Your 16" high battery (the Rolls) isn't going to fit anywhere reasonable on a PC, let alone 4 of them plus they weigh about 120lbs each wet.
You might as welk specify diesel submarine batteries.
Your 4 Trojan batterirs will give you 204 AHrs at 12v.
My two Lifeline GPL-4CT 6v AGM batteries give me 220 AHrs @ 12v. Of course they cost more... $600 for 2 of them but well worth it since the fit the battery tray. No need to McGuyver anything.
Oh I know the big batteries were not practical. That was my poor attempt at humor saying it would take a LOT of work to fit in an old Club Car..

I was just curious if there was such a beast.
Unfortunately, in my 2006 the only factory option is (1) group 31, high up and in the back over the rear axle. I think even the optional tray (just in front of the right rear tire) had to be modified to take (2) 6V , Ron has a good post on how he did that.
So... being that I have to design my own tray, go big, right? And put it as close to the front as possible.

Correct my math if its wrong, but I will have (4) 102AH 12V batteries in parallel - Wont that give me a 408 AH pack? If I had gone the 6V route, it would be 440AH.
I guess if you keep it above 50% discharge there only is 204AH 'usable'. But then yours has only 220AH usable also.

But, as you state the 6V AGM would have run me $1200 for four. ($600 for two, times two)

I got the (4) 12V AGM for a little over $200 out of pocket. Yes, a sweetheart deal from our battery supplier.
I will size the tray to allow 6V also, so when replacement time comes it will be on the table. Cant wait to get home tonight and get under the coach with a tape measure.
To charge this pack in a reasonable time off the generator, I am looking into an IOTA DLS-90-IRQ4 (
https://www.amazon.com/DLS-90-AUTOMATIC-BATTERY-CHARGER-SUPPLY/dp/B0074JVP2C ) I have been on the phone with the factory, and they say they should be able to modify the charging profile to match the Trojan AGM's I have. As delivered, the bulk rate is just a little too high according to Trojan spec's.
Battery monitor will be HandyBob's favorite... Trimetric TM-2030-RV Battery Monitor System.
https://www.solar-electric.com/bogart-engineering-tm-2030-rv-battery-monitor.html?gclid=EAIaIQobChMIiZ7PmeT92AIVFBuBCh1e4wQUEAQYASABEgIgJvD_BwEBoth together should be a dynamic pair, and ensure long battery life. Also has me 'poised' for adding solar, as the Trimetric 'talks' to the solar charge controller.
