800 VA, 960 Wp or 2,000 Wp? The German law and the German standard do not say the same thing

Two numbers, two rules

Since the Solarpaket I reform, German energy law treats a plug in system as small when the inverter delivers at most 800 VA and the panels add up to at most 2,000 Wp. The product standard DIN VDE V 0126 95, published in December 2025, is stricter: with an ordinary Schuko plug it covers panels up to 960 Wp. Between 960 and 2,000 Wp it expects a special plug, for example a Wieland connector, installed on a dedicated outlet.

Why the extra panels exist

The inverter limits what goes into the house to 800 VA, but panels rarely reach their rated power. More panels mean the inverter reaches its limit earlier in the morning, later in the evening and on cloudy days. That is why sets with four panels and a battery are popular: the battery takes what the inverter cannot pass on at noon.

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What we recommend

Up to 960 Wp on a Schuko plug you are within both the law and the standard. Above that, a set on a Schuko plug is legal under energy law but outside the standard, which can matter for insurance or after a fault. The cautious path is to have an electrician check the circuit and fit a dedicated outlet. Whatever the panel size, register the system in the Marktstammdatenregister within one month. A battery is outside the standard altogether, and a separate part for batteries is planned.

Rules in Germany with check date

What 800 Wp produces in Berlin and Vienna

The same calculation as our calculator, with PVGIS data, for 800 Wp of panels behind an 800 VA inverter: south at 35 degrees, south vertical on a railing and west vertical. More panels behind the same inverter mostly help in the morning, the evening and in winter; the calculator shows the gain for 960 and 2000 Wp at your address.

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