Geothermal Engineering Ltd (GEL) has launched an energy breakthrough for the United Kingdom from its United Downs plant in Cornwall. For the first time, the country is consistently generating geothermal electricity and has begun commercial-scale, carbon-free lithium carbonate production.
Since February 26, the plant has been operating with uninterrupted geothermal power generation, capable of supplying at least 3 megawatts (MW) to the British grid. This electricity, acquired through a long-term contract by Octopus Energy, can power approximately 10,000 homes and represents a key step for the country’s energy security.
Geothermal Electricity and Critical Minerals
The system utilizes superheated water extracted from over 5,000 meters deep, in a closed loop that returns the fluid to the subsurface after use. This model eliminates reliance on weather conditions and strengthens supply with base-load renewable energy.
In parallel, GEL has initiated commercial production of battery-grade lithium carbonate, with a concentration of 340 ppm in the geothermal fluid. The plant will reach a capacity of 100 tonnes per year by 2026, with plans to expand to 18,000 t/year in the next decade. This quantity would be sufficient to equip 250,000 electric vehicles annually, covering more than 60% of projected registrations.
This domestic supply will enable the UK to comply with the Rules of Origin coming into force in 2027 and will drastically reduce the carbon footprint of energy storage.
Alliances for Technological Deployment
The development was made possible by Exergy International’s technology, which provided its binary cycle system, and financial backing from Kerogen-CX and Thrive Renewables. The initiative also has support from the British government’s Automotive Transformation Fund.
GEL plans to add an additional 10 MW of geothermal energy through new sites in Cornwall before 2030. The British Geological Survey estimates that the country’s geothermal potential could exceed 200 GW thermal, equivalent to more than 100 nuclear power plants.
Territorial and Energy Impact
Chancellor Rachel Reeves highlighted the project’s impact on reducing energy costs and boosting the local economy. For his part, Ryan Law, GEL CEO, emphasized that the co-location of generation and extraction maximizes investment, reduces environmental impacts, and accelerates the transition to a low-carbon economy.
Cornwall thus strengthens its role as a strategic hub in the UK’s energy and mineral security, with a replicable model that combines continuous energy, sustainable extraction, and long-term local benefits.
Source and photo: GEL