These are some batteries I was able to get my hands on. 20 year old Edison battery cells from an Airport Radar system.
There is a total of 150 cells, 60 x 100Amp cells divided into 6 x 12v packs and 90 x 30Amp cells again divided into 9 x 12v cells.
This give an estimated 870Amp battery pack.
I only have 3 x 80W solar panels attached with no regulation at this stage. Once I have more panels, I will look into it further.
A 1500w pure sine wave inverter is hooked up running a fridge. This is not expected to run 7 days a week until there is more solar panels installed.