Thousands of electric vehicles are now balancing the Danish power grid in real time

A new kind of power plant has gone live in Denmark. It is made up ofthousands of electric vehicles parked in private driveways and garages. Througha partnership between Norlys Energi, Hybrid Greentech and Monta, household EVchargers are now delivering automatic Frequency Restoration Reserve (aFRR) toEnerginet, Denmark’s transmission system operator. The chargers adjust theirpower every second in response to grid signals. This is not a pilot. It is alive, commercial service running daily in production.

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Denmark’s grid is among the most renewable-intensive in the world, withwind and solar often exceeding 100% of demand. Variable production creates twochallenges: the need for fast-acting reserves, and surplus green energy thatgoes to waste. Shifting EV charging to low-price, high-renewable hoursaddresses both. It absorbs more green energy while giving Energinet thereal-time flexibility it needs, without fossil backup.

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“This is what the green transition looks like in practice. We are takingassets that already exist in people’s homes and using them to solve one of thehardest problems in renewable energy: keeping the grid stable when the windstops or the sun goes behind a cloud,” says Hybrid Greentech CEO Rasmus Rode Mosbæk.

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With hundreds of thousands of home EV chargers already installed inDenmark, and the number growing fast, aggregated EVs represent flexiblecapacity comparable to a conventional power station.

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Distributed assets doing the work of power plants‍

The partnership shows that thousands of small chargers, aggregated andcontrolled in real time, can replace a service that once required burningfossil fuels. The technology works today and delivers real balancing energyevery day. It places zero burden on consumers: no hardware changes are needed,and charging schedules are fully respected. The model scales linearly with EVadoption, and every megawatt delivered by EVs is one less needed from gasturbine backup.

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How it works‍

Real-time charger data flows to Hybrid Greentech’s trading platform via Monta’scharge point management system. Flexible capacity is forecast and bid intoEnerginet’s daily aFRR auction. Energinet sends a power setpoint every second,and the platform adjusts charging across the portfolio accordingly. Deliveredenergy is measured and verified automatically. EV owners see no change. Theircars charge as expected.

About the partners‍

Norlys Energi is Denmark’s largest integrated energy and telecom group, serving3.5 million customers.
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Hybrid Greentech provides the full trading and control technology stack, frommarket access to asset control.

Monta is a Copenhagen-founded EV charging software platform used by more than1,000 operators across Europe.