Net Worth Calculator: Determine The Value of Your PV System With our Free Online Tool

Net Worth Calculator: Determine The Value of Your PV System With our Free Online Tool

What is my PV-System actually worth? Get a quick answer to this question by using our online Net Worth Calculator, the most popular price indication tool on the market, which calculates a reference value for your photovoltaic system in just three easy steps.

This value indication makes you well prepared for sales negotiations.

The Net Worth Calculator determines the value of your photovoltaic system based on the data you enter in an intuitive form. All input fields are explained using so-called tooltips in order to prevent input errors that can lead to incorrect results.

Once you’ve entered the required data correctly, you will receive an overview of indicative values for your photovoltaic system where different return expectations have been taken into account. This range of results shows you which selling price you can expect based on return expectations of the investors.

Step 1: Load the Net Worth Calculator

You can access the Net Worth Calculator either via the link or via our navigation bar on under “Marketplace” and then “Net Worth Calculator”. Here you will find important information on how to use the calculator.

It is important to note that our Net Worth Calculator provides you with an initial and extremely accurate point of reference for determining your sales value. To be on the safe side, you should check the values in detail in a technical due diligence, financial due diligence or legal due diligence. As a seller you can thus make your offer even more attractive for investors.

Via the button “Calculate value”, you can:

screenshot of the homepage of Milk the Sun's Net Worth Calculator



Step 2: Enter all relevant data for the calculation

If you are already registered on the and are currently logged in, you can enter the relevant data immediately.

If you are not yet registered, you will first be asked to enter your contact details, such as your name and email address.

The intuitive form then guides you step by step through the input process.

type in your contact information

Enter general information about the PV-System

In the first section you will be asked for general information about your photovoltaic system, such as project size in kWp, date of grid connection, specific yield, degradation of the modules in percent, initial investment or acquisition costs, depreciation period in years, planned date of sale and the country in which the system is located.

To simplify matters, we have pre-filled fields with default values, which are marked green and can also be overwritten.

type in your pvsystem information

Enter compensation data

In this section you will be asked to enter the renumeration data for the generated electricity.

A distinction is made here between the EEG remuneration and a remuneration for possible self consumption. The remuneration amounts must be indicated in cents per KWh. The share of self consumption must be stated as a percentage of the total energy produced.

Here too, we have pre-filled the green fields with default values, but these can also be overwritten.

type in the compensation details

Enter operating costs

The ongoing annual operating costs, such as maintenance, insurance and others, should be entered in one sum for simplification. Lease costs should also be entered as an annual sum.

operational expenses

Enter debt financing

If your photovoltaic system is debt financed, you have the option of entering the corresponding data in this section. If not, you can skip this area.

You need the amount of debt financing as a percentage of the total investment sum, the interest rate, the term of the loan and the grace period.

Here the green fields are also pre-filled with assumptions that can be overwritten.

information on debt financing

Other assumptions for the calculation

In the last section, you can enter the inflation rate and a tax rate if you want to overwrite the pre-filled values.

type in the expected inflation and tax percentage


Step 3: Calculate the value of your photovoltaic system.

After you entering all the data and clicking on the “Calculate” button, the system checks whether the all data has been entered in the correct format.

Please note that mandatory fields are marked with a * and will be marked red if they are filled out incorrectly. The correct format of the entry is given in the respective field as an example.

Explanations of the individual fields can be found in the tooltips that you see when you move the mouse over the black “i” next to each field.

If all data has been entered in the correct format, the result of your calculation is displayed in two tables.

On the one hand, you will be shown a reference value for the sale of the asset, taking into account a current normal market return on equity at the specified time of sale. On the other hand, a second table will show you corresponding values with alternative expected returns on equity.

You can easily save the calculated results as PDF.

Of course you also have the possibility to offer your photovoltaic system for sale directly on our marketplace. All you have to do is click on the button “Sell project”.

results of the net worth calculator and current value of the PV system


To the Net Worth Calculator


List and explanation of the required fields:

  • Length of the EEG remuneration: The length of the remuneration guaranteed to you (usually 20 years plus the rest of the year of commissioning)
  • Grid connection: Date at which the PV system is/was connected to the grid
  • Specific yield: The average annual yield in kWh/kWp that the plant has achieved so far
  • Installed capacity: The nominal capacity of the system in kWp
  • New cost of the installation: the net amount for which the installation was originally constructed
  • the amount of the feed-in tariff: The amount of the remuneration in cent/kWh
  • Self consumption: The percentage of produced electricity that you consume or market yourself
  • Remuneration for self consumption: Income that you earn per kWh through own consumption or own marketing
  • Degradation loss p.a.: Decrease in the output of PV modules per year in percent
  • Operating costs p.a.: Average operating costs of the PV system per year
  • Lease p.a.: Annual costs incurred by the use of the lease. For one-time payment, please enter 0 here and add the payment to the sum “New costs of the system”.
  • Depreciation period: How long is the PV system depreciated? With an operating life of 20 years, this is usually also 20 years
  • Expected inflation p.a: Average inflation to be expected per year
  • Tax: Tax rate in percent, which is created for your PV system
  • Percentage of borrowed capital: Percentage of the purchase price that was financed by borrowed capital
  • Interest rate: Interest rate for borrowed capital in percent
  • Duration: Duration of the loan
  • Grace period: fixed grace period for your loan
  • Planned time of sale: Date at which you want to sell your PV system

To the Net Worth Calculator