On average, a subscriber will use about 5 kilowatts, which are roughly 15 to 20 panels. The Clean Energy Collective operates about 20 solar gardens in Colorado now and about 40 nationwide. Gardens open on land that is virtually unusable already, like next to landfills or airport runways. In the case of Aurora, the garden is on land with contaminated groundwater from the Buckley Air Force Base. There are two ways to participate in the Solar Rewards Community program. Xcel customers can purchase panels for as little as $1,000 through the Clean Energy Collective, or a city can become subscriber organization and sell or lease shares of the garden to customers.
First stumbled upon at http://www.dailykos.com/story/2014/06/21/1308667/-Buying-into-community-solar-gardens-solar-power-not-just-for-people-with-roofs-anymore