maximizing battery capacity

I have to say for myself anyway I find it a bit overwhelming how much there is to learn about an rv electrical system when solar is involved. Thank you Almot for dumbing it down for me a bit. I now have a better understanding and see that I do have some options for more battery capacity given the limitations of room I need to endure. The Torklift battery cradle thing is an idea but might be a hinderance when going off-road. I like the idea of AGM because the can be mounted on their side making the best use of space in my battery house. Too bad lithium batteries cost so much. Ton of amp hours in a smaller lighter package but cha-ching$$$