Domestic wind turbine was useless so was returned. Installed 2 Solar Thermal panels in September 2006, 18 Solar PV panels in May 2009 and in May 2013 a 14KW Air Source Heat Pump in place of the gas boiler. The Solar Thermal panels never worked very well with the original system and gas boiler. With the new ASHP, the Solar Thermal panels are now working very well, providing us with all our hot water free from the sun on most days. The electricity generation from the Solar PV panels are performing as proposed but the last 12 months have been lower due to the lack of sunshine. As an early installer, I have not benefitted from the generous FIT payments. Still looking for suitable LED replacements for halogen lights.
Retired, living with my wife in a detached dorma bungalow built in the 1960's with almost no insulation. We are interested in reducing our domestic carbon footprint as much as we can without moving. After double glazing and cavity wall insulation, we spent £8000 on roof insulation with 75mm Kingspan between all the rafters.
Spend as much as you can on insulation and draught-proofing as you can afford. Use Solar Thermal panels with a heat pump, a combination that works well together. Visit and talk to others who have already installed what you are planning to do to get the benefit of their experience. And most important, find an installer who is both experienced and really know what they are talking about.