It is a good solution, but we must not think it solves everything without a little bit of thinking. There do come problems with it, e.g. growing of monocultures for energy crops, energy-inefficient production of the hardware, the loss of land used for food, problems in grid management b/c volatil power supply leading to blackouts,
All of these problems have to be solved; btw saving energy is still the best way to stop the climate change...