Sector guide · Updated 12 May 2026

Solar panel grants for factories & manufacturers

UK manufacturers are the largest single beneficiary of commercial solar grants in 2026 — and the most under-served. Energy-intensive industries from food and drink processing to chemicals, paper mills, automotive assembly and heavy engineering qualify for the Industrial Energy Transformation Fund, the largest UK capital grant programme for industrial decarbonisation. Combined with 100% Full Expensing on the system capex and SEG income on the export, a typical 500kWp factory rooftop can recover 40-60% of capex in the first 18 months of operation.

Last reviewed 12 May 2026 3 min read By Donovan Fawcett Sector guides

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Sector snapshot

Typical buyer	Operations Director / Energy Manager
Typical system size	150 kWp – 1.5 MWp typical
Typical project value	£120,000 – £1,200,000
Annual electricity demand	300,000 – 4,000,000 kWh

Why factories & manufacturers are buying solar in 2026

High and predictable daytime load

Factory production runs typically match solar generation hours — particularly food processing, plastics, automotive and engineering. Self-consumption rates of 75-90% are achievable on most factory rooftops.

Large unshaded roof area

Modern industrial portal-frame buildings provide 800-3,000 m² of unshaded rooftop area. Most can accommodate 200-1,500 kWp of solar PV without structural strengthening.

Roof refurbishment cycle

Many UK factories are at the 20-30 year roof refurbishment point — making integrated solar-plus-roof economically compelling. Re-roof + solar typically beats re-roof alone in cost per m² when amortised over 25 years.

Climate Change Levy exposure

Manufacturers on CCL main rates pay an additional ~0.6p/kWh on imported grid electricity. Self-consumed solar avoids the CCL entirely — adding £6,000+ per year of additional saving on a 100,000 kWh self-consumption profile.

Carbon disclosure pressures

Tier 1 supply chains (automotive, retail, pharma) require Scope 2 reporting and increasingly Scope 3 — making credible on-site renewable generation a contract retention factor, not just a cost saving.

The primary grant stack for this sector

These are the schemes most likely to apply to a typical project in this sector. Click through for full eligibility, application process and worked examples.

Capital grant

Industrial Energy Transformation Fund for solar PV

Amount: 30-50% of project capex (typically £100k-£14m awards)

IETF 2026 guide — match-funded grants of 30-50% for energy-intensive industry in England, Wales, NI. Eligible sectors, application windows, solar PV examples....

Tax relief

Full Expensing for business solar PV

Amount: 100% first-year deduction — no upper limit

Full Expensing 2026 — UK limited companies can deduct 100% of commercial solar capex from corporation tax with no cap. Eligibility, examples, comparison vs AIA....

Tax relief

Annual Investment Allowance for business solar

Amount: Up to £1 million per year, 100% first-year deduction

AIA 2026 guide — how UK businesses claim 100% first-year tax relief on commercial solar PV up to £1m. Eligibility, calculation worked examples, group cap rules....

Income scheme

Smart Export Guarantee for businesses

Amount: 3p–15p per kWh exported (2026 fixed tariffs)

Smart Export Guarantee 2026 guide for UK businesses — best export tariffs, eligibility for 50kWp+ systems, how to register, and how to combine SEG with AIA / Fu...

Plus secondary options:

Regional growth hub grants for business solar

£1,000 – £25,000 typical (match-funded, usually 40-60%)

Business Energy Advice Service for West Midlands SMEs

Up to £100,000 capital grants (match-funded)

REGO sales — selling renewable origin certificates from your solar

0.5p – 2p per kWh of renewable generation (REGO market price)

Sub-sector breakdown

Different parts of this sector have different load profiles, building types and grant eligibility.

Food & drink manufacturing — Largest IETF beneficiary sector. Refrigeration load matches solar profile perfectly. Bakeries, breweries, dairies, fresh produce packers all suited.
Automotive assembly & components — Three-phase G99 connections often constrain export — pair with battery storage. Tier 1 supplier ESG mandates drive faster approvals.
Plastics & rubber processing — Extruders, injection moulders run high heat process load — combine PV with process electrification IETF case.
Pulp, paper & board — Often qualifies for Energy Intensive Industry Compensation. PSDS-style grant routes more constrained.
Chemicals & pharmaceuticals — High Cleanroom and process load. Tier 1 ESG disclosure typically the strongest single driver.
Aerospace & precision engineering — Often large clean-floor footprint with high daytime electrical demand. Roof access can be a constraint.
Glass, ceramics, cement — Energy-intensive — IETF candidate. Roof condition often a constraint on older sites.
Metals & foundries — Heavy daytime load. IETF strong; battery integration valuable for managing peak charges.
Heavy engineering, fabrication — Variable load profile; battery integration often economic. SEG export valuable in low-load months.
Textiles, clothing, leather — Lower energy intensity per m² — AIA-led stack typically wins over IETF.

Sector case study

Case study — Mid-size automotive component manufacturer, Coventry, 720kWp installed 2025.

The site occupies a 12,000 m² portal-frame manufacturing unit on the Coventry north industrial corridor. Annual baseline electricity import: 2.1 GWh; annual gas: 1.4 GWh; carbon footprint Scope 1+2 approximately 740 tCO2e. A Tier 1 customer (German OEM) updated its 2024 supplier code requiring Scope 1+2 emissions disclosure and a credible decarbonisation roadmap by end-2025.

The project delivered 720 kWp of rooftop PV (1,680 panels), 480 kWh of battery storage, and replaced compressed air with VSD compressors and an ammonia chiller upgrade. Capex: £720,000 total; IETF grant: £210,000; net cost £510,000. First-year Full Expensing tax relief: £127,500. Effective net cost after tax: £382,500. Annual savings (year one): £138,000 in electricity import avoided + £6,400 SEG + £8,200 REGO sales. Payback: 2.8 years.

The Tier 1 audit completed in Q2 2026 with no findings. The contract — worth £8m annually — was retained.

Sector-specific watch-outs

G99 export limits. Many DNOs impose a 50-100 kW export cap on rural factory sites — exceeding this needs a major network upgrade. Always check DNO capacity early.
Roof structural assessment. Older portal-frame buildings may need structural surveying before installing >250 kWp. Budget £2,500-£8,000 for a Cat 2 structural assessment.
Process electrification dependencies. Many manufacturers can extract more value by combining PV with process electrification — but the engineering case takes 12-18 months to develop.
Climate Change Agreement (CCA) interaction. Some IETF projects can affect your CCA energy use baseline — get specialist advice.
Fire risk classifications. Industrial rooftop solar requires ESS Class IV fire risk classification on lithium battery installations. Material insurance premium impact possible.

Donovan Fawcett · Director, SEO Dons Ltd Twelve years in UK commercial solar SEO and grant advisory. Editorial policy & independence.

FAQs

Solar panel grants for factories & manufacturers · FAQs

What is the typical capex for solar on a 5,000 m² UK factory?

A 5,000 m² industrial roof typically accommodates 350-500 kWp of solar PV. At 2026 prices, expect £280,000-£420,000 installed (excluding battery storage). After 100% Full Expensing tax relief, net cost is around £210,000-£315,000 for a limited company at the 25% corporation tax rate.

Which IETF stream applies to factories?

The IETF supports manufacturing sites with Climate Change Levy main-rate liability across food, drink, chemicals, paper, metals, glass, ceramics and similar sectors. Energy efficiency & decarbonisation projects with material savings (typically 100,000+ kWh/year or 50+ tCO2e/year) score well. Full IETF guide.

Can a factory claim AIA on top of IETF?

Yes — the AIA / Full Expensing tax relief applies to your post-grant capex. If IETF funds 40% of a £500k project, you can claim AIA / FYA on the remaining £300k. Effective tax relief at 25% main CT rate: £75,000 — bringing the net cost to £225,000.

How does solar affect Climate Change Agreement targets?

Self-consumed solar reduces your imported electricity, which directly improves your CCA energy ratio. Exported solar does not count towards your CCA — so size the system for high self-consumption to maximise CCA benefit.

What is the SEG income for a 500kWp factory system?

At a typical 25% export rate (after high daytime self-consumption) and a 5p/kWh SEG tariff, a 500 kWp system exports approximately 125,000 kWh/year and earns about £6,250/year of SEG income. Best fixed rates in 2026 can lift this above £10,000/year.

Check if your business qualifies for these schemes

Free 60-second eligibility check tells you exactly which grants and tax reliefs apply to your business in the factories & manufacturers sector.

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