Overview
- Industry estimates point to roughly 500,000 newly installed plug-in solar systems in 2025, lifting the registered fleet to more than 1.2 million by year-end.
- Official registry data show about 413,400 new devices recorded by December 12, with the sector noting further year-end filings and some systems that are never registered.
- New installations packed more power, as the newly added capacity rose around 26 percent because average devices are larger and more capable.
- North Rhine-Westphalia reported nearly 82,600 new registrations through December 19 and about 239,000 systems in operation across the state.
- Vendors are pushing integrated batteries that enable nighttime use and emergency outlets, while discounted XXL kits up to 4,000 watts must be treated as regular PV systems requiring different installation and registration.