if they are not deep cycle, I do not know that is a good idea. I have also considered the AGM, but I have read some posts where the AGM's could create a problem with the RV's converter. Right now, I am just interested in replacing the coach batteries with the proper type, without having to worry about doing anything with the converter. Any comments and/or suggestions to alleviate my present confusion is greatly appreciated!

I believe you are correct that the 3 31-MHD's are starting batteries. The specs in the link do not list AHs at all.

If you are considering AGMs because you don't want any more acid spills, you might consider GRP-31 from Sears Platinum or Sam's Club AGMs. The Sam's Club near me (73132) has them for $180 which is $28 more that the replacement $152s. You may not need a newer converter.

Be sure and have the expert flooded folks around here explain the special procedures and charging equipment you might need if you switch to pure deep cycle batteries.

The AGMs are dual purpose and will also be fine as a drop in chassis battery.

HTH;
John