The majority of energy lost from an uninsulated building is through the walls and loft.
Productivity of a wind turbine is directly dependent on the annual average wind speed at a given location. For example, a 5kw turbine could produce as much as 9000KWh a year where the average wind speed is 5ms-1. If the average wind speed is 8ms-1, this could rise to an expected annual yield in excess of 20,000kWh.
Wind turbines work best in wide open spaces far away from obstructions. Small wind turbines will typically use a permanent magnet generator to produce electricity. This ‘green’ electricity is then fed into an inverter. The output power from the inverter can be distributed to the grid or used in an off-grid standalone configuration. A well-maintained turbine should last more than 20 years.