Battery storage systems are a significant factor in the energy transition as they store energy when excess power is available and feed it back into the grid when needed, for instance when no energy is being produced. Battery storage systems can adapt to almost any local conditions, i.e. they can be built almost anywhere and are highly flexible in terms of size.
Battery storage contributes to grid stability
Currently, battery storage systems are predominantly used to stabilise the grid in Europe. This is because renewables, such as solar and wind power, do not always deliver sufficient energy leading to grid instability. In such cases, battery storage systems are able to supply previously stored energy within seconds to keep the frequency at the necessary level of 50 Hz.
Identify and leverage potential
Today, battery storage is mainly deployed in this type of frequency containment reserve. The demand for these services will continue to rise in the future as the phase out of coal and nuclear and the simultaneous growth of renewables will make electricity generation increasingly volatile. As a result, peaks of excess and insufficient production are going to be more extreme. Battery storage can serve as a pivotal technology used to balance short-term fluctuations immediately. It provides the opportunity to store excess production from solar power plants during noon hours in order to make it available at night after the sun has set.
RWE has identified the need for and potential of battery storage and will continue to invest in the construction and operation of storage systems. Security of supply will need to be ensured at all times if the energy transition is to be successful in Germany.