SSE's Coire Glas pumped storage hydro project in the Scottish Highlands could be a "game-changer" for the UK's clean energy future. This project, capable of powering three million homes for up to 24 hours, could nearly double the country's current electricity storage capacity.

Pumped storage hydro is a crucial technology for balancing the grid, especially as renewable energy sources like wind and solar become more prevalent. By storing excess energy during periods of low demand and releasing it when demand is high, pumped storage can help ensure a reliable and sustainable energy supply.


The UK government's recent decision to introduce a cap and floor investment framework for long-duration storage projects is a significant step forward. This framework will help to unlock private investment and accelerate the development of projects like Coire Glas.

SSE has already made significant progress on the Coire Glas project, completing a £100 million exploratory works program and drilling a 1.2km tunnel into the hillside. The company is now eagerly awaiting further details on the government's plans to implement the cap and floor framework.

If approved, Coire Glas could be operational in the early 2030s, providing a vital boost to the UK's clean energy ambitions.