How a balcony solar system works
A balcony solar system (plug-in solar system) generates solar power in a small space and feeds it directly into your home. You use the electricity yourself first: appliances that are currently running are supplied with solar power proportionally. Only what you do not consume flows into the public grid.
Simply explained: What is a balcony solar system?
A balcony solar system is a small photovoltaic system that typically consists of one to two solar panels, an inverter, and a connection cable. The goal is to increase your self-consumption without installing a large rooftop system.
How the electricity flows (function in the household)
The solar panels generate direct current. The inverter converts it into household-standard alternating current (230 V). Via the plug connection, the electricity is fed into your electrical circuit and is immediately available for your devices. The more base load you have during the day (e.g., router, refrigerator, standby, home office), the higher the proportion that you use directly yourself.
These components you need
- Solar panel(s): generate electricity from sunlight.
- Inverter: converts direct current into alternating current and limits the feed-in power.
- Connection cable: connects the inverter and the feed-in point.
- Feed-in point: depending on the setup, e.g., Schuko or Wieland.
What determines the yield (orientation, tilt, shading)
How much electricity your balcony solar system provides depends primarily on orientation, tilt angle, and shading. An orientation as free as possible towards the sun and little shade improve the yield significantly. If your balcony is permanently heavily shaded, the benefit is usually lower.
Installation and connection: What you should pay attention to
The modules must be securely fastened (e.g., to the balcony, to the facade, or on a suitable frame). When connecting, it is important that the plug connection and electrical installation are suitable for the intended use. If you want to go through the setup step by step, you will find details in the installation instructions for balcony solar systems.
Registration and framework conditions: What is involved in practice
Even though balcony solar systems are comparatively uncomplicated, registration and reporting are involved in practice. Standard is reporting to the grid operator as well as registration in the market master data register. In rental situations, additional requirements from the rental agreement or house rules may be relevant, especially with visible installation or interventions in the building fabric.
Economic efficiency: When is it worth it?
A balcony solar system is particularly worth it when you regularly consume electricity during the day and use the generated solar power directly yourself. Without storage, you cannot "save" electricity for later – simultaneous use is the most important lever. For a quick assessment, you can check your situation with the balcony solar system calculator.
Next step: Select a suitable balcony solar system
If you want to go directly into the selection after understanding, you will find suitable balcony solar systems here as the next commercial step:
View and select balcony solar systems
Further orientation in the balcony solar system cluster
If you first want to get an overview of subtopics, variants, and next steps, use the topic world as a central orientation in the cluster:
To the balcony solar systems topic world
FAQ on the function of a balcony solar system
Does a balcony solar system supply my entire apartment?
No. It reduces your grid consumption by covering a part of your current consumption. How large the effect is depends on the power, location, and your consumption profile.
What happens to excess electricity?
Electricity that you do not consume at the moment of generation usually flows into the public grid.
Do I need storage?
Not necessarily. Without storage, direct use during the day is the most important factor for economic efficiency. Storage can help, but it is a separate decision with additional costs and requirements.
Is installation also possible without an electrician?
The installation is often well manageable, nevertheless, the connection and electrical installation should be carried out safely and appropriately. If you are unsure, a professional inspection is advisable.
