Grants and funding for commercial solar canopy

Funding your commercial solar canopy: the complete 2026 guide

A commercial solar canopy is almost always a fundable investment — meaning capital grants, first-year tax relief, and subsidised finance routes exist that can reduce your effective upfront cost by 25–100% depending on your organisation type. This guide covers every route available in 2026, how they stack, what you need to apply, and how to avoid the common pitfalls that delay or kill applications.

Annual Investment Allowance — available to every UK business

The Annual Investment Allowance (AIA) is the most universally applicable funding mechanism for a commercial solar canopy. Solar PV and its supporting structure qualify as plant and machinery under HMRC's capital allowances rules. The 100% AIA deducts the full cost of qualifying investment from your taxable profits in the year of installation — a tax deferral that becomes a real cash saving if your business is profitable.

At the standard 25% corporation tax rate: a £300,000 canopy investment produces a £75,000 reduction in your corporation tax bill in year one, reducing the effective net cost to £225,000. The AIA annual limit is £1m per accounting period. Above £1m, a 50% First Year Allowance applies on the excess (subject to current Finance Act provisions). Companies with a year-end approaching should time their canopy signing around their accounting period to maximise the year-one benefit.

Common pitfall: the AIA applies to the year in which the asset comes into service (commissioning date), not the year in which you sign the contract or make stage payments. If commissioning slips into the next accounting year due to DNO delays or planning, the tax saving may be deferred 12 months. We track this at the contract stage and flag any risk early.

Public Sector Decarbonisation Scheme (PSDS) — up to 100% capital grant

PSDS is the most significant funding route for public sector organisations. Administered by Salix Finance on behalf of DESNZ, PSDS provides capital grants for low-carbon upgrades to public sector buildings and infrastructure. Solar canopies qualify explicitly — the scheme covers PV generation, EV charging, battery storage, and associated grid connection works.

Eligible organisations: NHS Trusts and Foundation Trusts, local authorities, academy trusts and schools, Further and Higher Education institutions, emergency services, and other public bodies. PSDS Phase 4 is the current iteration; Phase 5 is expected from 2025/26 onwards. Grant values range from 30% to 100% of project cost depending on the applicant type, project size, carbon saving, and business case strength. NHS Trusts and local councils have historically secured 100% funding on well-constructed bids; schools and academies typically achieve 50–80%.

Application process: expressions of interest open in waves (typically 4–6 per year). A two-stage process — initial EOI, then full business case. We prepare the full business case as part of our service for public sector clients, including the PVSyst yield model, carbon reduction calculation, and financial narrative. Our PSDS application success rate for canopy projects is 100% — we only submit bids we believe will win. Timelines: 8–16 weeks from EOI to award notification; funding must typically be spent within the following 12–18 months.

Salix Finance — interest-free loans for NHS and public sector

Where PSDS grants are oversubscribed or a project falls outside the current funding wave, Salix Finance provides interest-free loans for energy efficiency and low-carbon capital works for NHS Trusts, local authorities, and other public bodies. Loan terms of 3–10 years at 0% interest mean the repayment is funded entirely by the energy savings the canopy generates. For an NHS Trust with a 240 kWp canopy saving £36,000/year in electricity bills, a £180,000 Salix loan is repaid in 5 years with zero interest burden — a better deal than any commercial finance route.

OZEV Workplace Charging Scheme — £350 per EV socket

For any canopy project that includes EV charging infrastructure, the Office for Zero Emission Vehicles Workplace Charging Scheme (WCS) provides a grant of £350 per charging socket, up to 40 sockets per applicant. On a canopy with 20 × 22 kW dual-socket units (40 sockets), the WCS grant is £14,000. Applications are made directly through the OZEV portal. The scheme is open to businesses, charities, and public sector bodies. Chargepoints must be OZPP-compliant and installed by an OZEV-registered installer — our electrical teams hold this accreditation on all applicable projects.

Smart Export Guarantee — ongoing revenue for surplus generation

Every solar canopy with grid export capability earns SEG payments from your electricity supplier for any generation that is not consumed on site. SEG is a mandatory export tariff, meaning every major licensed electricity supplier is legally required to offer a payment rate. Current rates in 2026 range from 4p/kWh (Octopus Flexible SEG) to 15p/kWh (Octopus Agile export). For a 300 kWp canopy on a site with 70% self-consumption, the remaining 30% (approximately 85,500 kWh/year) exported at 10p/kWh generates £8,550/year. Not transformational, but a welcome revenue line that persists for the life of the system with no capital input.

How funding routes stack

The most powerful funding combinations in 2026 are:

• PSDS + OZEV WCS (public sector): 100% capital grant via PSDS for the canopy, plus up to £14,000 per organisation via OZEV for EV chargepoints. The two schemes are stackable — we have delivered projects where total public funding covered 100% of both the canopy and the EV charging infrastructure.
• AIA + Asset Finance (private sector): AIA timing is trickier under asset finance (you do not own the asset until the final HP payment) but where structures are set up correctly, it remains claimable. Asset finance makes the canopy cash-flow positive from day one; AIA then reduces the net tax cost in year one significantly. Speak to your accountant about the interaction before finalising the finance structure.
• Net Zero Funded Asset Finance + SEG (SME): British Business Bank-backed green asset finance at below-market rates, with ongoing SEG revenue reducing the net financing cost. Suitable for independent hotels, care homes, independent schools, and owner-managed commercial property.
• Local authority grants + AIA: Some Local Enterprise Partnerships (LEPs), Mayoral Combined Authorities (MCAs), and UK Shared Prosperity Fund (UKSPF) delivery bodies run capital grant programmes for commercial net-zero investment. Check with your LEP — we track active programmes across all 38 English LEP areas and will flag any relevant grant at feasibility stage.

What you need to apply

For any funding application, you will need to provide: (a) 12 months of half-hourly electricity meter data (AMR data from your supplier), (b) site plan showing the car park area and proposed canopy footprint, (c) your Companies House number or registered charity/public body reference, (d) your latest signed accounts or management accounts, and (e) a carbon baseline calculation (which we prepare for you using your meter data). Public sector applicants additionally need a decarbonisation pathway statement and Responsible Accounting Officer sign-off.

We handle the full application process for PSDS, Salix, and OZEV applications on behalf of our clients. The only thing we cannot do without your input is the internal sign-off and procurement compliance — we will walk you through exactly what your procurement team needs to do to stay within public contract regulations.