Our system was about 9k. That included everything, panels, lithium battery cells, solar charger, inverter/charger, cables, gauges, specialty tools. Everything but the elbow grease.
Seems like a lot, but if you itemize your taxes there is a 30% credit, and we ordered our camper without the $4,100 Onan generator and the $400 dual 6v batteries, the net really isn't that much compared to buying the camper with a generator and golf cart batteries.
It is nice having a quiet, renewable source of power that runs the entire camper. Even after generator hours are over. ;-)
