Solar grants and funding for nhs trusts
NHS Trusts have access to substantial capital-grant routes through PSDS Phase 4, the wider Net Zero NHS programme, and Salix loan facilities. NHS estate operates 24/7 demand profiles that make solar economics exceptionally strong, and the cost-per-tonne metric works in NHS favour because hospital electricity demand is heavily concentrated in 24/7 plant load. Trust-level portfolio applications across acute, community, mental health, and ambulance estate consistently outperform single-site applications.
75–100% on bundles
Funding routes for nhs trusts
PSDS Phase 4
Primary route. NHS Trusts eligible directly. Bundled applications (solar + heat pumps + LED + BMS) score better than solar-only. Typical award 75–100% of qualifying capex on competitive applications. Multi-site portfolio applications across the Trust's estate (acute hospital + community hospitals + ambulance HQ + corporate offices) routinely outperform single-site bids.
Net Zero NHS programme
Cross-cutting NHS England decarbonisation framework — every Trust has Board-level commitments under the framework. PSDS applications align with Net Zero NHS targets and benefit from the strategic alignment in scoring.
Salix decarbonisation loans
Zero-interest loan facility complementing PSDS. Funds the non-grant portion of bundled projects, repaid through demonstrated energy savings. NHS Trust borrowing capacity governed by Trust development authority limits.
NHS Property Services capital programmes
For Trusts using NHSPS-managed estate, NHSPS operates dedicated decarbonisation capital programmes including solar deployment on the wider primary care and community estate.
Innovate UK NHS-specific competitions
Periodic Innovate UK calls for healthcare-specific energy innovation (e.g. resilient critical-load + battery storage at acute sites). 50–70% grant intensity on qualifying R&D components.
Worked example: 2.4 MWp across 8 sites (East Midlands Trust)
- Total capex: £1.92m across acute hospital + 3 community hospitals + 2 ambulance stations + corporate HQ + ops centre
- Bundled application: solar PV + air-source heat pumps on 3 community hospitals + LED relighting + BMS upgrades
- PSDS Phase 3 award: 75% (£1.44m) of qualifying capex
- Salix loan: 25% (£480k) at zero interest, 10-year term, repaid through demonstrated energy savings
- Year-one combined electricity saving: £478,000 across 8 sites
- Heat pump operations: additional ~£62,000/year fossil-fuel cost displacement
- Carbon savings: 1,180 tonnes CO₂ year one; 25,500 tonnes 25-year cumulative
- CO₂ cost-per-tonne: £294 — well below Phase 4 soft cap
Best application strategy
Strongest NHS Trust strategy is multi-site portfolio bundled applications: combine acute, community, ambulance, and corporate sites in a single PSDS bid. Pair solar with heat pump installations on sites where gas-fired heat dominates current emissions — this drives the cost-per-tonne metric well below the Phase 4 soft cap and routinely secures 75–100% grant cover. Include detailed half-hourly demand modelling per site to evidence self-consumption assumptions to assessors.
NHS Trusts grants FAQs
How much PSDS funding can an NHS Trust expect?
Can NHS Trusts use Capital Allowances on solar?
Are NHS Trusts eligible for Salix loans?
How do PPA arrangements work for NHS sites?
What about the Net Zero NHS framework — is solar required?
Solar grant funding options for NHS Trusts in 2025
NHS Trusts have access to a distinctive and relatively generous set of funding mechanisms for commercial solar and wider building decarbonisation. The NHS has its own net zero strategy (Greener NHS) with legally mandated targets, and this policy context means government funding has been more consistently available for NHS estates than many other public sector bodies.
Public Sector Decarbonisation Scheme (PSDS)
PSDS is the primary capital grant route for NHS solar. NHS Foundation Trusts, NHS Trusts, and NHS Property Services buildings all qualify. The scheme has run in multiple phases since 2020, with a total commitment of £1.425 billion through Phase 3e (2024–2025) and further phases expected through to 2028.
PSDS grant rates for NHS
Capital grants of 60–80% of eligible project costs. NHS Trusts with buildings rated EPC D or below, and those replacing gas heating with low-carbon alternatives, score highest and may attract 80%+ grant rates.
NHS applications vs other public sector
NHS Trusts benefit from dedicated NHSE (NHS England) decarbonisation support team who assist with PSDS applications. NHSE provides application guidance, project management support, and capital planning expertise specifically for NHS estates.
SALIX NHS-specific loan programme
Beyond PSDS grants, SALIX Finance offers 0% interest loans to NHS Trusts for energy efficiency and decarbonisation projects. These loans repay from energy savings and do not require Treasury approval below certain thresholds — making them significantly faster to access than normal NHS capital routes.
| NHS building type | Typical solar system | Project cost | PSDS grant (70%) | Annual saving |
|---|---|---|---|---|
| District General Hospital | 500kWp–2MWp | £425,000–1,600,000 | £297,500–1,120,000 | £100,000–380,000 |
| Community hospital | 100–300kWp | £85,000–260,000 | £59,500–182,000 | £24,000–62,000 |
| GP surgery / health centre | 25–100kWp | £22,000–85,000 | £15,400–59,500 | £6,000–20,000 |
| Mental health facility | 50–200kWp | £42,500–170,000 | £29,750–119,000 | £12,000–40,000 |
| NHS office / admin building | 50–150kWp | £42,500–127,500 | £29,750–89,250 | £12,000–35,000 |
Greener NHS net zero programme
NHS England published its Net Zero strategy in 2020, committing the NHS to net zero direct emissions by 2040 and net zero across the full value chain by 2045. This creates a structural long-term demand for low-carbon energy in NHS estates. Trusts are expected to develop and implement NHS Net Zero Building Standards, which include targets for on-site renewable energy generation and heat decarbonisation.
NHS Net Zero Building Standard
Solar PV is a core component of the NHS Net Zero Building Standard. New NHS buildings are expected to achieve a minimum renewable energy fraction through on-site generation. Retrofit of existing buildings is supported through PSDS and NHSE capital programmes.
Carbon Trust and CBRE specialist NHS support
The Carbon Trust and specialist NHS property advisers (CBRE, Cushman & Wakefield NHS division) offer technical advisory services specifically for NHS estates decarbonisation, including PSDS application support. Many Trusts use these services to develop the Decarbonisation Plan and project specifications required for competitive PSDS awards.
PPA route for NHS where PSDS is not available
NHS PPA considerations
NHS Trusts can contract PPAs as revenue expenditure, which may be faster to approve than capital projects requiring NHSE capital review. A PPA does not require PSDS grant, avoids capital approval processes, and delivers immediate energy cost savings.
NHS PPA procurement
PPAs for NHS must comply with public procurement rules (Procurement Act 2023). Use framework agreements (NHS Shared Business Services, Crown Commercial Service) or run a compliant mini-competition to access qualified PPA developers.
Mapping your eligibility for nhs trusts grants
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