12 volt Flooded Lead-Acid, size 27, probably Thomas Battery -in the range of 100AHr each. This is what a 2015 A , H, W coach came with.
For house batteries, you need deep cycle (flooded or AGM) in about the same size (24, 27, 31) as the deep cycle will have lugs post rather than round post for the battery connections.
Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow