I did quite a lot of research to find as many Amp Hours as I could fit into a limited space.
I'm sure these are not nearly as common as using a couple or even three 12V-12Ah AGMs but I wanted range and I didn't want to have to use more than about half capacity for my trips. As we all know, the less you deplete SLAs, the more cycles they are likely to give you.
I have two battery banks in my array.
Each bank has 4 batteries in parallel. (8 batteries total)
My system is 24V so I placed one bank in series with the other ... A series/ parallel system.