Low-carbon energy technologies:

Electricity: moving towards distributed generation
A combination of established and new technologies is being developed to meet the demand for on-site (distributed) generation.
Hot water solar collectors
Hot water solar collectors have been a popular source of renewable energy in the UK since their introduction in the 1970s. A tried and tested technology, they can be expected to deliver around 40 - 50% of annual domestic hot water requirements.
Photo Voltaic (PV) Cells
An established technology, Photo Voltaic Cells are a useful source of power. Though often an expensive choice, PV power can perform an essential role in on-site provision of electricity.
Ground Source Heat Pumps (GSHP)
Where installed judiciously, GSHPs are capable of contributing to hot water demands. This is particularly true for low temperature heating more so than for DHW.
Small Scale Wind Turbines 1 - 6kW
For most urban applications, domestic-scale wind turbines are unlikely to live-up to expectations - but for areas where undisrupted high wind speeds are available, they can generate electricity that would otherwise be drawn from the grid.
Biomass
Power generated using biomass-fuelled plant is set to mark an important contribution to energy production at scales stretching from grid power, through community generation to small domestic applications.
Micro CHP
With over 30 years of technological development behind them, micro combined heat and power units are being introduced into the market to replace domestic gas boilers.
Fuel Cells
Fuel cell technology has been progressing slowly. Development has been mainly concentrated on transportation, but with their application to CHP, fuel cells are looking to make a significant contribution to domestic heat and power provision.
Thermal Storage
The principles of thermal storage address the problem of heat being generated at one time of the day, when needed at another. Though appearing similar to conventional hot water cylinders, they are very different in operation.