The installation of the solar array was completed in September 2025, with the system entering operation earlier this month.
June 16, 2026
The Welsh Rugby Union (WRU) has switched on a 3,300-panel solar installation at Cardiff's Principality Stadium, claiming it to be the “largest rooftop solar deployment on a sports stadium in the UK”. 
The system, delivered by solar installer EvoEnergy, is expected to generate 1.24GWh. The installation of the solar array was completed in September 2025, with the system entering operation earlier this month following commissioning. 
The generation estimate was calculated by EvoEnergy using PVsyst modelling software, which incorporates long-term meteorological data, system design characteristics and site-specific shading assessments to forecast annual energy yields. 
Gavin Marshall, chief operations and finance officer, WRU said, “We’re not only reducing our carbon footprint but also strengthening the financial sustainability of the Union through the money we will save, creating long-term value that can be reinvested into Welsh rugby at every level.”   
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The organisation said the project forms part of a broader programme to decarbonise operations across Welsh rugby and reduce reliance on grid-supplied electricity. 
Alongside the solar deployment, the stadium has introduced a range of sustainability measures including LED lighting upgrades, rainwater harvesting systems, a well-water abstraction system for non-potable uses and sustainable food procurement initiatives. 
The solar installation comes as the WRU prepares to publish its first dedicated sustainability strategy later this year. The strategy will build on the organisation's 2022 sustainability policy and is expected to outline longer-term plans for reducing emissions and embedding environmental targets across the governing body's operations. 
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Shreeyashi Ojha
Senior Reporter, Informa
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