This is a recent job that we did for a client converting a Kimberley Karavan from ~120kg of lead to 28kg of Lithium. This time we used two of the EVH12V120AH batteries connected in parallel for 12V 240Ah, ~3kWhrs of storage. A very neat fit in the KK box!
Note that we used dual 100A circuit breakers to connect the two batteries to the 12V system. The advantage of this is that it is easy to isolate the batteries from the van and from each other when the van is being stored. We do not recommend continuous charging during storage. That was fine for lead batteries, not for Lithium.