Overview

• Nearly 976,000 balcony photovoltaic systems have been registered in Germany, and the Bundesverband Solarwirtschaft projects the one million milestone will be reached by June 2025.
• The combined recorded capacity of roughly 909 megawatts is comparable to a typical nuclear power plant, with potential unregistered devices pushing actual output toward 2.5 gigawatts.
• A legislative change in October 2024 grants tenants a legal right to install these plug-and-play systems, limiting landlords’ ability to refuse permission absent valid structural or aesthetic concerns.
• Simplified registration in the Bundesnetzagentur’s Marktstammdatenregister and relaxed technical requirements have lowered installation barriers but have also highlighted uneven product quality.
• Stiftung Warentest’s recent safety evaluations found only two models met quality standards, citing inadequate mounting hardware as a common hazard.