A total of 184 Solarwatt glass-glass solar modules have been installed on the roof of the South Quire. These high-efficiency modules will produce nearly 70,000 kilowatt-hours of clean energy annually - enough to power approximately 40 average UK households. This accounts for a third of York Minster’s energy needs and reduces its CO2 emissions by 13 tonnes per year.
Integrating sustainability into heritage
Alex McCallion, head of building at York Minster, highlights the importance of using renewable energy in the cathedral: ‘This project demonstrates that historic buildings can embrace modern energy solutions without compromising their heritage.’ The PV system strengthens the building envelope, helping York Minster withstand extreme weather caused by climate change, which has already accelerated the deterioration of its stonework.
See also: Fraunhofer ISE and partners develop standardised BIPV solution
The Solarwatt modules were specifically chosen for their minimal carbon footprint—50% smaller than that of conventional solar modules—and their compliance with the highest safety standards (IEC Class A). Their robust design ensures reliable performance under mechanical stresses and extreme weather, making them ideal for the roof of a centuries-old structure.
Preserving history through innovation
‘This installation is a milestone for renewable energy in historic buildings,’ says Neal Goddard, Managing Director of Solarwatt UK & Ireland. Nicola Newby, Operations Director at ACT, adds: ‘Our team ensured that the system seamlessly integrates with the Minster’s unique architectural features while meeting rigorous safety and efficiency standards.’
Also interesting: Innovations for solar facades unveiled at BAU 2025
This solar roof installation is a key component of York Minster’s broader sustainability plan, which aims to future-proof the cathedral while maintaining its architectural integrity. With further projects in development, the initiative exemplifies how historic buildings can contribute to climate action through innovative approaches to their building envelopes.
