The NHS estate in England covers approximately 6,300 properties — hospitals, community health centres, mental health facilities, and administrative buildings — most with large surface car parks that are ideal candidates for solar canopy installation. The combination of the Public Sector Decarbonisation Scheme (PSDS), the NHS’s legally binding net zero targets, and the financial pressure of rising energy costs has created a compelling window for NHS Trusts to invest in solar canopies at low or zero net cost.
The NHS Net Zero Obligation
The NHS in England is legally required to reach net zero for direct emissions (Scope 1 and 2) by 2040, and for its broader supply chain (Scope 3) by 2045, under the Health and Social Care Act 2022. NHSE’s Delivering a Net Zero NHS report identifies on-site renewable energy — including solar canopies over car parks — as a priority investment category.
For Chief Finance Officers and Estates Directors, the business case is straightforward: PSDS grants fund up to 100% of capital cost for some NHS categories; the energy savings reduce revenue budgets from year one; and the installation contributes directly to the Trust’s annual carbon reduction reporting under NHSE’s Sustainability Framework.
What PSDS Covers for NHS Trusts
The Public Sector Decarbonisation Scheme (Phase 4, 2025–2028) provides capital grants for heating decarbonisation, insulation, and renewable energy installations in public sector buildings. For solar canopies:
NHS Foundation Trusts — eligible for up to 70% capital grant on solar PV systems with a payback period under 10 years. Larger Acute Trusts with strong energy consumption evidence have achieved 70–100% grant cover by combining PSDS with NHS Charitable Funds or Salix interest-free loans.
NHS ICBs and ICS buildings — eligible on the same terms as Foundation Trusts.
Community Trusts and Mental Health Trusts — typically achieve higher grant percentages (80–100%) due to lower baseline energy consumption and smaller capital values, making the grant proportion a larger fraction of the project cost.
Ambulance Trusts — eligible; vehicle depot solar canopies with integrated EV fleet charging are particularly well-aligned with NHSE’s fleet decarbonisation requirements and typically attract the highest grant percentages.
NHS Property Services and Community Health Partnerships buildings — tenants in NHS PS or CHP buildings should approach NHSE and PSDS directly; the position on landlord-tenant solar installations has become more flexible in Phase 4.
The PSDS Application Process for Solar Canopies
Stage 1: Feasibility and Evidence Pack (Weeks 1–6)
Before submitting a PSDS Expression of Interest, you need a credible technical and financial case. The evidence pack should include:
- An energy consumption baseline (MPAN data for at least 12 months, with half-hourly profiles where available)
- A preliminary canopy design with system size (kWp) and annual generation estimate
- A simple payback calculation demonstrating the project meets PSDS’s viability criteria
- A site plan showing the canopy footprint and access routes
- Confirmation of Permitted Development status or planning consent route
We prepare the full feasibility pack for NHS clients as part of the pre-application stage, at no charge. The pack is designed specifically to meet PSDS’s evidence requirements.
Stage 2: Expression of Interest (EoI)
PSDS allocates grant funding via a competitive EoI process managed through the SALIX Finance online portal. The EoI requires:
- Organisation details and eligible building type
- Project description, system size, and capital cost estimate
- Carbon and energy saving projections
- Confirmation of match funding sources (if applicable)
EoI windows open periodically — typically once per quarter in Phase 4. Early submission is advantageous, as funding is allocated competitively.
Stage 3: Full Application and Technical Sign-Off
Successful EoIs are invited to submit a full application. This requires:
- Detailed technical specification from a qualified MCS installer
- Three-quote evidence (or justification for single-source procurement)
- CDM compliance documentation
- Structural calculations signed by a Chartered Structural Engineer
- Planning consent or PD confirmation
- Installer accreditations: MCS, NICEIC, and CDM Principal Designer/Contractor registration
Stage 4: Grant Agreement and Delivery
Once the grant agreement is signed, project delivery can commence. PSDS requires the project to be completed within the agreed timeframe (typically 12–24 months from grant agreement). Drawdown is in stages: typically 30% on contract signature, 40% on practical completion, 30% on MCS commissioning and monitoring setup.
Case Study: Acute Hospital, East Midlands (100% PSDS + Salix)
A 220-bed Acute Trust in the East Midlands had a 280-space patient and staff car park adjacent to the main hospital building. The Trust’s PSDS application for a 260 kWp double-cantilever canopy was submitted in Q3 2024.
Grant outcome: 70% PSDS capital grant (£168,000 on a £240,000 project). The remaining 30% was funded by an interest-free Salix loan, repaid in full from year-one energy savings. Net capital cost to the Trust: zero.
Technical outcome: 247,000 kWh annual generation; 72% self-consumption (daytime hospital loads — lighting, HVAC, medical equipment — sustain high self-consumption year-round). Energy savings: £59,280/year at 24p/kWh.
EV charging: 16 × 7.4 kW AC EV chargers installed under the canopy, funded separately via OZEV Workplace Charging Scheme (£5,600 contribution). Staff EV charging revenue: £9,400/year.
Programme: 26 weeks from PSDS grant agreement to MCS commissioning. The Trust’s Estates team had one named point of contact throughout.
Case Study: Mental Health Trust, North West (100% PSDS)
A Mental Health Foundation Trust in Greater Manchester had a 120-space car park serving a community-based facility. The Trust’s net zero estate plan identified the car park as a priority solar canopy site in 2025.
PSDS grant outcome: 100% capital grant (£145,000) — achievable for smaller community facilities with strong carbon reduction evidence and full project cost under £200,000.
Technical outcome: 140 kWp mono-pitch canopy; 133,000 kWh annual generation; 79% self-consumption. Energy savings: £31,920/year at 24p/kWh.
Programme: 19 weeks from PSDS EoI to commissioning. Planning was confirmed as Permitted Development by the local authority within 3 weeks.
Combining PSDS with Other NHS Funding
For larger NHS projects (500 kWp+), PSDS alone may not cover the full capital cost. The standard NHS canopy funding stack is:
- PSDS grant — typically 50–70% of eligible project cost
- Salix Finance interest-free loan — covers the remaining capital at zero interest cost, repaid from energy savings
- OZEV Workplace Charging Scheme — up to £14,000 per applicant for EV charger sockets
- NHS Charitable Funds — where the Trust has a charitable fund, trustees may approve a contribution to an energy project with clear patient benefit (e.g. reducing car park charges by passing on energy savings)
- Private Finance (deferred payment/PPA) — for Trusts with capital allocation constraints, a Power Purchase Agreement structure means zero upfront cost with energy savings from day one
What NHS Estates Teams Should Do Now
- Identify your top 3 canopy sites — car parks with 80+ spaces, high daytime occupancy, and no significant planning constraints are the strongest starting points
- Request a free feasibility study — we provide NHS estates with a PSDS-ready evidence pack at no charge, covering system design, financial case, PD confirmation, and DNO pre-enquiry
- Check current PSDS EoI window — Phase 4 EoI windows are competitive; early submission before the window fills is critical
- Engage SALIX early — even before PSDS confirmation, Salix can confirm loan eligibility and provide indicative terms, allowing you to present the full funding picture to your Finance Director and Board
To request a PSDS-ready feasibility study for your NHS estate, contact us here — we’ll prepare the full evidence pack and support your PSDS application at no charge.
Also see: PSDS Solar Canopy Guide | Hospital Car Parks | Solar Canopy Grants & Funding