NHS Trusts Boost Solar Investments to Cut Carbon Emissions

NHS energy use is under pressure from costs, carbon targets, and ageing estates

The NHS is one of the UK’s largest energy users. It runs hospitals, clinics, laboratories, offices, and community sites around the clock. As a result, it carries both high energy costs and a large carbon footprint. Recent moves to install solar panels and other on site renewable systems show genuine progress. However, they also highlight how far the NHS still relies on fossil fuels.

For many UK businesses, especially those supplying or working with the public sector, this matters. The NHS sets expectations for carbon reporting, tender requirements, and supplier standards. When it changes direction, the effects usually ripple through supply chains.

Energy prices have also sharpened attention. NHS energy bills have risen sharply since 2019, drawing money away from frontline services. This has pushed trusts to look harder at self generation, efficiency upgrades, and long term cost control.

Solar power has become the most visible part of this shift. Falling equipment costs and quicker payback periods make it easier to approve projects, even in tight capital conditions. As a result, many trusts now see rooftop solar as a practical financial decision, not just an environmental one.

At the same time, the scale of the challenge remains clear. Most NHS sites still depend mainly on gas and grid electricity generated from fossil fuels. Renewables are growing fast, but from a low base. This creates a mixed picture of progress and constraint.

For SMEs watching from the outside, the lesson is not about healthcare policy alone. It is about how a large, complex organisation is responding to the same pressures many businesses face, rising costs, carbon targets, and limited capital.

Recent funding rounds have accelerated NHS solar deployment

Over the past two years, several funding announcements have pushed NHS renewable projects forward. Much of this momentum comes from public funding aimed at cutting costs and emissions across public estates.

Great British Energy, a publicly owned company set up to support clean power projects, has played a central role. In 2025 it announced £200 million to support solar installations across England, including around 200 NHS sites and 200 schools. Separate funding of £9.3 million was allocated to sites in Scotland, Wales, and Northern Ireland.

This programme was described as the first national, dedicated solar scheme for the NHS. Around £100 million was assigned to more than 130 projects across 78 trusts, covering roughly 200 buildings. According to NHS England, these projects are expected to save around £8.6 million a year in energy costs, adding up to about £260 million over their lifetime.

Further funding followed in early 2026. Another £74 million was announced to support solar panels, battery storage, and energy efficiency works. This round covered more than 190 NHS sites across 82 trusts, as well as several non NHS public sector locations.

NHS England has stated that these combined investments could deliver annual savings approaching £30 million once fully operational. Delivery of most projects is planned for the 2025 and 2026 financial years.

Alongside national programmes, individual trusts have progressed their own capital funded schemes. Imperial College Healthcare NHS Trust, for example, announced £47.4 million of investment for heat pumps, solar arrays, insulation, and lighting upgrades across major London hospitals.

These developments have been reported by outlets including BBC News and the Financial Times, and outlined in briefings from the Department for Energy Security and Net Zero at gov.uk.

On site renewable generation has tripled, but reliance on fossil fuels remains high

The scale of recent growth is notable. NHS England has said that on site renewable electricity generation has tripled over the past five years. Starting from roughly 5,700 megawatt hours a year, production has risen to levels said to be enough to power around 7,000 homes.

Officials have also indicated that current funding could increase NHS solar capacity by more than 300 percent once installations are complete.

Despite this progress, fossil fuels still dominate NHS energy use. Data from early 2023 showed that around three quarters of NHS energy came from fossil fuels such as gas. Surveys also suggest that around 90 percent of NHS organisations still rely on fossil fuels for most of their energy needs.

This gap exists for several reasons. Many hospital buildings are old, complex, and hard to upgrade. Heating systems often rely on gas boilers that are expensive to replace. Grid connections can limit how much power sites can export or store.

There is also uneven uptake. Although a clear majority of NHS estates teams rate solar photovoltaic systems as the easiest renewable option, only about one in ten hospitals currently has solar panels installed.

These figures underline a wider truth. Tripling renewable generation sounds dramatic, but the starting point was small relative to total demand. Renewables are cutting costs and emissions at individual sites, yet they have not transformed the overall energy mix.

For SMEs, this mirrors a common pattern. Early projects deliver strong results, but scaling across estates or portfolios takes time, funding, and patience.

Individual trust projects show the financial case for self generation

Looking at specific examples helps explain why interest has grown so quickly. Several trusts have published figures showing clear operational savings.

Hull University Teaching Hospitals NHS Trust installed around 11,000 solar panels across its estate. During the summer, the trust reported saving roughly £250,000 per month on energy costs. While seasonal results vary, the scale of savings helped build internal support.

Royal Wolverhampton NHS Trust developed a large solar farm on a former landfill site equivalent in size to more than 20 football pitches. The trust has said the installation can power the hospital for much of the year, with projected savings of between £15 million and £20 million over two decades.

In Greater Manchester, Trafford Hospital has been promoted as the UK’s first net zero carbon inpatient hospital. Through extensive energy efficiency works and on site generation, the site aims to cut emissions by more than 90 percent by 2040, while saving around £100,000 a year.

Other trusts report more modest but still meaningful impacts. Leeds and York Partnership NHS Foundation Trust has said its solar installation meets around 15 percent of annual electricity demand at certain sites.

What links these projects is not scale alone. Each one ties carbon reduction directly to cost savings and operational resilience. Energy produced on site reduces exposure to market volatility and supports budgeting in uncertain conditions.

This commercial logic is familiar to many SMEs. The NHS examples simply apply it across larger, more complex estates.

Cost control, compliance, and supply chain expectations all come into play

Beyond energy bills, NHS decarbonisation has wider commercial implications. As a public body, the NHS must meet government targets on climate and reporting. These requirements increasingly flow down to suppliers.

The NHS has committed to reach net zero for directly controlled emissions by 2040, with an ambition to cut emissions by 80 percent between 2028 and 2032. Progress against these targets is tracked and reported publicly.

As reporting improves, trusts need better data from contractors and suppliers. This includes information on energy use, embedded carbon in products, and waste handling. Small suppliers often underestimate how quickly these requests are becoming routine.

Tender documents now regularly ask bidders to explain how they manage emissions and energy. While not every contract sets strict thresholds, poor responses can affect scoring.

There is also a risk angle. Rising energy costs have already diverted funds from care delivery. Trusts are keen to reduce exposure to future price shocks. Suppliers that can demonstrate efficient operations and stable pricing may look more attractive.

For SMEs working with the NHS, understanding this direction matters. It is less about copying large solar projects, and more about showing credible control of energy and carbon within your own operations.

We see similar pressures across other public sector clients. What starts with NHS estates teams often becomes a baseline expectation elsewhere.

Key points on NHS renewables and energy use

• The NHS accounts for roughly 4 percent of UK greenhouse gas emissions and spends around £1.4 billion a year on energy.
• On site renewable electricity generation has tripled in five years, but still covers a small share of total demand.
• About 75 percent of NHS energy came from fossil fuels as recently as 2023.
• Major funding rounds in 2025 and 2026 committed more than £300 million to solar, batteries, and efficiency upgrades.
• Most projects aim for delivery during the 2025 and 2026 financial years.
• Individual trusts report savings ranging from tens of thousands to millions of pounds a year.
• Only around 10 percent of hospitals currently have solar panels installed.

What SMEs should take from the NHS experience

When we talk to SMEs about the NHS examples, the first reaction is often that the scale feels irrelevant. Few small firms can install a solar farm or invest millions in infrastructure.

However, the underlying lessons are very relevant. The NHS has moved because energy costs became unmanageable and carbon targets became unavoidable. Those same pressures apply to smaller organisations, just with fewer zeroes.

The trusts that moved early often built internal evidence through pilot projects. A single roof or building proved the savings case. That evidence then unlocked wider support. SMEs can follow the same pattern.

Another lesson is realism. Even with strong funding support, most NHS sites still rely on fossil fuels. Progress is incremental. This aligns with what we advise clients, focus on credible, step by step improvements instead of absolute claims.

From a supply chain perspective, NHS expectations are a useful signal. If you supply public bodies, you should assume that energy and carbon questions will increase, not fade away.

At SBS, we help SMEs translate these signals into proportionate actions. That might involve basic carbon reporting, energy procurement reviews, or preparing evidence for tenders. For example, our support for net zero planning focuses on practical compliance, not abstract targets.

We also see rising interest in energy cost control. Our guidance on energy procurement addresses the same volatility that pushed the NHS toward self generation.

The key point is not to copy the NHS, but to understand the direction of travel and respond at the right scale.

Further reading

Several public sources provide detailed, up to date information on NHS energy use and decarbonisation.

NHS England publishes reports and announcements through its sustainability programme, including statements from its Chief Sustainability Officer. These are available via the Greener NHS programme.

National energy policy and funding announcements are outlined by the Department for Energy Security and Net Zero at gov.uk.

For independent reporting, BBC News and the Financial Times continue to cover NHS energy costs and infrastructure investment in depth.

Following these sources helps businesses understand not just what the NHS is doing now, but where expectations across the UK economy are heading.