Do not operate the form until this page and its programme have loaded completely. Note: Prices and costs are examples only. They may not reflect current market conditions or local site or installation conditions.

Investment with years expected lifetime

600 kW example 225 kW example 1.5 MW offshore Clear All Data Other wind turbine price

20 % 25 % 30 % 35 % 40 % Other installation costs

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Total investment *

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Current Income and Expenditure per Year

Income kWh @ per kWh =

Use % of turbine price for operation & maintenance
Use per kWh (in present day prices)
Specify total cost (in present day prices) to the right

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Total Net Income per Year *

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Net Present Value @ % p.a. real interest rate *

Real Rate of Return *** *

Electricity Cost per kWh** Present value per kWh *

Payments, (Used for Net Present Value and Real Rate of Return) **
00 Investment (expenditure, therefore always a minus sign)
01 02 03 04 05
06 07 08 09 10
11 12 13 14 15
16 17 18 19 20
21 22 23 24 25
26 27 28 29 30
31 32 33 34 35
36 37 38 39 40
41 42 43 44 45
46 47 48 49 50
* = Boxes marked with an asterisk cannot be changed directly by the user.
** = These boxes is filled out by the programme, but you may change the amounts if you wish. The calculation of electricity cost per kWh uses the same payments as above, but the programme subtracts the electricity sales income from all non zero payment values in the table, year 01 to year 50. If you want to be sure what you are doing when computing the electricity cost per kWh, you should set the income from electricity sales to zero.
*** = To compute the real rate of return you must have entered both expenditures and income from electricity sales.
You may experiment by changing the figures in the example below. You can fill in any box, except the result boxes marked with an asterisk (*). After changing data, use the tab key, click the Calculate button, or click anywhere on the page outside the field you have updated to see the results. Click on the question marks for help.