When I saw this topic I had a flash-back to my RV battery research a few years ago. I had reached a point of maximum frustration with RV batteries. A repair mechanic told me most wet-cell batteries were lasting a year or less. He felt that was because they were coming from China and the Chinese had reduced the amount and quality of the lead plates in their production. He suggested I read the complete on line info to be found on : “the 12 volt side of life”.
I googled.....the 12 volt side of life....and learned a lot.
I strongly suggest all RV owners who boondock and need reliable battery power take the time to read this very informative article. I replaced my wet cell 12 volt battery with an AGM 100AH battery and added a 12volt digital volt meter to keep an eye on my battery during long boondock camping trips.
If you boondock consider a quiet Inverter Generator
$$$ !.....or consider a solar
battery charger to maintain your battery.
Good Luck and happy camping !