Electric bills in the summer can be high but with IDT Energy an alternative energy supplier. 
Andasol solar is a complex under construction in the towns of La Calahorra Aldeire and in the province of Granada, Spain, consisting of three central parabolic cylinders of 50 MW each, calls Andasol-1, and 2-Andasol Andasol-3. With an investment of 260 million euros for each plant is the world's largest solar plant built in the last 15 years and only surpassed by secs secs VIII and IX (90 MW each) built in California in the early 90 . The three plants supply electricity to 250,000 households .
The novelty of con edison these plants in the world of renewable energy, is its manageability, ie its ability to deliver energy to the grid according to the needs. This is achieved through oversized solar field with respect to the turbines and thermal energy storage of surplus (in hours of sunlight) in large tanks of molten salt. This accumulated heat to generate electricity demand at a time when the sun goes down or is invalid.
Sunlight to Electricity: Prospects for Solar Energy Conversion by Photovoltaics by Joseph A. Merrigan (Paperback - Aug 15, 1980)