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Micro grids

We support the goals set by the state of Berlin in terms of smart city and climate neutrality. Micro grids are a building block for achieving these goals.

What are micro grids?

Electricity is generated locally from renewable energies, with a photovoltaic system or combined heat and power generation with a CHP plant, for example, and made available directly to customers at the place of generation.

A prerequisite for micro grids is that the customers are connected to a dedicated generation system and can use the generated electricity. The micro grids must also be separated from the general supply grid with a totalizer.

How do micro grids work?

From plant operator to electricity producer and supplier

If customers wish to use the electricity offered by the micro grid provider, this must be agreed directly with the micro grid provider.

The supply of electricity must also take place if no electricity is produced by the dedicated generating system. The additional electricity required for this is obtained from an electricity supplier by the micro grid provider and taken from our distribution network via the grid connection. The micro grid provider is therefore the electricity producer, electricity buyer and electricity supplier to the micro grid users at the same time.

If more electricity is produced at times than is consumed by the micro grid users, the micro grid provider feeds this electricity into our distribution grid and can receive payment for this.


Tenants who do not wish to participate in the micro grid can continue to purchase their own electricity from an electricity supplier of their choice. The electricity passed through to this tenant is deducted at the totalizer, so that the micro grid provider only draws for the additional electricity required by the micro grid users. The electricity quantity required for this is calculated either by the distribution system operator or a metering point operator.

To ensure that your system is fit for the micro grid, please first have it checked by a registered installers. Once the check has been completed, the installer contacts us, agrees the technical conversion of the micro grid system with us.

Under what conditions do we implement micro grids?

Criteria are laid down in the Energy Industry Act for a micro grid system and must be met. If the relevant criteria cannot be met, a system is an energy supply network.

Questions and answers

In the following, we have compiled frequently asked questions and the corresponding answers for your information. Feel free to contact us if you have any further questions about micro grids. Please use our e-mail address for this.

Does micro grids have a legal basis?

Yes. Micro grids is a colloquial term.

The basis for micro grids are the regulations in accordance with Section 3 No. 24a of the Energy Industry Act (Energiewirtschaftsgesetz - EnWG) for a customer system, energy system for the delivery of energy.

Does Stromnetz Berlin provide the meters for micro grid users and what do the meters cost?

The electricity meters can be provide by Stromnetz Berlin.

The fee for the electricity meter can be found in our price sheet on the ‘Responsible meter operator’ page.

I have a CHP and a PV system. Is a micro grid also possible with this combination?

It is possible to combine several generating systems. Please note that your electrician will coordinate the metering concept with us before building of the micro grid system.

How will the switch from the previous electricity supplier to the micro grid provider be implemented?

The change takes place on the basis of the business processes for supplying customers with electricity (GPKE). As part of the application for the micro grid system, we coordinate the necessary requirements with the micro grid provider.

Do all tenants have to use the micro grid?

No. Tenants are under no obligation to use it. Tenants who do not use it choose their own energy supplier.

Where can I get the additional electricity if I can’t generate enough electricity for the micro grid users with my generating system?

The electricity supplier makes this electricity available via the totalizer.

Can I also supply neighbouring buildings with micro grid electricity?

In principle, several buildings can be combined into one district with one micro grid supply.

Please note that different maximum limits (e.g. number of tenants, spatial extent, connected buildings, transmitted energy) must be observed for a district implementation. The relevant criteria can be found in the overview provided above.

How much does the conversion to a micro grid cost me?

Please clarify the necessary costs for the conversion with your chosen electrician.

Can Stromnetz Berlin also handle electricity billing for micro grid users?

No. We do not offer this service.

What is a micro grid subsidy?

The micro grid subsidy is a special subsidy under the Renewable Energy Sources Act (EEG) for electricity from solar power systems. You can find out more on the website of the Federal Network Agency Federal Network Agency (Bundesnetzagentur).

Connection for generating plants and storages