Solar Panels for Hospitals — PSDS-Funded, HTM-Compliant

The NHS in England has committed to net zero by 2040 — the most ambitious target of any health service in the world — with an interim 80% reduction by 2032. With over 1,200 hospital sites across the UK consuming around 11 TWh of electricity per year, on-site solar PV is now a standard component of every NHS Trust's Green Plan. The Public Sector Decarbonisation Scheme (PSDS) Phase 4 has allocated significant funding specifically to NHS estate decarbonisation, and rooftop solar typically delivers 8–25% of a hospital's annual electricity load with paybacks of 6–9 years.

Hospitals are exceptional candidates for rooftop PV for one simple reason: they never switch off. Operating theatres, imaging suites, intensive care ventilation, sterile services, and ward lighting run around the clock, producing a high, flat electrical baseload. That profile means self-consumption of solar generation is typically 95% or above — almost every kilowatt-hour the array produces is used on site at the full retail tariff rate, not exported at a fraction of its value. For Trust estates teams managing rising tariffs against frozen capital budgets, solar is one of the few clear-cut wins available.

The same logic applies on the private side. Independent hospital groups, day-surgery units, and diagnostic centres face the same energy cost pressure without access to PSDS grants — but they can use the Annual Investment Allowance or 50% First Year Allowance to expense the capital, and they answer to investors and corporate parents with published ESG commitments. Either way, the engineering is the same: a correctly sized rooftop array, modelled from at least twelve months of half-hourly meter data, installed without interrupting clinical operations.

That last point is where hospital solar differs from every other commercial sector, and it is the reason generalist installers struggle in healthcare. Installation must follow HTM 03-01 infection control protocols and HTM 06-01 electrical services standards. Installers working near patient areas need Enhanced DBS clearance. The final grid connection — the only operational touchpoint, typically four to eight hours — has to be scheduled with Trust Estates and theatre management as a planned maintenance window. We deliver to those standards on every project, with Authorising Engineer (Electrical) sign-off as standard.

The Public Sector Decarbonisation Scheme, administered by Salix Finance for DESNZ, provides capital grants to NHS Trusts, foundation trusts, and NHS-owned facilities — typically £500,000 to £10m+ per Trust application, at up to 100% of eligible capital cost. Combined heat pump and solar PV applications score particularly well, because the PV supplies the electricity the heat pumps consume.

The scheme is competitive, and the energy savings calculation must be auditable. We write the PSDS application as part of our fee, using SBEM and PVSyst modelling as evidence, and we support the Full Business Case and HMT Green Book treatment that Trust Boards need to approve capital projects. Where PSDS is oversubscribed, the interest-free Salix Decarbonisation Loan covers projects in the £100k–£1m range and is typically cash-flow positive in year one. Read the full breakdown on our PSDS funding page, or see typical hospital solar costs first.

Not every hospital roof suits solar, and we will say so in the feasibility report. 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: it typically covers 8–25% of load, which is why we model it alongside heat pump electrification rather than as a stand-alone gesture.

What solar will do, reliably, is convert unused roof area into the cheapest electricity a hospital can buy, with the capital often fully grant-funded. Our procurement guide explains the framework routes; our FAQs cover infection control, medical equipment interference, DBS clearance, and the other questions estates teams actually ask.