Overview
- Owners remain limited to 800 watts AC export for simplified use, yet they may oversize DC modules if the inverter caps output at 800 watts before feeding the household grid.
- Mini‑PV systems must be registered in the German Marktstammdatenregister, with additional notification to the grid operator when adding storage; each inverter is typically registered once even if it serves multiple modules.
- Running multiple units is theoretically possible across a home’s three phases as long as each end circuit complies with VDE rules and the export cap, while linking microinverters via Betteri/AC is described as a gray‑zone workaround with safety caveats.
- Typical annual yield spans roughly 700–1,200 kWh depending on orientation, shading and region, with larger DC arrays paired to 800‑watt inverters reaching about 1,600–2,000 kWh under favorable conditions.
- A featured case with a 1.96 kWp Ost‑West setup plus 3.2 kWh storage produced 1,156.77 kWh in a year and saved €267.87, with estimated payback around 3.5 years without a battery and over eight years with one; market checks note off‑season discounts, including a battery model falling to about €449.