Overview
- Industry data indicate roughly 500,000 new balkonkraftwerke in 2025, lifting the registered total past about 1.2 million by year’s end.
- By December 12, 413,400 new devices had been entered in the federal registry, with officials and the industry noting delayed or omitted registrations.
- The newly installed generation capacity from these systems rose about 26 percent in 2025 as buyers opted for higher‑power module packs.
- North Rhine–Westphalia logged about 82,600 new registrations by December 19, bringing around 239,000 systems into operation in the state.
- Owners must register in the Marktstammdatenregister, keep within the 800‑watt inverter and roughly 2,000‑Wp module limits, notify grid operators when adding storage, and can use batteries for night self‑consumption with features such as EPS emergency outlets.