The Dolgarrog Hydro Power Station – Battery Energy Storage System is a 5,000kW energy storage project located in Conwy, Wales, UK.

The project was announced in 2017.


The Dolgarrog Hydro Power Station – Battery Energy Storage System is owned by RWE Renewables UK Swindon (100%), a subsidiary of RWE.

The key applications of the project are frequency regulation, voltage control and grid support services.

Contractors involved

RWE Renewables UK Swindon is the owner of Dolgarrog Hydro Power Station – Battery Energy Storage System.

Additional information

The hydro station in Dolgarrog was built in the early 1920s to provide electricity for the aluminium factory which stood on the site now occupied by Surf Snowdonia. Innogy Renewables UK Ltd. has submitted a planning application for a battery storage scheme at Dolgarrog Hydro Power Station on an existing sustainable brownfield site.


All publicly-announced energy storage projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects are sourced through secondary information sources such as country specific power players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.