I equipped my 2008 OFF-ROAD Camper with four each 12VDC GP24 85AH Interstates. I lost one right away due to over charging with the oem single mode ELIXIR 30A Converter. Changed that out for a PD-9260C 60A SMART MODE Converter and the remaining three GP24 Interstates are still working. They are however slow now recovering from a 50% discharge state. Not bad for the 7-8 years of use.
Did many daily 50%-90% two week camping trips over the years...
I am just now working on a new battery box and want to go with with two groups of Trojan T105's 6vDC batteries in series... Would really love to replace them with the Trojan 12VDC T1275 150AH batteries but can't afford the expense haha...
My new battery box is retrofitting the batteries and dual group switch gear and monitors in a Torklift A-7710RS Metal box... Work in progress
Roy Ken