Private capital around the world and in America is flocking into renewable energy. Duke Energy offers just one example.
Since 2007, Duke Energy has invested $1.7 billion in about 1,000 megawatts of renewable energy, mostly at 10 wind farms, but with solar gaining investments now. Duke's latest renewable investments are 2 solar farms in Arizona that provide a combined 20 megawatts. See http://www.solarbuzz.com/industry-news/duke-energy-renewables-acquires-two-arizona-solar-farms. Duke has about 45 megawatts of solar total or about 1% of all US solar installed by the end of 2011.
Duke is gaining experience in solar and is an example of the major power companies that don't want to miss the solar boom that has begun.
Sharply escalating private investment in solar is part of annual capital investment in renewable energy generation projects around the world that approaches $200 billion and is comparable to or exceeding investment in fossil fuel power plants. Duke's plunge into renewables is one American example of this global phenomenon.