Balcony power plant for apartments and rental apartments – is that possible

---

The energy transition is no longer confined to large rooftops; it's now happening on the smallest balconies. More and more tenants are discovering balcony power plants – also known as mini solar systems – to generate their own electricity and save costs. But is operation even permitted in a rented apartment? What rules apply, is the purchase worthwhile, and what should you consider during installation? This article answers the most important questions and provides a comprehensive guide.

---

How exactly does a balcony power plant work?

A balcony power plant, often referred to as a plug-in solar device or mini PV system, is a compact photovoltaic system. It typically consists of one or two solar modules, an inverter, and a connection cable for a conventional socket.

The operating principle is remarkably simple:

1. Power generation: The solar modules capture sunlight and convert it into direct current.

2. Conversion: The inverter converts the direct current into household alternating current (230 volts).

3. Feed-in: The electricity is fed directly into the apartment's power grid via a socket.

The solar power generated in this way is immediately consumed by the active devices in the household, such as the refrigerator, WLAN router, or television. This reduces the amount of electricity drawn from the public grid, which directly lowers the electricity bill. Since 2024, registration has been significantly simplified by Solar Package I, and the permitted feed-in capacity has been increased to 800 watts.

---

What are the advantages of a balcony power plant for tenants and landlords?

A mini solar system on the balcony offers attractive benefits for both tenants and landlords.

Advantages for Tenants	Advantages for Landlords
Cost Savings: Reduces the annual electricity bill by several hundred euros.	Increased Attractiveness: Enhances the property with sustainable features.
Independence: Provides a degree of independence from rising electricity prices.	Modern Image: Positions the property as environmentally conscious and future-oriented.
Climate Protection: Reduces personal carbon footprint through clean energy.	Legal Certainty: Clear regulations (through Solar Package I) simplify handling inquiries.
Easy Handling: Easy to install and simple to take with you when moving.	No Costs: The investment is fully borne by the tenant.

---

What legal aspects must tenants consider?

The legal hurdles for balcony power plants have been significantly lowered. Since the introduction of Solar Package I, balcony power plants are considered a "privileged measure." This means landlords can no longer simply prohibit their installation across the board.

Important legal aspects:

• Landlord's Consent: You must inform your landlord about the planned installation. A prohibition is only possible in well-founded exceptional cases (e.g., in the case of listed facades or if the installation is improper).

• Homeowners' Association (WEG): Even in a homeowners' association, consent can no longer be easily denied. The installation is considered a privileged measure that generally must be approved.

• Visual Impact: The system should not significantly impair the building's external appearance.

Registration is Mandatory:
Even if installation has become simpler, you must register your balcony power plant:

1. Market Master Data Register: Simple and quick online registration with the Federal Network Agency is required.

2. Grid Operator: Registration with the grid operator has been greatly simplified. Often, registration in the Market Master Data Register is sufficient, as the grid operator is automatically informed. Separate registration is often no longer necessary.

---

What should I consider before installation?

Good planning is crucial for the success of your balcony power plant. Consider the following points to maximize yield and ensure safety.

Aspect	Recommendation
Location & Orientation	A south-facing balcony is ideal, but east or west-facing balconies are also profitable. Ensure as little shade as possible from trees or neighboring buildings.
Secure Fastening	Use certified mounts that are suitable for your balcony railing, facade, or floor. The installation must be storm-proof!
Connection & Socket	A special Wieland feed-in socket offers the highest safety. However, connection to a normal Schuko socket is also permitted for systems up to 800 watts.
Component Quality	Pay attention to high-quality, durable solar modules and a certified inverter. This ensures high yields in the long term and compliance with grid safety standards.

---

Is there government funding for balcony power plants?

Yes, many cities, municipalities, and federal states offer financial grants for the purchase of balcony power plants. These subsidies are intended to make the transition to renewable energy more attractive for citizens.

Typical funding:

• Flat-rate grants, often between 100 and 500 euros per system.

• Sometimes there are additional bonuses for low-income households.

Since programs are often quickly exhausted and vary greatly by region, you should inquire directly with your city or municipality. A quick online search for "balcony power plant funding [Your City]" usually provides the relevant results.

---

FAQ – Frequently Asked Questions

Can my landlord prohibit the balcony power plant?
No, a blanket ban is no longer possible since Solar Package I. Only well-founded exceptions (e.g., monument protection) are permissible. However, you must inform them.

How much electricity can I really save?
Depending on the orientation and output (typically 600-800 watts), you can generate 400 to 800 kWh of electricity annually and thus reduce your electricity bill by 150 to 300 euros.

Do I need an electrician for the installation?
Not necessarily. Modern balcony power plants are designed for self-installation. However, if you have any uncertainties regarding the electrical work or assembly, it is advisable to hire a professional.

What happens to the system if I move?
No problem. Balcony power plants are mobile. You can simply dismantle the system and reinstall it in your new apartment.

---

Conclusion: Is a balcony power plant worthwhile in a rented apartment?

Yes, absolutely. A balcony power plant is one of the simplest and most effective ways for tenants to actively participate in the energy transition while simultaneously reducing their electricity costs. The legal hurdles are low, installation is straightforward, and the investment often pays for itself within just a few years.

Those who inform themselves well beforehand, pay attention to quality and secure installation, make a smart decision with a balcony power plant – for their own wallet and for the climate.