We bough our Lance this year. The 160w solar option was somewhere between $400-500, can't recall the exact number but I'm leaning towards 400 range, maybe 450. Price wise, this this is pretty much the cost of parts if you were to do it yourself. I imagine they get a much lower cost for the parts than I would, giving them a better profit margin and still sell it for what they are.
I spent about $500 and installed my own plus got 200w instead. I called Lance for assistance in determining the depth of the roof, where they run the wiring when they factory install it, and they were nice enough to wish me luck and emailed me schematics and diagrams on how they do it at the factory.
Good luck in whichever you decide to do!
