Solar Panels for NHS Trusts

PSDS-funded rooftop solar for acute, community, and mental health estates — with the application, the business case, and the HTM compliance handled by one team.

The estates problem solar actually solves

Every NHS Trust in England now operates under two fixed constraints: the NHS net zero commitment — an 80% emissions reduction by 2032 against the 1990 baseline, full net zero by 2040 — and capital that is severely constrained under DHSC limits. The targets are clear; the delivery routes are not. Rooftop solar is one of the few measures that satisfies both constraints at once, because the capital is typically grant-funded through the Public Sector Decarbonisation Scheme and the savings land directly on the Trust's energy line.

A hospital's electrical profile is unusually well suited to PV. Theatres, imaging, ITU ventilation, and sterile services produce a high, flat baseload that runs through weekends and nights, so self-consumption is typically 95% or better. Rooftop arrays cover 8–25% of a Trust's annual electricity load depending on roof area and demand — meaningful at acute scale, where annual electricity spend frequently runs into millions.

What each estate type takes

Acute hospitals typically support 300 kW–2 MW of PV at £250,000–£1.6m, with paybacks around 7 years unsupported — and far faster where PSDS funds the capital. Multiple buildings on a single estate allow phased installation. Community hospitals and polyclinics take 100–500 kW at £90,000–£450,000; their daytime-heavy diagnostic and outpatient profile gives better self-consumption per installed kilowatt than their size suggests, and modern flat-roofed buildings make delivery faster. Mental health units run 100–400 kW at £90,000–£360,000 with strong 24/7 baseloads, plus the specific safeguards covered in the FAQs below. GP surgeries and health centres sit at 20–80 kW (£22,000–£90,000) and usually involve a landlord conversation with NHS Property Services or a LIFT company before anything else.

Governance, handled properly

Hospital solar projects do not fail on engineering. They fail in governance: a business case that does not survive Green Book scrutiny, a PFI energy clause nobody checked, an ICB approval that arrives after the funding window closed. Our delivery model is built around that reality. We write the PSDS application with auditable SBEM and PVSyst evidence as part of our fee. We produce the Full Business Case pack for Trust Board approval. We check PFI energy risk allocation before design spend. And we map the approval chain — Trust Board, Integrated Care Board, regional NHS England, PFI partner where relevant — into the project programme from day one, which is why our timelines on the process page are quoted in governance months rather than installer weeks.

HTM compliance and clinical continuity

Installation on a live hospital site follows HTM 03-01 infection control protocols: contractor induction by Estates and IPC teams, segregated construction zones, maintained negative-pressure areas where applicable. Electrical work follows HTM 06-01, with Authorising Engineer (Electrical) sign-off as standard. Every installer working in patient areas carries Enhanced DBS clearance, with Barred List checks for mental health and children's settings. Wards, theatres, and ITU continue normal operations throughout — the only operational touchpoint is the final grid connection, a 4–8 hour planned window agreed with Estates and theatre management.

The combined heat pump and PV route

PSDS Phase 4 actively rewards applications that pair heat pump electrification with solar PV. Heat pumps displace gas and oil heating; PV supplies the displaced electricity at near-zero marginal cost. Combined schemes typically sit in the £2–10m range per Trust site and are routinely 80–100% grant-funded. If your Trust's Green Plan includes heat decarbonisation — and under Greener NHS requirements it must — modelling PV alongside it is the highest-scoring application strategy available. The PSDS funding page covers application timing and evidence requirements in detail; costs and payback sets out the numbers behind each estate type.

NHS QUESTIONS

What estates teams ask us

Does our Trust need Trust Board approval for solar?

Almost always, yes — Trust Board approval is typically required for capital projects above £100,000, and most hospital solar schemes sit between £250,000 and £1.6m. We provide the business case pack the Board needs: NPV, IRR, simple payback, NHS Net Zero contribution, ERIC impact, and the PSDS funding pathway, with HMT Green Book treatment as standard.

How does solar affect our ERIC return?

Positively. ERIC (Estates Returns Information Collection) tracks energy use intensity in kWh/m² and CO2 emissions intensity, and solar reduces both. Generation is reported separately under the Greener NHS Green Plan annual return. Strong ERIC performance correlates with Trust Board confidence and CQC well-led judgements.

Our hospital is on a PFI contract — can we still install solar?

Yes, but the contract structure matters. If the PFI partner pays the energy bill, savings flow to them, so the economics depend on whether they co-invest or share savings with the Trust. Increasingly, PFI partners are co-investing under renegotiated VFM arrangements. We have worked through both structures.

Can a mental health trust use the same approach?

Yes — mental health units typically take 100–400 kW systems at £90,000–£360,000 with around 7-year paybacks. The differences are operational: anti-ligature design considerations, restricted contractor access, and installers with Enhanced DBS plus Barred List checks and Mental Health Act awareness. We deliver portfolio rollouts across mental health trust estates.

What size system does a typical acute hospital take?

Acute hospitals typically support 300 kW to 2 MW of rooftop PV — 550 to 3,700 panels across 1,800 to 12,000 square metres of roof. That generates 275,000 to 1.84 million kWh per year and saves 63 to 423 tonnes of CO2 annually. Multi-building estates can phase installation building by building.