Balcony power plant: Is landlord's permission required?

More and more people in Germany want to actively shape the energy transition – and they want to do it without owning a roof. A balcony power plant (also known as a plug-in solar device) is the perfect way for tenants to generate their own green electricity and significantly reduce their electricity bill.

However, the legal situation often caused uncertainty in the past: Can the landlord prohibit the installation? Do I absolutely need their permission? And what is the best way to proceed to avoid conflicts?

Thanks to pioneering legislative changes, the situation for tenants has drastically improved. In this guide, you will find out everything about the current legal situation, how to easily ask your landlord for permission (including a free template), and how much money you can actually save with a mini solar system.

1. The new legal situation: What does "privileged measure" mean?

For a long time, tenants were in a legal gray area. Landlords could often block the installation of a balcony power plant with general arguments such as "It spoils the appearance of the house" or "We don't want that here."

Those times are over. The legislator has reacted and officially classified plug-in solar devices as so-called privileged measures. This was enshrined through amendments in the German Civil Code (§ 554 BGB) for tenants and in the Condominium Act (§ 20 para. 2 WEG).

What the privileging means for you in concrete terms:

• Legal right to approval: As a tenant, you generally have a legal right to have your landlord approve the installation.

• No more blanket prohibition possible: The landlord or the community of owners (WEG) may no longer prohibit the balcony power plant without good reason or purely for aesthetic preferences.

• No bureaucracy with the grid operator: Thanks to the "Solar Package I" also passed, registration with the local grid operator has been completely eliminated. You only need to register the system in the Market Master Data Register of the Federal Network Agency – a process that takes only a few minutes online.

2. Can the landlord still prohibit the balcony power plant?

Even if you have a legal right: The new legal situation is not a free pass for a wild self-assembly. Lawyers strictly differentiate between the "whether" and the "how".

While the "whether" (i.e., the fact that you are allowed to generate solar power at all) is privileged, the landlord can still have a say in the "how" (the specific implementation).

Important BGH ruling: The Federal Court of Justice (BGH) has clarified that unauthorized installation without prior agreement or decision by the community of owners is still illegal. Anyone who simply installs without informing risks an order to dismantle – even if the landlord should have actually granted permission.

In these exceptional cases, the landlord may refuse consent or impose conditions:

1. Monument protection and preservation statutes: If the building is listed or in a special renovation area, official regulations may prevent installation on the facade.

2. Safety risks & structural integrity: If the structural integrity of the balcony is at risk or the mounting system cannot withstand wind loads, the landlord may intervene. They can demand that only certified brackets be used.

3. Damage to the building structure: If you want to drill holes through the outer wall or window frame for cable routing, this is a significant intervention in the building structure. The landlord can demand that you use flat window feed-throughs instead to protect the building structure.

4. Uniform appearance: The landlord can set design requirements – for example, that all tenants in the house may only use uniformly black panels (Full Black) to maintain the overall appearance of the facade. Exaggerated or harassing requirements (such as prescribing an extremely expensive luxury brand) are, however, impermissible.

3. Step-by-step to approval: How to convince your landlord

To avoid unnecessary trouble from the outset, you should approach the matter in a partnership-like manner. If you immediately show the landlord that you have thought about safety, aesthetics, and dismantling, objections usually vanish.

It is best to proceed according to this scheme:

Template: Request for installing a balcony power plant

Copy this text, adapt the data in brackets, and send the letter by email or post to your landlord or property management.

Dear Ms./Mr. [Name of landlord/contact person],

I am a tenant in your property at [Street, House Number, Apartment Number]. As part of the energy transition and to reduce my personal electricity costs, I am planning to install a plug-and-play balcony power plant (plug-in solar device).

Since the legal changes in tenancy law (§ 554 BGB), tenants have a fundamental right to have such systems approved. To ensure a harmonious and safe coexistence, I would like to inform you in advance about my plans and obtain your consent.

Here are the key details regarding the planned installation:
- Inverter output: Maximum 800 watts (corresponds to the legal limit).
- Mounting location: [e.g., outside on the balcony railing / placed on the balcony floor].
- Fastening: A certified, storm-proof mounting system will be used. No permanent damage will be caused to the building structure (e.g., no drilling into the exterior facade).
- Cable routing: Power is fed in via [e.g., a flat window feed-through to the inside / an existing outdoor socket].
- Safety: The device complies with all common VDE safety standards. My private liability insurance covers any damage that may arise in connection with the system.

I undertake, of course, to professionally dismantle the system upon moving out and to restore the balcony to its original condition.

Attached are the product data sheets and a photo of the planned mounting location. 

I would be very grateful for a prompt written confirmation of my plans. Should you have any questions or specific requirements regarding the aesthetic design, I am available at any time for a brief discussion.

Sincerely,

[Your first and last name]
[Your phone number / email address]

4. Is the effort worthwhile? Costs and savings at a glance

A balcony power plant is not only good for your conscience but, above all, for your wallet. As acquisition costs have massively decreased in recent years, the systems pay for themselves faster than ever before.

Calculation example for a standard balcony power plant (800 watts):

Savings Tip: If you strategically schedule high-consumption appliances like washing machines, dishwashers, or battery charging for midday hours, you will increase your self-consumption rate and maximize savings without having to spend money on expensive battery storage.

Conclusion: No need to fear your landlord

Thanks to the new tenancy law, the path to your own balcony power plant is clearer than ever before. Landlords can no longer generally forbid you from having a mini solar system. Nevertheless, follow the correct procedure: Talk to them, use our written template, and secure their consent before mounting the modules. This way, nothing stands in the way of worry-free savings with the power of the sun.

FAQ – Frequently Asked Questions

1. Can I simply install the balcony power plant without permission?

No. Even if you have a legal right to approval, you must inform your landlord in advance and obtain their consent. Unauthorized installation on the balcony railing or facade is considered a structural alteration and can, in the worst case, lead to a warning or the obligation to immediately dismantle it.

2. What can I do if the landlord simply doesn't respond?

If the landlord does not respond to your written request for weeks, you should politely remind them again and point out the legal deadline and the legal entitlement under § 554 BGB (German Civil Code). Should they persistently refuse, in extreme cases, the only recourse is through tenant counseling or a so-called resolution replacement action (or consent action). However, usually, a reference to the current legal situation is enough to prompt the property management to cooperate.

3. Do I need to have a special Wieland socket installed?

No, in most cases, a standard Schuko socket (household socket) is perfectly sufficient. The Solarpaket I (Solar Package I) clarified that operation with a Schuko plug is technically safe and legally permissible, provided the inverter has the prescribed NA protection (which stops current flow in milliseconds when the plug is pulled out). Landlords are no longer allowed to demand the expensive installation of a Wieland socket without good reason.

4. Who is liable if the balcony power plant falls down in a storm?

For damages to third parties (e.g., parked cars or passers-by), the operator of the system – meaning you as the tenant – is generally liable. For this reason, many landlords rightly demand proof of private liability insurance before granting permission. Check in advance whether your insurance policy includes "tenant solar systems" or "balcony power plants" without additional charge. Most modern policies now do.

5. Can the landlord demand that an electrician connect the system?

No electrician is required for merely plugging the Schuko plug into the socket – that's precisely the point of a plug-in solar device. However, the landlord may demand that the mechanical fastening to the balcony is absolutely professional and storm-proof. Anyone who is not skilled in DIY should seek help with this.

6. What happens to the balcony power plant when I move out?

Since the balcony power plant is your personal property, you simply take it with you when you move. You are obliged to restore the balcony to its original condition when you move out. This means that all mountings must be removed without leaving any residue. If you drilled holes with the landlord's permission, they must be properly filled.

7. Can the homeowners' association (WEG) forbid the landlord from giving permission?

The homeowners' association has the same obligations towards the renting owner as the latter has towards the tenant. The WEG also may no longer generally forbid the system (§ 20 para. 2 WEG). However, the WEG can establish binding rules for the entire residential complex (e.g., uniform frame colors for the modules or refraining from drilling into insulated facades). Your landlord must then pass these rules on to you.

8. Does the right also apply to balconies facing the street?

Yes, the legal right applies regardless of the balcony's orientation. Even if the balcony faces the street, the landlord may not forbid the system solely due to its visibility. However, they may impose design requirements (e.g., inconspicuous all-black modules) to maintain the harmonious visual appearance of the house.