I'm waiting to here back from a gentlemen who was going to look at those details at the Tampa RV show for me.
Surely solar can be retrofitted - there is alot of free space on that roof. But it would require drilling a hole in the roof and routing the wires.
The battery may be another story. On the 59G, there is a frame bolted underneath the van that holds the single battery. If the 59K uses the same location, but uses a larger frame to hold two batteries, then that may be a part that can be sourced and bolted to a 59G.
Another alternative would be to put an additional battery under the dinette seat and run the wiring to connect to the existing under the van. You'd have to build a platform for it and figure out how to secure it and run the wires.
