Solar panels in households are becoming a key element of the energy transition. In this context, plug-in solar power plants could significantly accelerate the expansion of solar technologies due to their affordability and ease of installation.
These are small solar panels, with one or two modules, that can be easily connected to a standard household socket and installed on a terrace, roof, garden, or even a facade. Users can utilize the generated energy to power essential household devices such as refrigerators, internet routers, or televisions, while any surplus energy can be fed back into the grid.
Plug-in systems are particularly suitable for people living in apartment buildings who do not have the option to install solar panels on the roof. These systems do not have high DC voltage, making them safer to use.
SolarPower Europe recently published a report analyzing the growth, opportunities, challenges, and regulatory framework for the rapidly expanding plug-in solar system market in Europe. These systems are gaining popularity across the continent, as they allow households to reduce their energy costs and contribute to a sustainable energy transition. In some European markets, plug-in solar systems can cover up to 25 percent of annual electricity needs.
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Germany is leading in this segment, with more than 780,000 registered plug-in solar systems by the end of 2024. Since many systems are still unregistered, estimates suggest that there may be as many as four million in Germany.
The European Union and national governments are increasingly recognizing the potential of these solar systems. For example, Belgium is expected to legalize plug-in systems in April 2025. Germany has taken a step further by simplifying the registration process for plug-in solar systems connected to the grid.
However, there is still a challenge in developing clear regulatory frameworks and standards for these products. To ensure safety, grid compatibility, and consumer confidence, it is essential to establish clear guidelines for the installation and use of plug-in solar systems. The German regulator VDE is already working on developing the first specific standards for plug-in systems, which are expected by the end of 2025.
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