Solar installation – Brandenburg

Legal basis

• EEG 2023 – feed-in tariff and funding (federal level)
• Solarspitzengesetz – mandatory smart meter and control unit for new installations from 7 kWp (since 25.02.2025); without a control unit, the grid operator permanently limits feed-in to 60 % of installed capacity
• Brandenburgische Bauordnung – so far, a solar obligation for new public/commercial buildings; currently being repealed (as of 07/2026)

Solar obligation in Brandenburg

No solar obligation applies or has applied to private residential buildings – neither for new construction nor roof refurbishment or property purchase.

For new public and commercial buildings with at least 50 m² roof area, an obligation previously applied: at least half of the roof area had to be covered with PV or solar thermal panels. In May 2026, the red-black state government submitted a new building regulation that removes this obligation for public and commercial buildings. The Landtag was due to adopt the amendment at second reading in June 2026, but the final completion of the procedure had not most recently been conclusively confirmed (as of 07/2026). Private owners were never affected by this rule.

Official obligations

Building permit: not required for roof-mounted systems. Exceptions: listed-building protection, ground-mounted systems.

Grid operators

Find your grid operator: Postcode search at solar.red/netzbetreiber

Processing time: 4–8 Wochen | Statutory deadline up to 30 kWp: 4 W weeks (EEG 2024)

Funding in Brandenburg

No direct state grant for private, standalone PV systems. However, private individuals can obtain a low-interest ILB promotional loan, which also covers PV as part of a modernisation.

Tip: Apply via energieportal-brandenburg.de or directly through ILB – always submit the application before work begins. Also enquire directly about municipal programmes in Potsdam and other cities.

EEG feed-in tariff (Q2/Q3 2026)

Valid: 01.02.2026 – 31.07.2026 | From 01.08.2026, a reduction of 1 % (six-monthly reduction under § 49 EEG 2023). Systems already commissioned retain their tariff rate for 20 Jahre.

Installation steps in Brandenburg

1. Check the roof (orientation, structural integrity) – private residential buildings are not subject to the solar requirement
2. Check the ILB promotional loan if PV is part of a larger modernisation; otherwise KfW 270
3. Engage a certified specialist company
4. Register with the grid operator (E.DIS or Stadtwerke) – allow 4–8 W weeks
5. Register in MaStR, have a smart meter installed
6. Commissioning + acceptance report

Note on grid operators: The table above shows common grid operators – it is not exhaustive. The grid operator actually responsible depends solely on the postcode . Find it using the postcode search: solar.red/netzbetreiber

How to submit applications

1. Feed-in application to the grid operator

1. Find the grid operator: Postcode search at solar.red/netzbetreiber
2. Online portal of the grid operator (legally required since Jan. 2025)
3. Complete the form: Location, planned capacity in kWp, feed-in type
4. Wait for approval – 4 W-week deadline (up to 30 kWp); automatically approved if there is no response after 1 month
5. Tip: The installer often handles registration – ask when requesting a quote

2. MaStR registration (Marktstammdatenregister)

1. Portal: marktstammdatenregister.de
2. Deadline: within 1 month of commissioning
3. Required: System capacity (kWp), installation date, site postcode
4. Tip: Many installers complete the MaStR registration too – clarify this in the quote

3. ILB promotional loan (Brandenburg)

1. Portal: ilb.de or energieportal-brandenburg.de
2. Submit the application before work begins
3. Relevant if PV is part of a larger modernisation measure for the home

4. KfW 270 (federal level – the only standalone funding in Brandenburg)

1. Apply via your bank (not directly through KfW)
2. Portal: kfw.de/270
3. Submit the application before placing the order