Two 6v golf cart batteries wired in series to make 12v. BCI group GC2, 6v, ~200-250AH, dimensions LWH 10.25x7.125x11.875, weight ~65-75 LBS. Cost ~$100-150 (plus ~$35 core). All of that is per battery. They are on the large and heavy side, and they are a flooded lead acid battery so they will...