Solar Panels for Hospitals: NHS Funding, Costs and HTM Compliance

The NHS has two net zero targets (NHS England, Greener NHS): net zero by 2040 for the emissions it controls directly (the NHS Carbon Footprint), with an 80% reduction between 2028 and 2032, and net zero by 2045 for the emissions it can influence (the NHS Carbon Footprint Plus), with an ambition of an 80% reduction between 2036 and 2039. Rooftop solar is one of the few measures an estates team can plan, fund and deliver inside that window, and it sits in most trusts' Green Plans. Funding has changed since 2024: the Public Sector Decarbonisation Scheme has closed to new applications and the live public route for NHS solar is the Great British Energy programme (see the funding page for dates and sources).

Hospitals are strong candidates for rooftop PV because they rarely switch off. Operating theatres, imaging, ITU ventilation, sterile services and ward lighting give a high, steady electrical baseload, so most of what an array generates tends to be used on site at the full import price rather than exported. The share depends on the half-hourly data for the site, which is why a sizing study starts with twelve months of meter data and not with a rule of thumb.

The same logic applies to independent hospital groups, day-surgery units and diagnostic centres, which face the same energy costs without access to public grant funding. They can use capital allowances (the Annual Investment Allowance, and the 50% first-year allowance on special-rate plant) to shelter the spend, and they usually answer to investors with published ESG commitments. The engineering is the same either way: a correctly sized rooftop array, modelled from at least twelve months of half-hourly data, installed without interrupting clinical operations.

That last point is where hospital solar differs from other commercial sectors. Work on a live hospital site is expected to follow HTM 03-01 infection-control practice: contractor induction by the Estates and infection-prevention teams, segregated construction zones, and maintained negative-pressure areas where they apply. Wards, theatres and ITU normally keep running during roof work; the usual operational touchpoint is the final grid connection, which is planned with Estates and theatre management as a scheduled window. Electrical design on healthcare premises is expected to be reviewed against HTM 06-01 (electrical services supply and distribution), and trusts normally involve their Authorising Engineer (Electrical), the AE(E), in reviewing and authorising new generation connected to the hospital distribution system. Trusts typically expect Enhanced DBS clearance for contractors working in patient areas, with Barred List checks for children's and mental health settings. Ask any bidder how this is evidenced across the whole on-site workforce, not just the supervisors.

PSDS Phase 4 took applications from 9 October to 25 November 2024 and is now closed to new applications; awards already made continue to be delivered (gov.uk scheme page). The live public route is the Great British Energy solar programme run with NHS England: £100 million in a first round announced in March 2025 (NHS England), an extension in 2025, and a further £25 million for 2026/27 whose application window closed on 22 June 2026 (HEFMA). Ask your regional Greener NHS lead where the programme stands.

Outside those two routes, NHS trusts fund solar from their own capital, and some use a power purchase agreement, in which a funder owns the array and the trust buys the electricity (see the NHS solar PPA guide). Read the full breakdown on the funding page, or see illustrative hospital solar costs first.

Not every hospital roof suits solar. Victorian and Edwardian estates often have weak or heavily serviced roofs where structural reinforcement erodes the economics. PFI hospitals need the energy risk allocation in the contract checked before anyone spends money on design: if the PFI partner pays the energy bill, the savings flow to them and the project only works as a co-investment. And rooftop PV alone will not get a trust to net zero, which is why it is usually modelled alongside heat pump electrification rather than as a stand-alone measure.

What solar can do is turn unused roof area into some of the cheapest electricity a hospital can buy. The procurement guide explains the framework routes; the FAQs cover infection control, medical equipment interference, DBS clearance and the other questions estates teams ask.

By healthcare estate

• Solar for NHS trusts: governance, funding and HTM compliance
• Private hospitals and care groups: allowances, finance and PPA
• GP surgeries and health centres: the landlord and ICB questions
• Dental and medical practices: sizing, VAT and allowances
• Energy resilience: solar and storage alongside backup power

Funding, cost and delivery

• NHS solar funding in 2026: PSDS has closed, Great British Energy is the live route
• Illustrative costs and payback by estate type
• NHS procurement guide: frameworks, evaluation, PFI sites
• How a project runs, stage by stage
• FAQs: infection control, DBS, medical equipment, ERIC

Articles

• PSDS vs Great British Energy: NHS solar funding in 2026
• PSDS application timing: what Phase 4's window taught
• How much do solar panels for a hospital cost?
• HTM 06-01 solar: what NHS estates teams need to know
• UK hospitals with solar panels: what estates teams can learn
• Building solar into your NHS net zero estates plan
• Hospital roof surveys for solar