Unfortunately the solar craze focused on helping the water heaters out. Basically you had large 100 square foot solar panels on the roof and the cost back then was $3-5K. The systems were breaking down long before getting anywhere near break even. I am glint to have to look up the new community I mentioned. Apparently the electrical solar panels blend in with the roofs and don't really look like an add on, most of the roof is the solar panel. Very close to where I live is a concrete business center. At least one of the concrete buildings has underground cooling. The owner had this set up installed after he built the building. Concrete being a poor insulator was a pretty good test to see how well the cooler worked. The building was almost chilly during the summer months IIRC and his electric bill was less than mine. He was an AutoCAD distributor and offered training with several computers and projectors contributing to heating up the large rooms.