ST. CLARA LIGHTHOUSE · SAN SEBASTIAN, SPAIN
RENOVATION
Onyx Solar significantly contributed to the historic refurbishment of the emblematic Santa Clara’s lighthouse in San Sebastian, Spain. The installation of amorphous silicon photovoltaic glass for the new skylight marked a milestone groundbreaking integration of photovoltaic technology into historical buildings. To enhance safety, an anti-slip treatment was applied to the exterior surfaces, enabling ease of access. These insulating photovoltaic glass units were designed with a 16 mm air spacer to achieve the U-value required by the design team. This lighthouse, that was constructed in 1864 and it was recently refurbished to host a unique bronze sculpture of Cristina Iglesias aims to be transformed into a captivating tourism attraction.
The photovoltaic glass chosen for this project was meticulously customized to meet both the aesthetic and functional requirements of the refurbishment. Its nominal power can reach 40 Wp per square meter, providing a reliable source of clean energy while also offering protection from the harsh coastal weather of San Sebastian. With a visible light transmission and g-value of 10%, the photovoltaic glass effectively keeps the interior cool by minimizing solar heat gain, reducing the need for artificial cooling. By integrating this advanced technology while preserving the historical integrity of the lighthouse, Onyx Solar has helped ensure a sustainable future for this iconic structure. The project demonstrates how photovoltaic glass can be skillfully applied to heritage buildings, maintaining their cultural significance while embracing modern energy solutions.
Donostia San Sebastián, a vibrant coastal city in Spain, is known for its commitment to sustainability, cultural heritage, and innovative urban development. The city actively integrates green energy solutions into its infrastructure projects, demonstrating leadership in environmental responsibility. By choosing Onyx Solar’s photovoltaic glass, it enhances the energy efficiency of its public buildings, contributing to its long-term sustainability goals while maintaining its rich architectural and cultural identity.
