Denmark’s electric car fleet now carries 55.5 GWh of battery capacity, according to figures from Mobility Denmark. On 30 September 2026 there were 718,310 electric cars in the Danish car park, and their combined capacity was 9 percent higher than three months earlier and 47 percent higher than a year ago.
A growing battery reserve on Danish roads
The batteries exist first of all to move people and goods, but Mobility Denmark points out that the capacity now reaches well beyond transport. With this many cars on the road, the sum of their batteries is becoming relevant for how Denmark uses and stores electricity.
Allan Skytte Christensen, chief economist at Mobility Denmark, says that the right solutions could eventually let electric cars help make better use of green power and add flexibility to the energy system. He stresses that this depends on the necessary framework conditions keeping pace with the development.
How vehicle to grid could change the picture
One of the technologies that could bring car batteries closer to the grid is vehicle to grid, or V2G. It allows electricity to flow from the car’s battery back into the power grid when it is needed.
In the longer term, this opens the door for electric cars to help balance the grid and to absorb more of the output from solar and wind when production fluctuates. Mobility Denmark also sees a role for cars as part of a more resilient energy system, for example as a resource during a power outage.
Europe is already moving, Denmark is not yet
Development is under way elsewhere in Europe. There are currently four concrete V2G offers in the EU that private customers can order, located in Germany, France and the Netherlands. No comparable offer exists in Denmark yet, and the solutions that are available still come with a number of limitations.
Even so, Mobility Denmark argues that these examples show the technology is moving from theory to practice.
Realistic expectations, but no reason to look away
According to Skytte Christensen, the large number of electric cars gives Denmark a significant V2G potential, and it is worth examining which conditions are needed for the technology to develop domestically. He describes the field as still early and cautions against promising more than the technology can deliver today, while adding that the opportunities should not be overlooked.
If the right frameworks fall into place, he says, the country’s many electric car batteries could in time become a valuable resource for both the power grid and the use of green electricity.
