First off, we like the vans that MAD builds out for their own label, for American Coach, and for Fleetwood. However, for that lithium package, take a look at their water heater solution. As I recall, it's electric only, and it's a tank (e.g. not an on-demand solution). No propane, because there's no propane in the van. Make sure you're OK with the performance profile - how much electricity will the water heater eat up over time if you're dry-camping? If the numbers work for you, I'd suggest the IROK could be a great choice. If not, look elsewhere for a lithium-equipped van.