Naked Energy said this makes it the first solar thermal OEM in the UK to do so.
December 16, 2025
British solar thermal and solar PV developer Naked Energy has launched a dedicated system design service for integrated solar thermal systems.
Naked Energy said this makes it the first solar thermal OEM in the UK to do so. It will provide plans for businesses looking to integrate its technology into their overall energy system and engineer Sam Notter has joined the company as principal design engineer to lead the new operation.
Naked Energy offers heat-as-a-service through the installation of its Virtu solar technology, which uses modular solar collectors to heat water up to 120°C. It also offers a system that combines photovoltaic generation and solar thermal, generating electricity as well as heating up to 75°C. According to the company, the combined generation tech saves three times more carbon per square metre than standard solar PV panels.
The company also states that, thanks to modular assembly and compatibility with multiple roof types, installation can be faster and cheaper.
It is a complementary technology that integrates with existing heating technology, such as heat pumps, most effective when Virtu is used to pre-heat the system to be maintained by a backup heat source.
The new system design offering from Naked Energy will use a proprietary in-house design tool to simulate heating system interactions and provide accurate performance forecasts for commercial and industrial businesses with year-round heat demand.
In July 2024, the company secured £17 million of new equity in a Series B first close, with investment led by existing partner E.ON Energy’s Infrastructure Solutions arm. Banking group Barclays co-invested.
While Naked Energy said that its core customer base is heat-intensive commercial and industrial businesses, it has also installed the technology in novel cases, such as on the Grade I-listed British Library’s rooftop. The company’s Virtu technology has integrated mounting and is self-ballasting, leaving no need for roof penetration and making it ideal for the low-impact install needed on a listed building.
The installation provides hot water and heating for the library, while also helping to maintain the precise temperature and humidity required to preserve the British Library’s national collection.
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Molly Green
Senior Reporter, Informa
Molly joined the team in 2024 and has led coverage on the UK sites. Now shifting to a more global view, Molly is interested in how legislation shapes market dynamics, covering the intersection of policy design, investment patterns, and energy transition pathways.
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