From the article:
The $2.2 billion complex of three generating units, owned by NRG Energy Inc., Google Inc. and BrightSource Energy, can produce nearly 400 megawatts — enough power for 140,000 homes. It began making electricity last year.
By my (non-Common core Math) that equals approximately $15,714 per house for the electricity. I knew electricity prices were high, but THAT HIGH???