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How much wind energy income would a farm wind turbine provide?

The amount of wind energy income available is slightly complicated. There are up to four components that make up the total value of electricity generated, namely:

  • Feed-in Tariff (also known as the FiT or Clean Energy Cashback)
  • Export value
  • Offset value for energy used on-site

Each of these components is described in more detail here along with information on how they can affect the overall value of the energy generated.

If you want a simple answer to determine wind energy income, then assuming 100% of the generated energy was exported with an export rate of 5 p/kWh, then the value of the electricity generated, per kWh, for the wind turbine sizes shown below would be:

Max. Power Output Feed-in Tariff Export Price Total Value
<50 kW 8.33 p/kWh 5 p/kWh 13.33 p/kWh
50 to 100 kW 6.08 p/kWh 5 p/kWh 11.08 p/kWh
100 kW to 1.5 MW 3.92 p/kWh 5 p/kWh 8.92 p/kWh
1.5 MW to 5 MW 0.83 p/kWh 5 p/kWh 5.83 p/kWh

Note that this is based on the FiT rates as of the last page update on 11th november 2016.

For wind turbine sites with an annual average wind speed ranging from 5 to 9 m/s, and all energy is exported to the grid, the resulting wind turbine income is shown below.

Max. Power Output Example Turbine Annual Gross Income for the following Annual Average Wind speeds:
5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0
50 kW Northern Power NP50 £16k £19k £22k £24k £26k £28k n/a n/a n/a
100 kW Norvento nED-100 £13k £18k £23k £27k £31k £35k n/a n/a n/a
225 kW Endurance X-35 £22k £28k £35k £41k £46k £52k n/a n/a n/a
900 kW EWT DW61 £89k £112k £135k £157k £179k £199k n/a n/a n/a
1.5 MW ENO 82 £177k £220k £264k £308k £349k £388k £423k £465k n/a
3 MW Enercon E82 £127k £163k £202k £243k £285k £328k £367k £405k £442k

If you can use energy onsite the inccome greatly increased. As an example, For wind turbine sites with an annual average wind speed ranging from 5 to 9 m/s, and all energy is used onsite, the resulting wind turbine income is shown below.

Max. Power Output Example Turbine Annual Gross Income for the following Annual Average Wind speeds:
5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0
50 kW Northern Power NP50 £19k £22k £25k £28k £30k £31k n/a n/a n/a
100 kW Norvento nED-100 £20k £27k £33k £39k £45k £50k n/a n/a n/a
225 kW Endurance X-35 £40k £51k £62k £73k £84k £93k n/a n/a n/a
900 kW EWT DW61 £166k £208k £250k £292k £332k £370k n/a n/a n/a
1.5 MW ENO 82 £311k £388k £465k £541k £614k £682k £745k £803k n/a
3 MW Enercon E82 £363k £468k £580k £697k £816k £934k £1050k £1161k £1266k

To see how this translates into a return on investment you need to consider what the project will cost and what wind turbines cost to operate, then the return on investment can be calculated. Obviously the big unknown is whether you will successfully obtain planning consent, and there is always a risk that you won’t after spending a substantial sum on the planning application. This is why a good quality wind feasibility study is required, which although it won’t remove the risk of an unsuccessful planning application entirely it will analyse the myriad issues in a structured way and enable you to make a well-informed decision on whether to commit to a planning application.

Back to Windpower Learning Centre

Want to install a wind turbine?

If you are in the UK then take our Wind Site Self-Assessment - Step 1 of our modular Windpower Feasibility Study. It takes about 20 minutes to work through the basic checks to see if your site might be suitable, including:

  • Estimating wind speed
  • Checking proximity of nearby properties
  • Checking site access and approach roads
  • Investigating connection with the grid

If you are in the Republic of Ireland, or overseas, the first step is to consider our modular Windpower Feasibility Study, so please Contact us to discuss your site further.

Start the process here: Take the Wind Site Self-Assessment