There has been a lot of exciting change of late within the microgeneration sector. On the 12th November, the Green Energy Bill was made law - this Bill states that all microgeneration technologies, including wind turbines and air-source heat pumps (subject to size limits), will be as of the 12th January 2010 exempt from planning permission in or on domestic premises within England and Wales. This is great news for all those interested in or currently in the process of installing renewable energy technologies.