The Dinorwig Power Station nestled in the mountains of a former slate quarry in Llanberis, UK, on May 16.
Photographer: Mary Turner/Bloomberg
The UK’s Clean Power Future Relies on a 100-Year-Old Technology
Pumped hydro is key to creating vital energy storage, but the country has half what it needs to meet targets.
Hidden amongst the picturesque lakes and mountains of North Wales lies Europe’s largest battery.
For years, water has rushed through Dinorwig’s subterranean tunnels to drive vast power turbines, but the channels currently lie empty — for the first time in four decades.