Germany's meter rules now count power a parked EV sends back

On 1 October 2026 the Bundesnetzagentur, Germany's federal network regulator, adopted a determination that changes how a parked electric car is counted on the grid. The text is called MiSpeL, short for Marktintegration von Speichern und Ladepunkten, the market integration of storage systems and charging points. It does not install a charger. It decides which kilowatt-hours, once they leave a battery and re-enter the network, still qualify for renewable support and which ones can be netted off against levies and grid fees.

Until this determination, subsidised green electricity and ordinary grid electricity generally had to be kept apart inside a storage system. Support under the EEG, the Erneuerbare-Energien-Gesetz, the renewable-energy act, was available to batteries that held only eligible renewable power. A bidirectional charging point was left outside that treatment. The regulator's definition of that phrase is specific: a point that can charge an electric vehicle and, like a stationary home battery, feed electricity from the car back into the network.

Klaus Müller, president of the Bundesnetzagentur, put the aim in the agency's press release:

„Die MiSpeL-Festlegung wird im Markt dringend erwartet. Sie wird unzählige große und kleine Stromspeicher sowie Ladepunkte für das Stromsystem aktivieren. Damit können Millionen von engagierten Haushalten zu aktiven Gestaltern der Energiewende werden“

A close translation: the determination had been urgently awaited; it would activate countless large and small storage systems and charging points for the power system; millions of committed households could become active participants in the energy transition. He added that bidirectional use of charging points helps electric mobility and the power system, that the rules were adjusted again so the simplifications reach charging points more fully, and that Germany could become a pioneer.

For a household, the money is attached to electricity that is sent back, not to electricity that is driven away. Renewable support can now remain on renewable electricity that sat in a battery, including a car, and was later exported. Grid electricity that was stored and then returned can be netted, so the levies and network charges on that returned slice come down.

The delineation option, Abgrenzungsoption, is open to every user. It calculates the eligible renewable volume and the volume that can be netted from measured data. The formulas usually require two meters. In special cases one meter is enough.

The flat-rate option, Pauschaloption, is the simpler path for a house with a solar array of up to 30 kilowatt-peak, the rated size of the panels. One meter is the normal arrangement. It is also the path that cannot be used until the European Commission clears the underlying statute under state-aid rules. The press release says that wait in so many words. A household chasing the flat rate is waiting on Brussels, and then on its grid operator, not on a software prompt in the car.

The August draft had been criticised because a buffer in the flat-rate math, which the regulator calls an indifference band, treated a slice of exported electricity as neither subsidised solar nor fee-relieved grid power. The background paper published with the 1 October text says the flat-rate factor that sizes that band for charging points was cut from 0.5 to 0.2, and describes the cut as meeting a central demand from market participants. A smaller factor means a smaller band of exported energy that earns neither the renewable payment nor the levy relief. The paper does not convert that factor into a household's annual bill.

The agency also said the additions allow MiSpeL with unsubsidised generators and with no on-site generation, so a driveway without solar panels is no longer written out.

The German auto industry association, the VDA, issued a statement dated 30 September 2026 that treated the determination as published. Hildegard Müller, the association's president, is not the regulator's Klaus Müller. Her statement said:

„Mit der heute veröffentlichten Festlegung zur Marktintegration von Speichern und Ladepunkten (MiSpeL) hat die Bundesnetzagentur den Weg dafür bereitet, dass das bidirektionale Laden in Deutschland zu einer Erfolgsgeschichte werden kann. Mit der endgültigen Beseitigung der Doppelbelastung bei den Stromnebenkosten ist nun ein entscheidender Schritt in Richtung Massenmarkt für das bidirektionale Laden getan.“

A close translation: with the determination published that day, the regulator had prepared the way for bidirectional charging in Germany to become a success, and removing the double burden in electricity surcharges was a decisive step toward a mass market. The statement describes homes without their own solar array as able to use a one-meter model, and it asks grid operators to apply the requirements quickly and uniformly across the country. It then points at unfinished law. In the parliamentary work on the 2027 renewable-energy act, Müller said, flexible export from bidirectional cars must not be slowed by flat limits on feed-in power.

pv magazine's account of the package matches the press release on the two options, on the general equivalence between bidirectional charging points and stationary storage, and on the state-aid hold. InsideEVs, the following day, separated the hardware from the paperwork: a socket that runs a small appliance is vehicle-to-load, and does not by itself make a car eligible to trade electricity with the grid.

The timetable is where a driver can be misled by the word "adopted." Network operators and metering operators have until the end of September 2027 to implement the determination. Until then, either accounting option applies only with the consent of both. The regulator describes a framework that can be used, with that consent, during the transition. The VDA describes a mass market that still depends on operators behaving the same way nationwide, and on the 2027 renewable-energy bill not capping exports. A car parked in a German driveway on 2 October did not gain a payout button. It gained a rule for counting the kilowatt-hours it can send back, once the meter, the operator and a genuinely bidirectional car are all in place.