Commercial Solar Panels for UK Businesses
Fully-installed commercial solar systems for UK businesses — designed, installed, and commissioned end-to-end by Solar4Good engineers.
- ✓0.02% return rate across 10,000+ panels installed — the most reliable in the category
- ✓In-house MCS-certified engineers — no subcontractors, full workmanship warranty
- ✓DNO / G99 application + Full Expensing guidance handled in-house
No high-pressure sales. We don't share your details. A real engineer will respond within one working day.
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How commercial solar is priced — what actually moves the number
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.
System size (kW)
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.
Roof complexity
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 at survey.
Hardware tier
Tesla Powerwall and SIG Energy sit at the top tier — best long-term reliability, best warranty position. Duracell and AlphaESS are solid middle-tier. Fox ESS, GivEnergy, 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.
DNO outcome (G98 / G99)
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 — 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.
Market conditions
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 |
Why we publish ranges, not fixed prices
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 — Tesla and SIG Energy sit at the top end; Fox ESS and GivEnergy 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 free site survey — and the survey is free whether you choose us or not.
The only way to know your precise number is a free site survey. We confirm to the pound after seeing the roof.
Get a precise quote →Why our installs stay installed
Across 10,000+ panels installed by Solar4Good in the past 12 months, we've had exactly 2 service-call returns. That's 0.02%.
We publish this number because nobody else in the UK commercial solar market does — 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 — Tesla and SIG Energy at the top tier, Duracell and AlphaESS as the solid middle, Fox ESS and GivEnergy for tighter budgets without compromising MCS compliance.
Choose the right size for your business
- Panels: 70 × DMEGC or Jinko 440 W (Tier-1)
- Annual generation: ~28,500 kWh
- Inverter: Fox ESS three-phase, 10-yr warranty
- Battery: Fox ESS 13 kWh add-on available
- Monitoring: Solar4Good app, lifetime access
- Warranty: 25 yr panel · 10 yr inverter · 5 yr workmanship
- DNO / G99: filed by Solar4Good (G98 fast-track for some setups)
- Best annual bill: £8,000 – £14,000
- Panels: 115 × Jinko or JA Solar 440 W (Tier-1)
- Annual generation: ~47,500 kWh
- Inverter: Fox ESS or Solis three-phase, 10-yr warranty
- Battery: Fox ESS 20 kWh or AlphaESS add-on available
- Monitoring: Solar4Good app, lifetime access
- Warranty: 25 yr panel · 10 yr inverter · 5 yr workmanship
- DNO / G99: filed by Solar4Good, typical approval 2–6 weeks
- Best annual bill: £18,000 – £24,000
- Panels: 225 × Trina or Aiko 440 W (Tier-1, bifacial option)
- Annual generation: ~95,000 kWh
- Inverter: Fox ESS or SigenStor commercial, 10-yr warranty
- Battery: SIG Energy or Tesla Powerwall, 50 kWh add-on available
- Monitoring: Solar4Good platform + Sigen Cloud / Tesla app
- Warranty: 25 yr panel · 10 yr inverter · 5 yr workmanship
- DNO / G99: filed by Solar4Good, typical approval 4–8 weeks
- Best annual bill: £42,000 – £50,000
Final design and hardware mix depend on roof, demand profile, hardware tier, battery configuration, and DNO outcome — confirmed after a free site survey.
Annual bill not in one of these three brackets? See the full 9-row ranges table in § 4 — we install systems from 20 kW (£8k bill) up to 1 MW. Multiple sites or unusual roof type? Our commercial team handles bespoke design. Talk to our commercial team →
What size system does your business need?
Tell us about your business
Your estimate
Based on UK commercial averages and Solar4Good's actual install data. Exact figures, including the financial breakdown, are confirmed after a free site survey by an MCS-certified engineer.
UK businesses pick us because the maths is honest
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
Three things every UK commercial buyer should know
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.
Your local grid has to say yes
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.
Most commercial sites have it — solar must match
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 — Fox ESS, Solis, or SigenStor — from day one.
HMRC effectively pays a quarter of your system
Under Full Expensing (active to March 2026 and extended), your business can deduct 100% of the system cost from taxable profits in the year of purchase. At 25% corporation tax that's £25 back for every £100 spent. A £50k system becomes £37.5k net. Combined with 0% VAT and SEG export income, the effective payback can drop below 4 years. We provide the paperwork; your accountant files it.
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.
How a commercial solar install actually works
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.
Free site survey
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.
DNO / G99 application
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.
System design + fixed quote
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.
Scaffolding & access planning
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.
Install + commissioning
In-house engineers (no subcontractors), MCS-compliant. 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 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.
Monitoring + handover
Solar4Good monitoring app installed 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.
Ongoing support
Lifetime monitoring access. Phone, WhatsApp, and on-site engineer visits where needed. 25-year panel warranty, 10-year inverter warranty, 5-year workmanship warranty — all backed by Solar4Good directly, not a finance partner.
Solar panels for business — sector by sector
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 15 UK sectors Solar4Good installs commercial solar PV systems across — each with a dedicated page covering sector-specific design, planning, and funding.
Commercial systems we've delivered
Twenty-two UK businesses — surgeries, care homes, 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.
Commercial solar grants & funding (2026)
There are very few direct cash grants for commercial solar in the UK in 2026. What does exist — and adds up to more than most grants would — is a stack of tax reliefs and incentives. 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.
Full Expensing
Deduct the full cost of qualifying capital expenditure from taxable profits in the year of purchase. Available to companies paying UK corporation tax.
Annual Investment Allowance
An alternative or complement to Full Expensing for qualifying expenditure. Useful for smaller businesses or where Full Expensing doesn't apply.
0% VAT on commercial solar
Confirmed for 2026 — eliminates the VAT line on the install vs alternative kit.
Smart Export Guarantee
Payment from your energy supplier for excess electricity exported to the grid. Rates vary by supplier; we identify the best fit for your install.
Enhanced Capital Allowances
Specific to energy-efficient equipment. We confirm which assets in your system qualify for the enhanced relief.
Sector-specific schemes
Salix Finance (public sector / schools), Welsh Government, Scottish SME loan, local authority programmes. Coverage shifts; we keep a current list.
Solar panels and business rates: what UK businesses need to know
Solar panels installed on a commercial property do not increase your business rates in England, Wales, or Scotland. The Valuation Office Agency excludes microgeneration assets from rateable value. Combined with Full Expensing and 0% VAT, commercial solar carries one of the most tax-favourable positions of any capital asset a UK business can install.
- ✓No business rates increase on solar installed on commercial property (VOA microgeneration exclusion, England / Wales / Scotland)
- ✓Full Expensing lets you deduct qualifying capital expenditure from taxable profits in year one
- ✓0% VAT on commercial solar — confirmed for 2026
- ✓SEG income is paid by your energy supplier on exported surplus
- ✓No effect on the rateable value of the building if you sell or refinance the premises
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.
Read the full business rates & tax relief guide →Commercial solar deep guides
Commercial solar — frequently asked questions
Cost & ROI
Process & Install
Finance & Tax
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