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Savings & Earnings

Savings & Earnings

Earnings

Wind power is directly proportional to the “cube” of the wind’s speed, so small increases in wind speed potentially result in large changes in output. Wind turbines vary in size and power output from a few hundred watts to large megawatts. A typical domestic wind turbine system is between 1 – 6 kw.

The main factor affecting the output of wind turbines is the average wind speed. This varies for different areas of the UK but increases with the height of the wind turbine above ground level. Local topography can significantly impact upon local wind speeds. A small difference in wind speed will make a large difference to output.

 

A Calculation

The installation cost of a 15kw free standing mast erected wind turbine should not exceed £50,000 and should generate circa 25,000 kilowatt hours on a typical windy and exposed site with minimal turbulence.

Assuming a proportion of the energy used, replacing grid electricity, the figures would be marginally improved:

15 kilowatt wind turbine sited in a good location:
Annual output 25,000 kWh
FiT Rate 26.7p per kWh
FiT Annual Payments £6,675.00
Export Rate 5p per kWh
Export Annual Payment £1,250
Less Annual Maintenance Cost £750
Annual Gain Total £7,175.00
Return 14.35%
Payback Period 6.96 years

 Or

1.5 kilowatt wind turbine sited in a good location:
Annual output 00,000 kWh
FiT Rate 26.7p per kWh
FiT Annual Payments £.00
Export Rate 5p per kWh
Export Annual Payment £
Less Annual Maintenance Cost £
Annual Gain Total £.00
Return %
Payback Period  years

 

Savings

Using wind to reduce your electricity costs makes excellent economic sense. And can significantly reduce or even eliminate your home energy costs.

For a wind turbine to be fully cost effective you would want average wind speeds of above 4 meters per second. However, if the area that you live does not have high consistent winds to produce consistent reliable energy, a small wind turbine can still be used for your supplemental energy needs.

In most areas, winds are stronger during the winter months; this coincides with the energy cost increases that occur during the winter due to heating needs and reduced daylight hours.

With energy costs only increasing, making an investment in a home wind turbine will give you many years to pay back the investment as well as reduce your home energy expenditures. Particularly for people who live in rural areas and are able to locate their home wind turbine away from buildings, trees and other obstructions, thereby increasing the average mean wind speed, the savings generated by a small wind turbine can be substantial.

EEA Regional Award winner EEA National Award winner EEA National Boiler Award winner MCS Elecsa REC FGAS BPEC Green Deal