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Register market players in the register

If you are a market player in the electricity or gas market, you must register in the Market Master Data Register (MaStR) of the Federal Network Agency .

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  • Marktstammdatenregister
    The Market Master Data Register is the register for the German electricity and gas market. It is abbreviated MaStR. The market master data register is primarily used to register the master data for electricity and gas generation plants. In addition, the master data of market players such as plant operators, network operators and energy suppliers must be registered.
  • Internetportal des Marktstammdatenregisters
    In the Market Master Data Register (MaStR) you can mainly register master data for the electricity and gas market.

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Bundesnetzagentur für Elektrizität, Gas, Telekommunikation, Post und Eisenbahnen
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Procedure details

As the central register for the energy transition, the Market Master Data Register (MaStR) records data on all relevant market players in the electricity and gas energy market and, in a second step, all generation facilities:

  • All new plants and all existing plants,
  • Plants for the generation of renewable and conventional energy,
  • plants for the generation of electricity and gas.

If you operate an electricity or gas generation system (e.g. photovoltaic system, wind energy system, combined heat and power plant, battery storage system, biomethane system), you must register it in the MaStR. You are also obliged to register if no subsidy is granted or claimed for the electricity from the system.

All running systems must be registered regardless of when they were commissioned - even if your system has been running for many years. This means that even if you have already registered your system at various other locations, for example with your grid operator or in previous registers of the Federal Network Agency, you must register these systems once again in the MaStR.

As a citizen (natural person), you can also register using forms in exceptional cases on request.

Authorities can access the data in the MaStR. This allows them to either significantly simplify their own surveys or dispense with them altogether. Installation operators and other market players can refer to the data they have entered in the MaStR.

  • Required Documents

    No special documents are required for registration as a market player. For the registration of the units in the second step, the documents are listed separately.

If you would like to register yourself as an operator and your electricity and gas generation facilities in the Market Master Data Register (MaStR), you can do so via the MaStR internet portal:

  • Access the MaStR internet portal and first register as a user with a valid e-mail address.
  • Log in to the MaStR internet portal and register as a system operator.
  • Then register your unit in the second step.
  • Once you have successfully registered, the system will provide you with your registration certificate with your registration numbers (MaStR numbers).
  • You can make changes and corrections online at any time.

A deadline of 1 month applies for the notification of market players.

1 bis 14 Tage

  • Registering electricity and gas units in the register

    If you operate an electricity or gas installation and it is connected to an electricity or gas grid, you must register the unit in the Market Master Data Register (MaStR) of the Federal Network Agency. You only have to register plants in planning in certain cases.

Status: 21.10.2025
Editorially responsible for prodecure description: Bundesministerium für Wirtschaft und Energie
Source: Federal Portal