Your project

From your own roof to the community

Solar power does not have to be used only in your own household. Depending on the situation, several apartments or buildings can benefit from it jointly.

ZEV stands for collective self-consumption, vZEV for virtual collective self-consumption and LEG for local electricity community. They differ in how electricity is shared, measured and billed.

Which situation applies to you?Would you like to use solar power within a building, include neighbouring buildings or share electricity via the public grid? This initial situation helps with the first classification. Whether a model is actually feasible also depends on the participants, the lines, the metering and the applicable requirements.

The three models

How would you like to share solar power?

The overview shows the basic differences. It does not replace an assessment of the technical and legal requirements.

For one building or connected buildings: shared self-consumption via private lines and internal meters.For suitable connection lines: Solar power is recorded with smart meters and billed virtually as a shared total.For local exchange: solar power is shared via the public grid. Participants remain individual grid customers.

For advice, planning and implementation of ZEV, vZEV and LEG models, Solstis and pi-System, two specialist companies within the BKW network, are available to support you. For grid-related requirements such as connection, metering and registration within the BKW grid, you will find the relevant information from BKW Grid.Go to SolstisGo to pi-SystemGo to BKW

Frequently asked questions

What should you clarify before getting started?

In addition to the model, the parties involved, the organisation and billing are also important.

Coordinate your plans together and then check the requirements for your specific situation.

Guarantees of origin document which energy source a quantity of electricity comes from. You can find information about purchase and remuneration at strom.bkw.com.View HKN