I think you're going to have to change your pricing model / plan of attack when it comes to selling in BTC. You need smaller kit. I doubt you'll be able to sell installation given who the current users of btc are.

Personally I might buy some product if you ever accept bitcoin - but I'd want it to be somewhat modular where I can choose the wattage I need and set it all up myself.

Honestly, you'd probably do better simply shipping all the parts of a panel for some lower price and letting people buy as many or few as they need.

AKA in this community, if we need solar we just buy b-grade cells for a buck a watt and assemble ourselves =P