1 Block Off the Grid aka 1BOG
"One Block Off the Grid can help with that. 1BOG forms cooperative groups of homeowners in cities across the U.S. When a city has 100 to 150 households registered (at no cost or obligation) they guide the group through the process. They find the contractor, arrange for everyone to have a site study, get the bids and then they negotiate with the contractor and the suppliers to get the best deal for the group. Then group members can decide to participate or not.If nothing else, check out their website. Now is a great time for residential solar because the federal and state incentives have never been better."