On Tuesday, Denmark's reportedly largest battery, located in the town of Hasle on Bornholm, will be inaugurated. The energy group Ewii is behind the new battery. It has taken the group a little more than two years to build. This is reported by Børsen.
The battery's role is, among other things, to take power from the electricity grid when there is an overproduction of solar and wind energy. Here, the battery can store the excess power.
- It can take some of the peaks in production from solar cells and wind turbines and move it to other hours, says Brian Vad Mathiesen, professor of energy planning at Aalborg University.
At the same time, on days with little sun and no wind, when there is a deficit of renewable energy, the battery can send the stored power back into the electricity grid.
- It is not the intention of such a battery to supply power on a winter day when the sun has not shone for 14 days. It is intended to provide stability to the electricity grid on Bornholm. It may well have a small effect on electricity prices, he adds.
Cannot replace power plants
The battery has a capacity of 30 megawatts and 43 megawatt-hours. But that does not mean that batteries like this can replace power plants, says Brian Vad Mathiesen.
- Having more keys to play on provides greater security of supply. If you talk in the sense that we do not need power plants, you are wrong. It can reduce some operating hours at the power plant. It cannot replace that. When the battery is empty, the power plant must be used.
The battery will apply to electricity consumers on Bornholm, but more similar batteries will be installed around the country, says Brian Vad Mathiesen.
The battery can supply the island with electricity for just under an hour and a half. According to Brian Vad Mathiesen, it is entering a market with several competitors.
- These batteries must compete with other technologies that can deliver system services, such as immersion heaters and heat pumps in district heating, Power-to-X and electric cars that are ready to charge.
/ritzau/
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