Can I plug in a balcony solar system?
Yes. Plug-in solar devices ("balcony power plants") are expressly allowed and, since Solar Package I (May 2024), much simpler. The inverter output may be up to 800 watts (module power up to 2,000 Wp). You only need to register the device in the market master data register (MaStR) of the Federal Network Agency (online, a few minutes) — the separate grid-operator registration is gone. Thanks to the 2024 reform of § 554 BGB and the WEG law, tenants and owners have a claim to install one; the landlord/association may refuse only in justified exceptional cases (e.g. risk to the building or fire safety).
📋 The rules
- 800 W inverter output allowed (modules up to 2,000 Wp)
- Registration only in the market master data register (MaStR) — no grid-operator filing
- Tenants/owners have a claim to consent (§ 554 BGB / WEG)
- Refusal only in justified exceptional cases (structure, fire safety, rules)
- Transitionally, backward-running meters are tolerated until the meter is swapped
🔓 Exceptions
- For listed façades or a concrete fire-safety risk, consent can be refused
- The landlord may have a say on the type of mounting/appearance
- Larger systems (beyond plug-in limits) follow the normal PV rules
⚠️ Penalties & fines
Usually no fines. Missing the MaStR registration is technically an offence, but in practice the focus is on registering afterwards. If you mount the device structurally without consent, the landlord can demand removal. More important is safety: faulty installation can have insurance and liability consequences — when in doubt, use a professional.
📎 Official sources
- Federal Network Agency · Plug-in solar (balcony power plant) →
- § 554 BGB · Structural changes (e-mobility, solar) →
- Verbraucherzentrale · Registering and rules for balcony solar →
❓ Frequently asked
Can I just plug in a balcony solar system?
Yes. Plug-in solar is allowed. Since Solar Package I (2024) an 800 W inverter is permitted, and registration runs only through the market master data register. Tenants even have a claim to install one.
Do I have to register it?
Yes, but only once in the Federal Network Agency's market master data register — a few minutes online. The previously required grid-operator registration has been dropped.
Can the landlord ban a balcony power plant?
Only in justified exceptional cases, e.g. if the building structure or fire safety is at risk. Since the 2024 reform of § 554 BGB, tenants have a claim to install one; the landlord may have a say on the mounting.
How many watts are allowed?
The inverter may be up to 800 watts, with installed module power up to 2,000 Wp. That's considerably more than the former 600 watt limit, since 2024.
Do I need a new electricity meter?
Not immediately. Backward-running meters are tolerated for a transition period until the grid operator swaps in a modern (two-way) meter. You may run the system in the meantime.
🔎 Common searches
What people search to land here:
- “register balcony solar 2026”
- “balcony solar 800 watt allowed”
- “balcony solar landlord consent”
- “balcony solar market data register”
- “plug-in solar tenant right”
- “balcony power plant rules”