Merchant energy storage has become an investable asset class in the UK, a provider of battery optimisation services has said, with the market moving away from an emphasis on contracted revenue streams for supplying grid services.

The business models and technologies underpinning the development of stationary energy storage markets are evolving rapidly. Dr. Kai-Philipp Kairies, Jan Figgener and David Haberschusz of RWTH Aachen University look at some of the key trends driving the sector forwards, in a paper which first appeared in PV Tech Power’s Energy Storage Special Report 2019.