Hospital Solar FAQs: What NHS Estates Teams Ask
Direct answers with real numbers, updated for 2026.
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These are the questions NHS estates directors, sustainability leads, facilities heads and private hospital operations teams ask about solar. They cover the money (illustrative costs, NHS funding after PSDS Phase 4, the Great British Energy programme), the governance (Trust Board approval, PFI contracts, procurement frameworks) and the clinical-environment questions that only matter in healthcare: HTM 03-01 infection control during installation, HTM 06-01 electrical compliance, medical equipment interference and DBS clearance for contractors in patient areas. Where a question deserves a longer answer, the relevant page is linked. If your question is not here, send it in.
How much do solar panels for a hospital cost in the UK?
No published benchmark covers hospital-scale rooftop solar, so treat any number as a planning range. This site's illustrative model puts an acute hospital array (about 300 kW to 2 MW) at roughly £250,000 to £1.6m, community hospitals (100 to 500 kW) at roughly £90,000 to £450,000, mental health units (100 to 400 kW) at roughly £90,000 to £360,000 and GP surgeries (20 to 80 kW) at roughly £22,000 to £90,000 (see solar for GP surgeries). These are not quotes; the costs page lists the assumptions, and a surveyed quote is the only reliable number.
What grants are available for NHS solar?
PSDS Phase 4 closed to new applications on 25 November 2024 and no further round is announced. No Great British Energy NHS solar application window is open now. The rounds so far in the Great British Energy NHS solar programme run with NHS England: a first round of £100 million (March 2025), an extension, and a further £25 million for 2026/27 whose application window closed on 22 June 2026. Other routes are trust capital and a power purchase agreement. See the funding page for dates and sources.
How does solar fit with NHS net zero targets?
The NHS has set net zero by 2040 for the emissions it controls directly, with an 80% reduction between 2028 and 2032, and net zero by 2045 for the emissions it can influence. Trusts publish a Green Plan with their renewable energy commitments (see where rooftop solar fits in an NHS Green Plan and the NHS net zero explainer), and on-site generation is one of the measures an estates team can deliver inside that timeline.
Can we install solar on a PFI hospital?
Often yes, but the contract decides. If the PFI partner pays the energy bill, the savings flow to them, so the economics depend on whether the partner co-invests or shares savings with the trust. Check who owns roof alterations and how the agreement allocates energy-saving benefit before any design spend.
How do we maintain operational continuity during install?
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.
What about infection control during install?
HTM 03-01 (Infection Control in the Built Environment) applies. Contractors are inducted by the Estates and infection-prevention teams, construction zones are segregated from clinical areas, negative-pressure zones are maintained where they apply, and PPE protocols are followed. Ask any bidder to show how they have worked in comparable clinical areas.
Will solar interfere with medical equipment?
No. Modern grid-tied PV inverters comply with EN 50549 and produce clean sine-wave output indistinguishable from grid supply. The design should follow HTM 06-01, be reviewed by the trust's Authorising Engineer (Electrical), and have EMC compliance verified for sensitive equipment areas.
Do installers need DBS clearance for hospital sites?
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. Mental health sites need additional safeguarding awareness, and children's hospitals need Children's Barred List checks.
How long does an NHS hospital install take?
It varies by trust, funding route and site. The usual stages are feasibility, funding and business case, procurement, design and approvals, installation and commissioning. Governance and the funding calendar, rather than the physical installation, normally set the overall timeline: the roof work on even a large hospital array is a matter of weeks to a few months, while approvals and procurement take longer. The process page sets out the sequence.
Can we use NHS frameworks for procurement?
Yes, and it is common. Public sector frameworks pre-qualify suppliers and shorten procurement; frameworks run by Crown Commercial Service, NHS Shared Business Services and ESPO are used across the public estate. Check which your procurement team already has access to and whether its lots cover on-site solar. Work is then awarded by direct award or mini-competition depending on the framework rules.
What's the impact on ERIC reporting?
On-site generation reduces the electricity a site buys from the grid, and ERIC (Estates Returns Information Collection) records estates energy and carbon data. Check with your estates reporting lead how generation is recorded in ERIC and the Green Plan annual return, since the treatment is set by NHS England guidance.
Can we combine solar with heat pumps for whole-estate decarbonisation?
Yes. Heat pumps electrify heating (currently gas or oil) and rooftop PV supplies part of the electricity they use, so the two are usually modelled together. PSDS, which closed to new applications in 2024, was designed mainly around low-carbon heat; for new work, ask your regional Greener NHS team which funding routes cover heat and solar together.