Fully-installed commercial solar systems for UK businesses, designed, installed and commissioned end-to-end by Solar4Good® engineers.
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Every commercial solar system is priced individually because every commercial roof is different. Five factors decide your final number: system size, roof complexity, hardware tier, DNO outcome, and current market conditions. Below is exactly how each one moves the price, so you know what to ask any installer, not just us.
Bigger systems share fixed costs (scaffolding, design, DNO application, project management) across more panels, so the cost per kW drops as the system grows. A 30 kW SME system has a higher per-kW cost than a 150 kW industrial install. We size to your actual demand, not the maximum the roof can hold.
Flat ballasted roofs, pitched tile, standing-seam metal, trapezoidal industrial sheeting, and asbestos all require different mounting systems and access plans. Multi-pitch roofs, height restrictions, fragile coverings, or structural reinforcement requirements all move the number. Confirmed on site.
Sigenergy sits at the top tier, with the best long-term reliability and the best warranty position. AlphaESS is solid middle-tier. Fox ESS, Solis, and Dyness give a tighter-budget option without compromising MCS compliance. We recommend the right tier for your business, not the highest-margin product.
Systems under 3.68 kW per phase clear G98 automatically. Most commercial systems above that need G99 approval from your local Distribution Network Operator. The outcome, whether that is full approval, export-limited approval or upgrade-required, directly affects the inverter and battery sizing of your final system. We lodge the G99 application on your behalf.
Panel, inverter, and battery prices shift quarterly with global supply, currency, and policy. Scaffolding and labour rates move locally. We re-benchmark our pricing every quarter against actual market costs, so the quote you receive reflects today, not last year.
Below are typical fully-installed price ranges Solar4Good quotes for UK commercial systems in 2026. The £/kW figure drops as systems scale, because fixed costs (scaffolding, design, DNO application) spread across more panels. The “best annual bill” column shows the bill range a business should have for that system size to make sound financial sense.
| System size | £ / kW range | Total fully installed | Best annual bill |
|---|---|---|---|
| 30 kW | £900 – £1,000 | £27,000 – £30,000 | £8,000 – £14,000 |
| 40 kW | £1,000 | £40,000 | £12,000 – £18,000 |
| 50 kW | £900 – £950 | £45,000 – £47,500 | £18,000 – £24,000 |
| 60 kW | £900 – £950 | £54,000 – £57,000 | £24,000 – £30,000 |
| 70 kW | £900 – £950 | £63,000 – £66,500 | £30,000 – £36,000 |
| 80 kW | £850 – £900 | £68,000 – £72,000 | £36,000 – £42,000 |
| 100 kW | £800 – £850 | £80,000 – £85,000 | £42,000 – £50,000 |
| 120 kW | £750 – £800 | £90,000 – £96,000 | £54,000 – £62,000 |
| 150 kW | £750 – £800 | £112,500 – £120,000 | £72,000 – £80,000 |
Every commercial roof is different. A 50 kW install on a clean, accessible single-pitch metal roof costs less than a 50 kW install on a heritage building with multi-pitch tile and limited access. Hardware tier moves the number too. Sigenergy sits at the top end; Fox ESS and Dyness sit at the budget end.
Publishing the range is the honest move. Fixed prices on a landing page either inflate to cover the worst case (overcharging the easy jobs) or set unrealistic expectations (undercharging the complex ones). We confirm your exact figure after a site visit, and the site visit is free whether you choose us or not.
The only way to know your precise number is a site visit. We confirm to the pound after seeing the roof.
2 returns across the 10,000+ panels we installed in the last 12 months.
We have not found another UK commercial installer publishing theirs. Ask why.
Across 10,000+ panels installed by Solar4Good in the past 12 months, we’ve had exactly 2 service-call returns. We publish this because we have not found anyone else in the UK commercial solar market publishing theirs, and it’s the single most important number in solar installation. The cheapest quote often produces the most expensive long-term outcome: panels that fail, inverters that drop offline, mounting that loosens. A 25-year roof investment is the wrong place to discover your installer cut a corner.
The 10k:2 figure is what reliability actually looks like, measured against installs, not against marketing. It’s also why we’re picky about the hardware we put on commercial roofs: Sigenergy at the top tier, AlphaESS as the solid middle, Fox ESS and Dyness for tighter budgets without compromising MCS compliance.
Final design and hardware mix depend on roof, demand profile, hardware tier, battery configuration, and DNO outcome, confirmed after a site visit.
Annual bill not in one of these three brackets? See the full 9-row ranges table above. We install systems from 20 kW (£8k bill) up to 1 MW. Multiple sites or unusual roof type? Our commercial team handles bespoke design.
Based on UK commercial averages and Solar4Good’s actual install data. Exact figures, including the financial breakdown, are confirmed after a site visit by an MCS-certified engineer.
Manan is a core leader at Solar4Good, known for his “leader without title” philosophy: leadership is earned through truth, service and customer-first thinking. With 15+ years of financial consulting experience across the UK and Europe and extensive experience educating customers about solar, he brings clarity and trust to renewable energy decisions for UK businesses. Manan has spoken at the Everything Electric Show and The Care Show, and has been featured on the BBC, Lyca Radio, Asian Voice, The Mirror, and The Independent. “Think of us less as sellers, more as partners, always learning, always serving.”
Family-run, UK-based, no broker, no commission-driven sales.
In-house engineers, Eddie’s team has installed 75% of all S4G jobs.
85+ commercial systems delivered, MCS-certified throughout.
Most commercial solar quotes confuse buyers because three pieces of UK-specific jargon do real work in the maths. Here they are, in plain English, before you talk to anyone.
Any commercial system above 3.68 kW per phase needs a G99 application to your Distribution Network Operator (UKPN, Western Power, SSEN, etc). The DNO decides whether your local grid can take the export. Approval takes 2–8 weeks. Solar4Good lodges it for you and handles the back-and-forth. For systems where it applies, a G98 fast-track can save weeks.
Almost every UK commercial building runs on a three-phase electricity supply (vs single-phase in homes). Your solar inverter must match. A residential single-phase inverter on a commercial site will work poorly, fail compliance, and likely fail at the DNO stage. Every Solar4Good commercial design specifies a three-phase inverter, whether Fox ESS, Solis or SigenStor, from day one.
Solar panels are generally classified as special-rate plant and machinery for capital allowance purposes. Depending on the circumstances, qualifying businesses may be able to claim the Annual Investment Allowance, which may give 100% relief on qualifying expenditure up to the £1 million annual limit. For a company paying corporation tax at the 25% main rate that is £25 back for every £100 spent, so a £50k system could have a net cost of £37.5k. That example is illustrative; your accountant confirms what applies to you.
If your installer can’t answer these three questions in plain English, find a different installer. The DNO, the phase, and the tax position should never be a mystery to a UK commercial buyer.
MCS-certified · HIES member · TrustMark approved · Solar4Good Ltd, est. 2020
Commercial solar installation is not the same job as residential. Below are the eight stages we run every UK commercial project through, from first call to monitoring handover.
A Solar4Good engineer visits, checks roof structure, electrical supply (single-phase vs three-phase, available capacity), DNO context, and inspects for asbestos, shading, and access constraints. No quote signed yet.
For any system above 3.68 kW per phase we lodge the G99 application with your DNO (UKPN, Western Power, SSEN, etc). We handle the technical drawings, energy modelling, and back-and-forth. Approval: 2–8 weeks.
Detailed design with panel layout, hardware specs (panel brand/wattage, inverter, battery), generation modelling in kWh, payback maths, Capital Allowances calculation, and SEG export projection. Fixed price, written, all assumptions on the page.
For commercial roofs we plan scaffolding and access separately. Most installs are scaffolded externally so your operations continue uninterrupted. For warehouses and industrial sites we use cherry-picker or rope-access where appropriate. Method statement and CDM-compliant.
Installed to MCS standards and certified by us. Typical install time: 3–10 days for 30–100 kW; 10–20 days for 100–500 kW; longer for multi-roof or ground-mount. Commissioning includes inverter setup, monitoring connection, and DNO export sign-off.
MCS certificate issued on completion, required for SEG registration, insurance, and Capital Allowances paperwork. Solar4Good MCS registration: NAP/72775/25/4. We also issue the HIES insurance-backed workmanship warranty.
Your system’s monitoring app is set up and demonstrated. Your finance team gets the Capital Allowances paperwork. Your operations team gets the kit manuals, SEG registration, and a 24/7 dashboard showing live generation, consumption, and export.
Lifetime monitoring access. Phone, WhatsApp, and on-site engineer visits where needed. 25-year panel warranty, 10-year inverter warranty, 5-year insurance-backed workmanship warranty, all backed by Solar4Good directly, not a finance partner.
Solar panels for business work differently depending on what you run. A warehouse with large flat roofs has a different solar profile than a care home with 24/7 demand, or a farm with mixed roof and ground-mount opportunities. Below are the 14 UK sectors Solar4Good installs commercial solar PV systems across. Each has a dedicated page covering sector-specific design, planning and funding.
Vast unshaded roofs and steady daytime demand make warehouses the strongest solar match in commercial property. Most of what the roof generates is consumed on site, so payback is fast and predictable.
Get a quote for this sector →Read the full guide →Twenty-two UK businesses, from surgeries and care homes to hotels, retailers, manufacturers and property groups, that cut their energy bills and accelerated their net-zero targets with Solar4Good. Below are three with full published numbers.
49.2 kW · 73% bill reduction · 120 panels.
79.65 kW · 177 panels · multi-orientation roof.
51.6 kW · ~58,000 kWh/yr · grid-independence.
67% off a Park Royal pharmacy’s power bill.
53 kW on a steep, awkward roof.
Cleaner power for a home that never switches off.
Solar across a whole multi-let building.
Production continued uninterrupted throughout the install.
Solar sensitively fitted to a place of worship.
Guest-facing sustainability, lower running costs.
A working yard, powered by its own roof.
24/7 clinic load, covered by daytime solar.
A multi-unit commercial estate goes solar.
49.2 kW · 73% bill reduction · 120 panels.
79.65 kW · 177 panels · multi-orientation roof.
51.6 kW · ~58,000 kWh/yr · grid-independence.
67% off a Park Royal pharmacy’s power bill.
53 kW on a steep, awkward roof.
Cleaner power for a home that never switches off.
Solar across a whole multi-let building.
Production continued uninterrupted throughout the install.
Solar sensitively fitted to a place of worship.
Guest-facing sustainability, lower running costs.
A working yard, powered by its own roof.
24/7 clinic load, covered by daytime solar.
A multi-unit commercial estate goes solar.
Verified reviews from business and organisation customers on Trustpilot and Checkatrade. These are the commercial installs. Our full review wall covers every Solar4Good customer.
“56 panels installed. The system now generates 24,000 to 26,000 kWh a year, covering 35 to 40% of our energy needs, with ROI on track for under 6 years. Professional, transparent and reliable from start to finish.”
There are very few direct cash grants for commercial solar in the UK in 2026. What does exist instead is a stack of tax reliefs and incentives, and it adds up to more than most grants would. Combined, these meaningfully reduce the true cost of a commercial solar system. The Solar4Good team handles the eligibility paperwork as part of every commercial install.
The Annual Investment Allowance may provide 100% tax relief on qualifying plant and machinery expenditure, up to the applicable annual limit of £1 million. Eligibility depends on the nature of the expenditure, the business and the relevant capital allowance rules.
Commercial solar installations are generally subject to the standard VAT rate of 20%, unless a specific VAT relief applies. A temporary 0% rate is available for qualifying installations of energy-saving materials, including solar panels, in eligible residential accommodation such as care homes and student accommodation, and certain buildings used solely for relevant charitable purposes. That relief is currently scheduled to run until 31 March 2027, subject to HMRC’s conditions. From 1 April 2027 it is due to revert to the reduced rate of 5% (HMRC VAT Notice 708/6). Ordinary commercial premises do not qualify simply because solar panels are installed.
Payment from your energy supplier for excess electricity exported to the grid. Rates vary by supplier; we identify the best fit for your install.
The business rates treatment of solar installations depends on the property’s location, the installation and the applicable valuation rules. Certain installations may qualify for specific valuation treatment or relief, but this should not be assumed for every commercial solar system. We recommend checking the position for your property and proposed installation before proceeding.
Salix Finance (public sector / schools), Welsh Government, Scottish SME loan, local authority programmes. Coverage shifts; we keep a current list.
The information on this page is general guidance only and is not personalised tax advice. Capital allowances, VAT treatment, business rates and export payments depend on the installation, the property, your business structure and the applicable legislation. Financial examples are illustrative and are not guarantees of tax or energy savings. Please confirm the treatment for your circumstances with your accountant. Official guidance: HMRC VAT Notice 708/6, Ofgem Smart Export Guarantee, GOV.UK Business Rates.
The business rates treatment of solar installations depends on the property’s location, the installation and the applicable valuation rules. Certain installations may qualify for specific valuation treatment or relief, but this should not be assumed for every commercial solar system. We recommend checking the position for your property and proposed installation before proceeding.
The exact tax position for your business depends on your corporation tax rate, accounting period, and capital allowance history. Your accountant confirms the position; we provide the documentation needed.
Can’t find what you’re looking for? Talk to our team, ask us anything, no pressure.
Pricing transparency, the three pieces of UK jargon that move the maths, an 8-stage install process, and 7 questions every UK commercial buyer should ask before signing. Get the PDF sent to your inbox instantly.
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