A 48 MW battery in northern Germany is now ready to supply reserve power to the European grid.

Dutch utility and battery owner Eneco said the battery, Europe’s largest, is now operational and will be used in the primary reserve market.
Eneco- Mitsubishi battery
The battery is in Jardelund near the Danish border in a region with a very high saturation of wind power turbines battling with grid congestion issues.

The battery, constructed in just eight months, has a capacity of 48 MW and contains around 10,000 lithium-ion batteries, sufficient to store power for over 5,000 German households for 24 hours.

Eneco and co-owner Mitsubishi are also investigating the possibility of connecting local wind farms to the battery, allowing for temporary storage in the event of overproduction to prevent a curtailment of wind production to keep the grid stable.

Germany’s rapidly growing utility-scale battery market is forecast to almost double this year to over 300 MW, with another 100 MW of projects expected to come online early next year, according to German storage lobby group BVES.

The battery will use Li-ion technology, with claimed efficiency of 97-98 per cent and >9,500 cycle lifespan (to retain 80 per cent of initial capacity). It will come with a 15-year warranty.

Eneco has experience elsewhere in storage, though at smaller scales, aggregating residential battery systems to assemble virtual power plants in the Netherlands and Germany, using Tesla Powerwall batteries. Their relationship with Mitsubishi goes back to 2013, when the companies inked a partnership to develop offshore wind plants in Europe.

Battery storage in the energy sector is a key pillar of Electrify Europe conference and exhibition in Vienna next month. For more details click here.