Commercial Solar Panels in the UK
Commercial solar panels let UK businesses install systems from 10 kWp up to 1 MWp, cut energy bills by 30-50%, and claim 100% tax relief through the Annual Investment Allowance (AIA). This guide compares commercial solar costs, panels, and ROI, and shows you how to choose a commercial solar installer.
With electricity prices remaining high, commercial solar panels deliver a typical payback of 5-7 years and a 10-15% annual ROI. Whether you run a small office, a warehouse, a factory or a farm, we list MCS-certified commercial solar companies and installers in every UK county so you can compare quotes and find the right one for your project.
Last updated June 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
Quick Answer
Commercial solar panels in the UK cost £12,000-£210,000 depending on system size, with 100% tax relief available through the Annual Investment Allowance (AIA). A typical 50 kWp business system costs £34,000-£47,000, saves £10,000-£15,000/year on electricity, and pays for itself in 5-7 years with a 10-15% annual ROI.
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Solar by Sector
Commercial solar works differently depending on your sector’s load profile, roof availability, and tax treatment. Pick a vertical below for sector-specific system sizes, ROI, and considerations.
Hotels & Resorts
30-100 kW · 5-7 yr payback. Summer peak demand matches solar generation.
Medical Centres & Surgeries
10-50 kW · 6-8 yr payback. NHS Net Zero and private practice ESG.
Manufacturing & Industrial
100 kW-1 MW+ · 4-7 yr payback. Best self-consumption ratios.
Pubs, Restaurants & Hospitality
10-40 kW · 5-7 yr payback. Battery especially valuable for evening service.
Warehouses & Logistics
50 kW-1 MW+ · 4-7 yr payback. Vast flat roofs are the ideal solar substrate.
Offices
15-100 kW · 6-8 yr payback. A 9-5 load profile that matches generation.
Retail & Shops
15-250 kW · 5-7 yr payback. Refrigeration and long hours drive fast payback.
Schools & Education
20-250 kW · 6-9 yr payback. PSDS grant funding and term-time load.
Churches & Places of Worship
4-30 kW · 7-10 yr payback. Faculty permission and listed-building care.
Community & Village Halls
6-40 kW · 6-9 yr payback. Community energy grants and daytime hire load.
Farms & Agriculture
30-250 kW · 5-7 yr payback. Dedicated farm solar guide with grants.
What are commercial solar panels?
Commercial solar panels are larger-scale photovoltaic systems designed for businesses, farms, schools, community buildings, and public sector organisations. Where residential solar panels are typically 3-6 kWp (8-14 panels), commercial solar panels range from 10 kWp to 1,000 kWp (1 MWp), covering significantly more roof or ground space and generating far more electricity.
The technology behind commercial solar panels is the same as residential: photovoltaic cells convert sunlight into DC electricity, an inverter converts it to AC, and the business uses it on-site. Surplus can be exported to the grid for income. The key difference is scale: a 50 kWp commercial solar panel system on a warehouse roof generates approximately 43,000-48,000 kWh per year, enough to offset a significant portion of a UK business’s electricity consumption.
UK commercial rooftop solar is now well established, with installations on warehouses, distribution centres, factories, hotels, schools and farms across every county. You can browse hundreds of named UK commercial solar sites, including large rooftops and ground-mount arrays, on our interactive UK solar map.
Commercial solar panels in the UK use the same Tier-1 silicon modules found on homes (Aiko, JA Solar, Jinko, LONGi, REC, Trina), but in larger formats, commonly 550-620 Wp bifacial panels with 25-year linear performance warranties. Inverters scale to match, with three-phase string inverters or central inverters for systems above 100 kWp.
Small Business
10-30 kWp systems for offices, shops, and small workshops. 25-70 panels on an existing roof.
Medium Business
30-200 kWp for warehouses, factories, hotels, and large retail. Flat roofs are ideal for ballasted mounting.
Large / Agricultural
200-1,000 kWp for large farms, data centres, and industrial sites. May include ground-mounted arrays. See our farm solar guide for Farming Equipment and Technology Fund (FETF) grants and farm-specific sizing.
Best commercial solar panels in the UK (2026)
The best commercial solar panels for UK businesses combine a high power rating (550-620 Wp), a strong 25-year linear performance warranty, and Tier-1 manufacturer backing. Below is a comparison of the most commonly installed commercial solar panels on UK warehouse, factory, and farm roofs in 2026.
| Panel | Typical Wp | Efficiency | Year-25 Output Warranty | Best For |
|---|---|---|---|---|
| Aiko Comet | 500-650 Wp | ~23.3% | 88.85% | Premium offices, shading-prone roofs |
| JA Solar DeepBlue | 580-620 Wp | ~22.5% | 87.4% | Warehouses, large flat roofs |
| Jinko Tiger Neo | 580-620 Wp | ~22.6% | 87.4% | Industrial sites, ground-mount |
| LONGi Hi-MO 7 | 570-590 Wp | ~22.3% | 87.4% | Manufacturing, schools |
| DMEGC Infinity | 440-480 Wp | ~22.2% | 87.4% | Value commercial, retail parks |
| Trina Vertex S+ | 440-505 Wp | ~22.5% | 87.4% | Mixed-use, small commercial |
Sources: Aiko, JA Solar, Jinko, LONGi, DMEGC, Trina manufacturer datasheets, 2026. Output warranty figures are the guaranteed minimum performance at year 25 of a linear degradation curve. Higher Wp panels reduce the panel count and balance-of-system cost for the same kWp.
What tax relief is available for commercial solar?
UK businesses can claim significant tax relief on commercial solar PV installations. The Annual Investment Allowance (AIA) allows 100% of the cost to be deducted from taxable profits in the year of purchase, up to £1,000,000. This effectively reduces the net cost by your marginal corporation tax rate.
| Tax Relief | Benefit | Details |
|---|---|---|
| Annual Investment Allowance (AIA) | 100% first-year deduction | Up to £1,000,000 per year on qualifying plant & machinery |
| Enhanced Capital Allowances | 100% first-year deduction | Available for energy-saving technologies including solar PV |
| Corporation tax saving | 25% of system cost | At the main 25% corporation tax rate |
| VAT recovery | 20% of system cost | VAT-registered businesses can reclaim the 20% VAT |
| Smart Export Guarantee (SEG) | Export income | Earn 3-30p/kWh for surplus electricity exported to the grid |
Who can claim tax relief?
- Businesses and commercial operations
- Agricultural operations and farms
- Public sector bodies
- Schools and community buildings
- Non-profit organisations
Solar PV qualifies as plant and machinery for capital allowance purposes. Speak with your accountant to confirm eligibility for AIA or Enhanced Capital Allowances.
MCS certification
To qualify for the Smart Export Guarantee (SEG) and ensure compliance, your installation must be carried out by an MCS-certified installer. MCS certification is also often required for finance and insurance purposes.
How much do commercial solar panels cost in the UK?
Commercial solar panels in the UK cost £750-£1,000 per kWp installed, or £15,000 to £340,000 depending on system size. A 50 kWp system costs £34,000-£47,000 before tax relief, and significantly less after AIA deductions. Larger systems benefit from lower costs per kWp due to economies of scale.
| System Size | Gross Cost (est.) | AIA Tax Relief (25%) | Effective Cost (est.) | Annual Generation |
|---|---|---|---|---|
| 20 kWp | £15,000-£20,000 | £3,750-£5,000 | £11,250-£15,000 | ~19,000 kWh |
| 50 kWp | £34,000-£47,000 | £8,500-£11,750 | £25,500-£35,250 | ~47,500 kWh |
| 100 kWp | £60,000-£85,000 | £15,000-£21,250 | £45,000-£63,750 | ~95,000 kWh |
| 200 kWp | £110,000-£153,000 | £27,500-£38,250 | £82,500-£114,750 | ~190,000 kWh |
| 500 kWp | £255,000-£340,000 | £63,750-£85,000 | £191,250-£255,000 | ~475,000 kWh |
Costs are estimates based on UK market rates in 2026. Actual costs vary by installer, roof type, and project complexity. VAT at 20% applies to commercial installations (reclaimable for VAT-registered businesses). Generation estimates assume average UK solar yield of 950 kWh/kWp.
What is the ROI on commercial solar in the UK?
Commercial solar in the UK delivers a typical annual ROI of 10-15% with a payback period of 5-7 years. A system can reduce electricity bills by 30-50%, and surplus electricity earns 3-30p/kWh through the Smart Export Guarantee (SEG). Businesses with high daytime electricity use see the best returns.
| Metric | Typical Range |
|---|---|
| Payback period | 5-7 years |
| Annual ROI | 10-15% |
| System lifespan | 25-30 years |
| Electricity cost savings | 30-50% of electricity bill |
| Export income (surplus) | 3-30p/kWh (Smart Export Guarantee) |
| Carbon reduction | ~0.3 tonnes CO2 per MWh generated |
Tax benefits
Commercial solar qualifies for the Annual Investment Allowance (AIA) and Enhanced Capital Allowances, allowing businesses to write off 100% of the cost against corporation tax in the first year. Combined with VAT recovery, the effective cost is significantly reduced.
Battery storage
Battery storage systems can be paired with commercial solar to store excess generation for use during peak-rate hours. This increases self-consumption and reduces reliance on grid electricity, further improving ROI. Battery costs also qualify for capital allowances.
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Get a Quote ↓What size solar system does my business need?
Most UK businesses install commercial solar systems between 20 and 200 kWp. A small office or shop typically needs 10-20 kWp (25-50 panels), a warehouse or factory needs 50-200 kWp, and large industrial sites can go up to 1,000 kWp. System size depends on electricity consumption, roof area, and budget.
| Business Type | Typical System | Panels | Roof Area |
|---|---|---|---|
| Small office / shop | 10-20 kWp | 25-50 | 50-100 m² |
| Restaurant / hotel | 20-50 kWp | 50-125 | 100-250 m² |
| Warehouse / factory | 50-200 kWp | 125-500 | 250-1,000 m² |
| Farm (dairy / tillage) | 30-100 kWp | 75-250 | 150-500 m² |
| School / community | 20-50 kWp | 50-125 | 100-250 m² |
| Large industrial / data centre | 200-1,000 kWp | 500-2,500 | 1,000-5,000 m² |
Rule of thumb: 1 kWp requires approximately 4-5 m² of roof space and generates ~950 kWh/year in the UK.
Do commercial solar panels need planning permission?
Roof-mounted commercial solar panels in the UK are generally permitted development for non-domestic buildings, provided panels do not protrude more than 200mm from the roof surface and do not extend above the ridgeline. Ground-mounted systems and installations on listed buildings always require planning permission.
| Installation Type | Planning Required? | Conditions |
|---|---|---|
| Roof-mounted (industrial) | Permitted development | Must not protrude more than 200mm from roof or extend above ridgeline |
| Roof-mounted (business park) | Permitted development | Same conditions as industrial |
| Ground-mounted | Yes, typically required | Some agricultural exemptions for small arrays |
| Listed buildings | Yes, always required | Listed building consent also needed |
Large systems
If your system falls outside permitted development rights, your installer should handle the planning application as part of the project. Commercial planning applications typically take 8-12 weeks. Check with your local planning authority for specific requirements in your area.
How to find a commercial solar installer in the UK
Not every solar company can take on commercial work. Most MCS-certified solar installers handle residential systems up to 20 kWp, whereas commercial solar panel installations above 50 kWp need a specialist commercial solar installer with three-phase G99 experience, structural roof survey capability, and a portfolio of completed business projects. When you compare commercial solar companies, use the checklist below before requesting quotes.
MCS certification
Required for the Smart Export Guarantee and most commercial insurance. Verify the MCS number on the MCS register.
G99 / DNO experience
Commercial solar panel systems above 16 A per phase need a G99 connection agreement. Ask how many G99 jobs the installer has commissioned in the last 12 months.
Structural roof survey
Industrial roofs vary in load capacity. A competent installer will commission a structural engineer's report before quoting; cheap quotes that skip this step are a red flag.
Commercial portfolio
Ask for case studies of completed systems at or above your target kWp, with named clients and references. Generation data from the last 12 months matters more than glossy brochures.
In-house electrical team
Commercial jobs often involve switchgear upgrades, new half-hour metering, and CT clamps. NICEIC or NAPIT-registered electricians in-house reduce sub-contractor risk.
Insurance and bond
Public liability of at least £5m and a workmanship warranty backed by an insurance-backed guarantee (IBG) are the minimum for commercial projects.
Types of commercial solar companies in the UK
UK commercial solar companies fall into three broad types. The right one depends on your system size, budget, and whether you want to fund the project yourself or pay nothing upfront.
| Type of company | Best for | How it works |
|---|---|---|
| Local MCS-certified installer | 10-250 kWp owner-funded systems | Regional commercial solar installers who survey, install, and commission. Usually the lowest cost per kWp and the easiest to hold accountable. |
| National solar EPC contractor | 250 kWp-1 MWp+ industrial projects | Larger commercial solar companies handling engineering, procurement, and construction for multi-site or high-load businesses. Higher overhead, broader capability. |
| PPA / funded solar provider | Zero-upfront installs | The provider funds and owns the system; you buy the electricity it generates at a fixed rate below grid prices through a Power Purchase Agreement (PPA). |
For most UK businesses installing 20-250 kWp, a local MCS-certified commercial solar installer offers the best value and accountability. Compare at least three commercial solar companies on price per kWp, commercial portfolio, and warranty before you commit.
Find commercial solar installers near you
Solar Info UK lists every MCS-certified commercial solar installer and company in the UK by county. Filter by your county to find commercial solar installers near you and contact them directly, or request a free quote to be matched with three shortlisted commercial solar companies in your area.
How do you get commercial solar installed?
To get commercial solar installed: choose an MCS-certified installer, arrange a site survey, apply to your DNO (Distribution Network Operator) for grid connection under G98/G99, then proceed with installation. The full process takes 2-4 months from first enquiry to generating electricity.
Choose an MCS-certified commercial installer
Select a company from the MCS certified installer register at mcscertified.com. Get at least 2-3 quotes. The installer will conduct a site survey, review your electricity bills, and recommend a system size.
DNO application (G98/G99)
Your installer applies to your DNO (Distribution Network Operator) for grid connection approval. Systems up to 16A per phase use the simpler G98 notification; larger systems require a G99 application which takes 4-10 weeks.
Installation
Once DNO approval is received, installation proceeds. A 50 kWp system typically takes 3-5 days. Larger systems may take 1-3 weeks.
Commissioning and MCS certificate
Your installer commissions the system, installs monitoring, and issues your MCS certificate. This certificate is required to register for the Smart Export Guarantee (SEG).
Register for Smart Export Guarantee
Sign up with a SEG-licensed energy supplier to receive payment for surplus electricity exported to the grid. Your MCS certificate is required for registration.
Important: use an MCS-certified installer
Only installations by MCS-certified installers qualify for the Smart Export Guarantee. MCS certification also provides consumer protection and is often required by insurers and lenders.
Commercial Solar Panels FAQ
How much can a business save with solar panels in the UK?
A typical commercial solar installation saves 30-50% on electricity bills. A 50 kWp system generating ~47,500 kWh/year can save £10,000-£15,000 annually at current commercial electricity rates (28p/kWh+). Additional income comes from exporting surplus at 3-30p/kWh through the Smart Export Guarantee (SEG).
What tax relief is available for commercial solar in the UK?
UK businesses can claim 100% tax relief on solar PV through the Annual Investment Allowance (AIA), up to £1,000,000 per year. Enhanced Capital Allowances are also available for energy-saving technologies. At the 25% corporation tax rate, this effectively reduces the system cost by 25%. Farms may also access the Farming Equipment and Technology Fund (FETF), see our dedicated farm solar guide for full details.
Is there VAT on commercial solar panels in the UK?
Yes, commercial solar installations are subject to 20% VAT (residential installations qualify for 0% VAT). However, VAT-registered businesses can reclaim the VAT through their normal VAT returns, making it effectively cost-neutral.
Can I install solar on a leased building?
Yes, but you need written consent from your landlord. The business occupying the building and benefiting from the electricity generation typically arranges the installation. Ensure the lease terms cover the expected lifespan of the system.
How do I choose a commercial solar company in the UK?
Compare at least three commercial solar companies on price per kWp, completed commercial portfolio, MCS certification, G99/DNO experience, and warranty. For systems of 20-250 kWp, a local MCS-certified commercial solar installer usually offers the best value; for 250 kWp and above, a national EPC contractor or a PPA-funded provider may suit better. Solar Info UK lists MCS-certified commercial solar installers in every county so you can shortlist and compare quotes.
How long does a commercial solar installation take in the UK?
The installation itself takes 3-5 days for a typical 50 kWp system, or 1-3 weeks for larger systems. The full process, from initial enquiry to generating electricity, takes 2-4 months including DNO (Distribution Network Operator) grid connection approval under G98/G99.
Do commercial solar panels work on flat roofs?
Yes. Flat roofs are actually ideal for commercial solar. Panels are mounted on ballasted frames at an optimal angle (30-35 degrees) without needing to drill into the roof membrane. This is the most common setup for warehouses, factories, and retail buildings in the UK.
What is the Annual Investment Allowance for solar?
The Annual Investment Allowance (AIA) allows businesses to deduct 100% of the cost of qualifying plant and machinery, including solar PV, from taxable profits in the year of purchase, up to £1,000,000. This significantly improves the first-year ROI compared to claiming capital allowances over multiple years.
Can I sell excess electricity from commercial solar?
Yes. Under the Smart Export Guarantee (SEG), businesses can sell surplus electricity to the grid at approximately 3-30p/kWh depending on your energy supplier and tariff. You need a smart meter, an MCS-certified installation, and a grid connection via your DNO. However, maximising self-consumption gives the best financial return.
How much do commercial solar panels cost?
Commercial solar panel systems typically cost £750-£1,000 per kWp installed. A 50kWp system for a medium business costs £34,000-£47,000, while a 100kWp system costs £75,000-£100,000. Prices vary by system size, roof complexity, and installer. Businesses can claim capital allowances and benefit from reduced energy bills.
Are commercial solar panels worth it?
Yes. Commercial solar typically pays back in 5-7 years thanks to high daytime self-consumption, larger system economies of scale, and tax benefits. Businesses can claim 100% capital allowances (Annual Investment Allowance) on solar installations, effectively getting tax relief on the full cost.
Do I need planning permission for commercial solar panels?
Commercial solar installations on non-domestic buildings in England usually fall under permitted development if panels don't protrude more than 200mm from the roof surface. However, larger ground-mounted systems (over 1MW) and installations on listed buildings or in conservation areas require planning permission. Always check with your local planning authority.
Can I get solar panels for my business?
Yes, any UK business with a suitable roof or yard can install solar. The most common configurations are rooftop solar on warehouses, offices, and retail units (50-500kWp), and ground-mount systems for farms and rural sites (250kWp-1MWp). Systems are typically funded from cash, asset finance, leasing, or via a Power Purchase Agreement (PPA) with zero upfront cost.
Are solar panels good for businesses?
Yes, commercial solar typically delivers a 5-7 year payback and 15-20% IRR. Daytime self-consumption is high (commercial usage matches solar generation), and the Annual Investment Allowance provides 100% first-year tax relief. Most UK Tier-1 corporates have signed on to commercial solar in the past 3 years for both bill savings and ESG reporting.
What size solar panels do I need for my business?
Size by daytime electricity consumption. As a rule of thumb, 1kWp generates ~850 kWh/year in the UK; aim for a system that produces 70-90% of your daytime usage. Most small businesses install 20-50kWp; medium businesses 50-250kWp; large industrial sites 250kWp-1MWp. A free energy survey from a commercial installer will size it precisely.
How long do commercial solar panels last?
Commercial-grade solar panels carry 25-year linear performance warranties (typically 87% output guaranteed at year 25) and physically last 30+ years. Inverters last 10-15 years and need one replacement during the system lifetime, costing £3,000-£15,000 depending on system size. Total system lifetime is 30 years with one inverter mid-life.
Are solar panels for commercial buildings worth it?
Yes, for most commercial buildings with daytime electricity use and a suitable roof, payback is 5-7 years against a 25-year asset life. Manufacturing sites, distribution centres, schools, offices, and retail parks all see strong returns. Key checks: roof structural capacity, age (>15 years remaining ideally), shading, and DNO grid availability.
Related Guides
Solar Panels for Schools
Costs, Salix grants, PPAs, and payback for UK schools and academies.
Farm Solar
Farm solar panels: FETF grants, costs, and sizing by farm type.
Solar Incentives
0% VAT, Smart Export Guarantee, ECO4, and business capital allowances.
Solar Panel Costs
Full cost breakdown and payback periods.
Export Payments
Earn 3–15p/kWh with the Smart Export Guarantee.
Solar Financing
Loans, payment plans, and how to finance solar panels.
Sources
- GOV.UK, Annual Investment Allowance (AIA)
- GOV.UK, Enhanced Capital Allowances for Energy-Saving Technologies
- Ofgem, Smart Export Guarantee (SEG)
- MCS, Certified Installer Register
Last updated: June 2026
John Rooney is the founder of Solar Info and has been covering the UK solar energy market since 2023. He researches every battery and inverter brand against manufacturer datasheets, MCS and Ofgem data, and feedback from the MCS-certified installers in our directory before publishing.
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