I’m watching this thread with some interest as I have a bit of a dilemma. When I bought my coach in 2012 the large AGM 4D house batteries (4 of them) made by Lifeline, were ok but starting to show weakness. So in 2014 before going on a trip where I knew I needed to have good batteries at times, I replaced them with batteries sold by a local solar company. They are Chinese made, and although specs were good, I have 2 failing already. So I’m looking to replace them.
If I go back to Lifeline 4D AGM, prices are in the ~$700/each. Other manufactures maybe in the ~$550 range - a lot of $ for batteries which I hardly use/need. I do have a residential fridge, but the coach is always plugged in and/or the genset is used or the alternator keeps them ok while driving.
So I am thinking of changing them out and replacing them with 4 (or maybe more) 6v AGMs. I know there is some rewiring involved as the the big 4Ds are 12v but a group of 6v will give similar reserve and are more manageable and less costly.
If I went to batteries like Chuck ordered, I likely would be ok and for much less outlay.
I guess the point is the batteries I bought that looked good, have started to fail. Caveat emptor. Interestingly I had changed out the Lifeline chassis batteries in 2013 and replaced them with a Cat equivalent AGM and they are still good.
Appreciate any thoughts.