EnBW believes a battery it launched this week at Heilbronn coal-fired power plant can be replicated throughout its fleet.

Bosch and EnBW constructed a battery at the Heilbronn plant, with the aim of suppling the balancing power market at times when demand outstrips supply.
EnBW
“We believe, that the battery solution we developed and built in Heilbronn can definitely be rolled out to other power plants,” press spokesperson Jörg Busse told Power Engineering Interntaional. “It doesn‘t matter if coal-fired or renewable. The installation of a battery in combination with a coal-fired power plant has positive influence on the CO2 footprint.”

The battery is small, with a maximum performance of just 5 MW. The Heilbronn site’s most modern unit has 750 MW of electric capacity and 550 MW heat.

However, it can absorb and release one fifth of the volume a big power plant normally releases into the balancing market at advantageous costs, because it can use existing staff, operations and grid access.

The balancing market is vital to overcoming the intermittency inherent in renewable energy, which dominates the German power market. Batteries help stabilise grid swings within seconds.