Solar Panels for Manufacturing & Industrial UK (2026)
Quick Answer
Solar for UK manufacturing & industrial typically costs £80,000–£800,000+ for a 100 kW – 1 MW+ system, saving £15,000–£150,000+/year and paying back in 4–7 years. Solar PV qualifies for the Annual Investment Allowance (100% first-year tax relief up to £1M).
Costs verified April 2026 for UK commercial market. Site-specific quotes vary materially.
UK manufacturing & industrial increasingly install solar to cut what is usually the second or third largest operating cost: electricity. This guide covers system sizes that suit the sector, realistic payback, tax treatment, and the specific considerations that make solar work (or not) for manufacturing & industrial.
| Typical system size | 100 kW – 1 MW+ |
| Installed cost | £80,000–£800,000+ |
| Annual savings | £15,000–£150,000+ |
| Payback period | 4–7 years |
| Tax relief | Annual Investment Allowance (100% up to £1M) |
Why Solar Works for Manufacturing & Industrial
Manufacturing sites typically run 6am–6pm or 24/7 shift patterns with heavy daytime electrical load — motors, compressors, HVAC, lighting. Self-consumption ratios are among the highest of any commercial sector (often 85–95%), making export tariffs less critical than for other verticals.
- Large unshaded flat or shallow-pitch roofs are the ideal solar substrate
- Shift-based operations give near-perfect daytime load matching
- Electricity is a major cost centre — often 5–15% of operating costs
- Annual Investment Allowance covers 100% of up to £1M expenditure in year one
- Carbon Reduction Commitment and supply chain pressure (especially automotive, aerospace, FMCG) increasingly demand Scope 2 reductions
Sector-Specific Considerations
- Structural roof survey essential — many older industrial buildings need strengthening before PV load can be added
- Three-phase supply standard; larger systems always require G99 DNO approval
- Half-hourly metering contracts: higher electricity prices make solar ROI stronger than quoted grid unit rate suggests
- Export limits are common — check local network capacity before sizing
- DNO network upgrade contributions possible for MW-scale systems
- Consider EV charging infrastructure for fleet vehicles and staff — powered by solar
Typical System Sizing
Most manufacturing & industrial installations fall in the 100 kW – 1 MW+ range. For detailed cost, output and payback data at your target size, see our 50KW solar system cost guide.
Commercial solar in the UK generally costs £800–£1,000 per kW installed at the smaller end (sub-50kW) and £600–£800 per kW at industrial scale (250kW+). Site complexity — roof condition, access, switchgear upgrades, DNO constraints — drives variation more than panel or inverter brand.
Tax Treatment & Finance
- Annual Investment Allowance (AIA): 100% first-year tax relief on qualifying capital expenditure up to £1 million per year. Solar PV qualifies.
- VAT: commercial solar is not zero-rated (unlike residential). Standard 20% VAT applies and is reclaimable for VAT-registered businesses.
- Capital allowances beyond AIA: 50% first-year allowance on solar for limited companies exceeding the £1M AIA cap.
- PPA / rooftop lease: available as an alternative to outright purchase — a third party owns and maintains the system; you pay a below-grid rate for the electricity generated.
- Asset finance: widely available; typical structures deliver positive cashflow from month one.
DNO Approval
Most commercial installations above 11.04kW on three-phase supply (or 3.68kW per phase on single-phase) require a G99 DNO pre-approval. Timelines are typically 6–9 weeks. See our DNO application guide for full detail.
Frequently Asked Questions
How much does commercial solar cost for a factory?
A typical industrial rooftop install costs £800–£1,000 per kW installed. A 100kW system costs around £80,000; 500kW costs around £400,000–£500,000. Cost per kW falls at scale.
What is the payback period for factory solar?
4–7 years is typical for UK manufacturing, faster than most commercial verticals thanks to high daytime self-consumption. With capital allowances, the effective post-tax payback can be under 4 years.
Do I need planning permission for industrial solar?
Most rooftop solar on industrial premises falls under permitted development. Ground-mounted arrays, systems on listed buildings, or arrays larger than 1MW may require full planning.
Can we finance solar instead of buying outright?
Yes. Asset finance, lease-purchase, and Power Purchase Agreements (PPA) are widely available for industrial solar. Asset finance typically delivers positive cashflow from month one while preserving capital.
Other Commercial Sectors
| Sector | Typical size | Payback | |
|---|---|---|---|
| Hotels & Resorts | 30–100 kW | 5–7 yrs | View → |
| Medical Centres & Surgeries | 10–50 kW | 6–8 yrs | View → |
| Pubs, Restaurants & Hospitality | 10–40 kW | 5–7 yrs | View → |
| Farms & Agriculture | 30–250 kW | 5–7 yrs | View → |
Get a Quote for Your Manufacturing & Industrial
Commercial solar pricing varies significantly with site conditions. The most reliable benchmark is two or three quotes from MCS-certified installers with commercial experience. Use the form below to receive proposals from installers who work on manufacturing & industrial in your region.
See also: Commercial solar overview · Solar for farms · Best Octopus tariffs for solar
Sources
John Rooney is the founder of Solar Info and has been covering the UK solar energy market since 2023. He fact-checks all content against official MCS and Ofgem data and maintains relationships with MCS-certified installers across the UK.