Plug-in solar rules in Germany: limits and registration

Germany has the most settled rules for plug-in solar in Europe. A system with up to 800 VA of inverter output and up to 2,000 Wp of modules counts as a plug-in solar device (Steckersolargerät), and the only paperwork is a short online registration in the federal energy register. Checked: October 2026.

Germany at a glance

Topic	Rule	Source
Inverter output	max. 800 VA	Solar Package I, Renewable Energy Sources Act (EEG)
Module power	max. 2,000 Wp for the simplified rules	EEG
Registration	Marktstammdatenregister only, within one month of start-up	Bundesnetzagentur
Grid operator	no separate notification since May 2024	Solar Package I
Meter	old meter may run on until it is replaced	Solar Package I
Plug	not fixed by law; technical standard in place	VDE
Renting / flats	privileged measure since 17 October 2024	Civil Code (BGB), Condominium Act (WEG)
Checked	October 2026

The 800 VA limit and the 2,000 Wp allowance

The Solar Package I (Solarpaket I), in force since May 2024, raised the threshold for simplified plug-in systems from 600 to 800 VA. The figure refers to what the microinverter delivers into the socket, not to the panels on the railing. Module power may be higher: up to 2,000 Wp still counts as a plug-in device. In practice that means two larger modules, or modules facing east and west, can keep the inverter busy for longer each day without exceeding the feed-in cap.

The details of how inverter and module power interact are explained in our guide to the 800 W limit.

Registration in the Marktstammdatenregister

Every plug-in system must be entered in the Marktstammdatenregister run by the Bundesnetzagentur, the federal network regulator. For plug-in devices the form has been cut down to a handful of fields: operator, location, module power and inverter output. The deadline is one month after the system starts producing. There is no fee.

Before 2024 you also had to notify your local grid operator. That step has gone. The grid operator receives the register entry and checks whether the meter needs replacing.

Meters: old meters may stay for now

Many German households still have a traditional rotating-disc meter (Ferraris meter). In the past these had to be exchanged before a plug-in system could be used, because they might turn backwards when the panels produce more than the household uses. Under the Solar Package I such a meter may stay in place until the grid operator replaces it with a modern meter or smart meter. You do not have to wait for the swap before switching on.

If you later want a dynamic tariff or want to see exactly how much you export, a smart meter becomes useful. See dynamic electricity tariffs.

Schuko plug or feed-in socket?

For years the German debate centred on whether a plug-in system may use an ordinary Schuko socket or needs a special feed-in socket (often called a Wieland socket after a common make). The law does not prescribe either. The question is handled in technical standards: the VDE association has worked on a product standard for plug-in solar devices (DIN VDE V 0126-95) that covers the plug connection and the protective functions of the inverter.

Our practical advice: follow the manufacturer’s documentation, use a certified inverter with grid protection, and plug it into a socket on a circuit in good condition. Installing a new feed-in socket or changing a circuit is work for a qualified electrician, not a DIY job.

Renting and owner-occupied flats

Since 17 October 2024 balcony solar devices are a privileged measure under German tenancy law (§ 554 BGB) and condominium law (§ 20 WEG). Tenants and flat owners therefore have a claim to permission. The landlord or the owners’ association can still decide on the how, for example on the type of mounting, the side of the building or the appearance. Asking in writing before you buy is still the sensible order. More detail is in our guide for renters and flats.

Feed-in payment

Most owners of plug-in systems receive nothing for the electricity they export. The economics rest on self-consumption: every kilowatt-hour you use yourself is one you do not buy. Why that usually beats exporting is explained in feed-in or self-consumption.

What the rules do not cover

The simplified rules apply to plug-in devices. A larger rooftop system, a battery wired into the home’s distribution board or a permanent connection is a normal PV installation with normal registration and must be installed by an electrician. Plug-in batteries that sit between modules and inverter are a grey area that depends on the product; check the manufacturer’s notes and our overview of plug-in solar with a battery.

For a comparison with the rules next door, see Austria and Switzerland or the overview of all country rules.