Benefits of domestic wind
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Generate electricity at home with
small-scale wind turbines. Wind turbines harness the power of the wind and use
it to generate electricity. Forty percent of all the wind energy in Europe blows
over the UK, making it an ideal country for domestic turbines (known as 'microwind'
or 'small-wind' turbines). A typical system in an exposed site could easily
generate more power than your lights and electrical appliances use.
benefits of wind energy
Cut your electricity bills
Wind is free, so once you've paid for the initial installation your electricity
costs will be reduced.
Get paid for what you generate
Through Feed-in-Tariffs, you get paid for the electricity you generate even if
you use it. What you don't use, you can export to the local grid - and get paid
for that too.
Cut your carbon footprint
Wind electricity is green, renewable energy and doesn't release any harmful
carbon dioxide or other pollutants.
Store electricity for a calm day
If your home isn't connected to the national grid you can store excess
electricity in batteries and use it when there is no wind.
Costs, savings and earnings
The cost of a system will depend on the size and the mounting method:
building-mounted turbines cost less to install than pole-mounted ones. For
equipment and installation, with VAT at 5%:
a roof-mounted 1kW microwind system costs around £2,000
a 2.5kW pole-mounted system costs around £15,000
a 6kW pole-mounted system costs around £22,500.
Maintenance checks are necessary every few years, and will generally cost around
£100 to £200 per year depending on turbine size. A well-maintained turbine
should last more than 20 years, but you may need to replace the inverter at some
stage during this time, at a cost of £1,000 to £2,000 for a large system.
For off-grid systems, batteries will also need replacing, typically every six to
ten years. The cost of replacing batteries varies depending on the design and
scale of the system. Any back-up generator will also have its own fuel and
Building-mounted turbines tend to produce less electricity per kW than
pole-mounted ones. A well-sited 6kW turbine can generate around 10,000kWh per
- equivalent to around 5.2 tonnes of carbon dioxide a year
- generating income and savings, if eligible for Feed-In Tariffs, of around
£3,200 a year
How do wind turbines work?
Wind turbines use large blades to catch the wind. When the wind blows, the
blades are forced round, driving a turbine which generates electricity. The
stronger the wind, the more electricity produced.
There are two types of domestic-sized wind turbine:
Pole mounted: these are free standing and are erected in a suitably exposed
position, often around 5kW to 6kW
Building mounted: these are smaller than mast mounted systems and can be
installed on the roof of a home where there is a suitable wind resource. Often
these are around 1kW to 2kW in size.
( Reference: ww.energysavingtrust.org.uk/
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