Fona Keysell, Director of Consultancy + Jim Howlett, Business Development Manager – Public Sector at RenEnergy UK Ltd.
With NHS England spending approximately £1.4 billion on energy, and demand only rising, the value of solar photovoltaic (PV) is not just a trend, it is increasingly a strategic consideration for NHS estates as decarbonisation continues to fundamentally change how energy is produced and consumed on site. For estates directors and energy managers tasked with delivering net zero ambitions while maintaining resilience and affordability, on-site generation is central to long term planning.
The emergence of electrification
Healthcare estates are extremely energy intensive. Beyond lighting and HVAC demand, many host operations 24/7 and rely on power for specialised medical equipment. Demand is constant, and systems that can produce clean energy, affordably on-site are increasingly attractive.
Currently, an era of electrification is being ushered into the healthcare sector. Electrification enables displacement of fossil fuels when paired with low-carbon electricity generation allowing heat and transport to be decarbonised. When implemented correctly, electrification can reduce greenhouse gas emissions, improve system efficiencies, and support long-term cost control.
However, as with every conversation that centres around sustainability and decarbonisation, it must be grounded in operational reality. The electrification of heat is significantly increasing electricity demand across NHS estates. This demand is increasing faster than on-site generation capacity.
It’s a pattern that is becoming increasingly common across NHS estates in England and Wales. As more trusts move away from reliance on gas, the reality is that energy costs may rise before the benefits of decarbonisation are fully realised.
Decarbonisation is not something healthcare estates can delay or ignore. As national policy, funding mechanisms, and public accountability continue to evolve, estate teams are under growing pressure to act. This means that if electrification is to be pursued at scale, it cannot be delivered in isolation. Measures are required that both offset increased electrical demand and mitigate long-term exposure to energy price volatility. This is where solar PV presents a clear and compelling opportunity.
Solar as a solution
Solar is increasingly deployed as the solution across the healthcare sector. Implementing and expanding a solar PV portfolio allows healthcare estate managers to transition toward electrification with greater confidence, while meeting rising electric demand and reducing reliance on imported grid electricity. We are already seeing many healthcare estates maximise rooftop potential, leading to additional deployment options, such as carports integrated with electric vehicle charging infrastructure, being explored.
But this is not as simple as including solar as a simple “add-on” project. The relationship between solar and wider estate infrastructure has evolved, and a more integrated, front-loaded approach to project development has become critical. Large NHS solar schemes now sit within a complex landscape of heat electrification, grid capacity constraints, private wire arrangements, export limitations, and site-wide energy controls.
There are projects where funding has been secured, yet systems remain at risk from not being fully energised or optimised. This can be due to Distribution Network Operator (DNO) constraints, protection settings, or control strategies that have not been adequately considered at an early stage. The result is delay, re-design, and additional cost, often at a point where time, capital, and internal resource are already constrained.
By engaging early with experienced solar and energy infrastructure specialists, healthcare estates can ensure that grid capacity, export management, future electrification plans, and operational constraints are fully understood and designed into the scheme from the outset. This engagement should ideally take place before funding applications are submitted, to ensure value for money is protected. The objective is to avoid stranded assets and ensure that solar actively supports the wider decarbonisation strategy of the estate, rather than creating unintended challenges in the longer term.
Pace setting in healthcare
While decarbonisation remains a hot button issue for the sector, electrification alone is not a complete solution. Solar PV provides a critical balancing mechanism, helping healthcare estates maintain operational resilience while progressing towards net zero targets, without disproportionately increasing operating costs.
Health estates can realise significant financial and operational benefits by expanding their PV portfolios. Rooftop systems remain the foundation for many sites, but the next phase of deployment increasingly includes solar carports, particularly where electric vehicle infrastructure is also required. To deliver these projects effectively, collaboration and early partnerships with technical specialists is essential ensuring that solar generation, electrification, and grid constraints are considered as part of a single, coordinated energy strategy.
The healthcare estates that invest in well-planned solar infrastructure today will help set the pace for the sector. Leadership will not be defined by speed alone, but by the quality of planning, integration, and delivery. Those organisations that act early, with expertise rather than urgency are likely to become reference points for how decarbonisation can be achieved in a way that is resilient, affordable, and operationally sound.
Find out more: https://www.renenergy.co.uk/
This article appeared in the Jan/Feb 2026 issue of Energy Manager magazine. Subscribe here.