An average capacity factor of 21 percent is used for micro wind, compared to 55 percent for conventional technologies such as coal, natural gas, and oil power plants. (drawdown.org)
Also to meet that capacity it would have to bring in short term coal or oil powered stations. (dotearth.blogs.nytimes.com)
However, it does also own coal and oil power stations, although it is shifting away from coal and more towards renewable energy, alongside gas. (ethicalconsumer.org)