I am thinking about upgrading to a 24 volt system, if I do I will buy two new batteries. Any suggestions on brands?
I just bought 3 of the everstarts also for my 36 v system. They have " johnson control " stamped right on them. Paid $300 plus tax at walmart
Just replaced my 6 year old interstate batteries (36v system). They still worked fine, but I would not get the extended runs I prefer out of them. They are now backups on another boat. Replaced with like kind.
I have 3 blue-top Optimas for my rig, 2 are 10 years old, one is 5, and all are as strong as day one. Of course I have a 3-bank onboard charger that allows for automatic charging TLC...Paid maybe $210ea...
I have interstate batteries from CarQuest. It's the CarQuest brand but both are made by Johnson Controls.
I too use interstate. What ever you buy, get two new ones the same size. Take care of them, charge them nightly after each use,they will last you a long time. On one boat, I got 8 or 9 years from a set of batteries that I took care of.
I've had great luck with the Walmart Evertstart 29DC, I use them for my starter and my trolling motor batteries.