Electrical installation companies

The installation of systems is carried out in accordance with the technical documents that we provide on the installer documents page and in compliance with the requirements of the Low Voltage Connection Ordinance (Niederspannungsanschlussverordnung - NAV).

We carry out random quality checks.

Please use our form customer installation defect notification and send the completed form by email to [email protected].

If you have any technical questions concerning a customer system or meter installation, please contact us.

T 030 49202 5780

Applications for a new grid connection or changes to an existing grid connection can only be made via our customer portal.

If you have any technical questions concerning the grid connection, please contact us.

T 030 49202 4920

Section 13 (2) (4) Low Voltage Connection Ordinance (Niederspannungsanschlussverordnung - NAV) states that work on the electrical system downstream of the grid connection fuse may only be carried out by the grid operator or an installation company that is entered in a grid operator’s installers list.

The principles of cooperation also apply.

To register in the Stromnetz Berlin installers list, please use our online form in the Installer Service Portal to register as a Berlin installation company or for a guest entry if you are based outside Berlin.

You will find all the necessary information on the Installer list page.

You will find all the necessary information on the Installer list page.

You will find details of the qualifications required of a specialist for registration in the  Information sheet on the registration of installation companies on page 15.

You will receive the certificate of competence (TREI licence) after successfully completing the inspection, which you can obtain from the Berlin/Brandenburg State Guild Association for the Electrical Trades.

You will find further information on the website of the
Landesinnungsverbands E-Handwerk Berlin/Brandenburg (the Berlin/Brandenburg State Guild Association for the Electrical Trades).

After successfully registering as an installation company in the Stromnetz Berlin installers register, you will receive an email including digital proof of registration as soon as your registration has been confirmed. This certificate contains a QR code that can be used to check the validity status of the registration at any time.

Following the decision by the state guild committee of 1 April 2024, a registration period of 5 years now applies to Berlin installation companies.

The validity of the registration for guest installers generally corresponds to the validity period of your installer licence issued by your network operator. If this is unlimited, the guest registration is limited to 2 years.

Please send us your request for removal of the entry in writing, stating the reason. The managing director’s confirmation must be enclosed.

If you do not know your network operator’s number, you can enter the name of your network operator in the guest registration form in the Installer Service Portal. The number is automatically obtained from the BDEW database and added to the form.

You are also welcome to find out the number of your network operator (VNB number) yourself from the BDEW website.

For cross-border activities, please refer to the information in the information sheet on the registration of installation companies in section 7.

If your company details change, please let us know immediately via a contact enquiry in the  Installer Service Portal mit.

You will find further information on this in the document Principles of Cooperation in section 3.6. Please enclose the corresponding official proof.

If your responsible specialist leaves your company, please let us know immediately via a contact request in the Installer Service Portal.

The authorisation for electrical work in accordance with Section 13 (2) (4) of the  Low Voltage Connection Ordinance (Niederspannungsanschlussverordnung - NAV) expires with immediate effect until you have registered a new specialist with us. Transitional periods are possible in individual cases.

If any of your contact details change, such as your phone number, please inform us immediately via a contact enquiry in the Installer Service Portal.

For work above 1,000 V, you must obtain and provide proof of a switching authorisation certificate. This is valid for 4 years after completion.

You can request the extension for work above 1,000 V in the online form when you first register in the Installer Service Portal, inklusive des entsprechenden Nachweises veranlassen.

Die Verlängerung der Berechtigung muss von Ihnen selbständig und rechtzeitig über die Kontaktanfrage im Installateur Service Portal including the corresponding proof.

This is a check that is carried out on your meters.

A workshop inspection must be demonstrated independently for the initial registration and an extension of the registration.

For further information, please refer to the guideline for workshop inspections.

A workshop inspection is carried out by the Berlin/Brandenburg Electricians’ Guild (Landesinnungsverband E-Handwerk Berlin/Brandenburg.

You can make an appointment for a workshop inspection with the Berlin/Brandenburg State Guild Association for the Electrical Trades by sending an email to [email protected].

We issue the individual seal number. You must obtain the corresponding sealing pliers yourself from a specialist retailer.

Guest installers use their own sealing pliers.

To do this, send an email to [email protected].

You must report the loss of your sealing pliers to us immediately. Your network operator will provide you with a new seal number.

You can use our customer portal to initiate a variety of processes relating to the grid connection. These include:

• Low-voltage grid connection up to 250 A (installation, modification of an existing connection, dismantling of a connection)
• Site power connection
• Wallbox – registration of charging devices for electric vehicles on your grid connection up to 250 A
• Photovoltaic systems (PV systems) up to 100 kWp

Applications for a grid connection can be submitted by Berlin installation companies or guest installers via the customer portal.

This requires a one-off registration stating the four-digit network operator ID and the last 5 digits of your individual number assigned by the network operator (XXXX-XXXXX).

Address of the meter store

Wilhelm-von-Siemens-Str. 2-10
12277 Berlin

The meter store is open at the following times:

Monday to Friday
7 - 9 am and 1 - 2 pm

For further questions please use: [email protected]

In our low-voltage grid, meters are only set up by installers who have concluded a separate contract with us to do so.

We have published the list of meter installers on the Meter application / installation page. Please make an appointment to have a meter set up directly with one of the companies listed there.

If you remove one of our meters, it must be returned to us within 5 working days.

Returns are made via our meter store.