Costs, savings and maintenance
If placed correctly, the benefits that can be gained by installing a small wind system dwarf the costs associated with it. Because wind turbines are suitable for a relatively small proportion of householders, not many installations have been carried out compared to more common technologies such as solar PV. This means that the Feed-In Tariff provides a very good return on your investment.
It is even possible to choose from a range of financing options to cover the upfront cost of systems and their installation. The government is leading the way on this with their new Green Deal initiative.
Costs for a roof mounted 1kW micro-wind system are around £2,000. Mast mounted systems have a larger capacity and cost between £15,000 and £23,000 including VAT at 5% and installation. The larger a system’s capacity is, the more expensive it is, but the more electricity it can generate, earning you more in FIT payments. Find out which size system is best for your home using our free home assessment. Where you put your turbine matters just as much as your turbine’s capacity when it comes to how much electricity you will generate – see our guide to the Installation of Wind Turbines for more information on this.
If you cannot afford the upfront costs of installing a micro-wind turbine, a loan provided by the Government’s Green Deal Scheme could fund the installation for you. This makes the installation in effect free to you, as the savings you make on your monthly energy bill with the turbine are used to repay the loan. These repayments should never exceed your savings. However, these payments do include 7% interest, and so you will make more of a saving over the life of the system if you pay for the installation yourself. Our Green Deal page has more information on the Green Deal scheme.
A typical, mast mounted system on a site with an average wind speed of 5m/s can give you a saving of approximately £350 on your energy bills. You will receive around £160 a year in Export Tariff payments at current tariff rates and around £2,700 a year in Generation Tariff payments. These payments will be paid from when you apply to the FIT scheme for twenty years, with the tariff rates fixed and linked to inflation throughout the period. Under these tariff rates your turbine is likely to pay for itself in 7 years or less. After the system has paid for itself, you will continue to make savings on your bills and receive FIT payments for another 13 years. For more information on the FIT scheme please visit our visit our FIT guide.
A well-maintained turbine system should last for over 20 years, and most turbines will be guaranteed for that time. During the system’s lifetime you may need to replace the inverter at a cost of around £1000-£2000. For off-grid systems, battery life is typically between 6 and 10 years. Your supplier will be able to let you know if you will need to carry out any maintenance checks on your system. It is usually recommended that you get your system checked by a professional every year at a cost of £100-£200.
Estimate the income you could earn from your home using a turbine with our Energy Assessment.
- Will a wind turbine work if I live in a built up area?
- The industry tends not to recommend that a domestic wind turbine is installed in an urban environment for a number of reasons, including: increased turbulence, resulting in higher stresses on the turbine and lower energy capture for any given wind speed; increased margins of safety required when more people are living and working near the turbine; additional measures possibly required to limit the transmission of vibrations into the structure of the building and lower average wind speeds in a city environment reduce the annual energy capture.
- What happens if I produce more electricity with my wind turbine than I can use?
- Excess energy on windier days can be automatically fed back into the National Grid and if you're signed up to the Feed-In Tariff scheme you will receive an extra payment for this electricity in the form of the Export Tariff . Alternatively, your surplus electricity can be stored in a battery bank and called upon as a back up in times of low supply.
- Are wind turbines noisy?
- Most modern models have been designed to be very quiet indeed - of course, whether noise levels matter will depend how far the turbine is from habitation. Ideally the turbine should be located at least 100m from your closest neighbours. Your planning authority will also have a view on acceptable noise levels - visit http://www.planningportal.gov.uk/ for more information.
- Will a wind turbine have an impact on local TV and radio reception?
- The materials used to make the turbines are unlikely to 'chop up' a signal and create electromagnetic interference (EMI).
- How much do wind turbines cost?
- A typical 1kW roof-mounted wind turbine will cost around £2,000, with larger 2.5kW and 6kW freestanding (pole-mounted) systems costing around £15,000 and £22,500 respectively.
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