~ Many have asserted that renewable energy generation is impractical because it is too variable and too intermittent. Not true, as installations in Spain demonstrate:
Gemasolar, which officially launched last month (May 2011), is a 19.9-MW plant with a 15-hour ‘battery’. Gemasolar’s expected production is 110,000 MWh per year—or about enough to fully power 25,000 households. Because it can store energy, this 19.9 MW generates the equivalent of a 50 MW solar power plant without storage, according to Mr. Arias.Gemasolar, and similar renewable energy generation installations is part of the solution that allows us to create a renewable energy future. It is possible with wind too.
Gemasolar’s battery consists of two tanks of molten salt thermal energy storage that allows the solar plant to generate on-demand electricity: during the evening, during cloud cover or rain, or even days or weeks later.