Commercial Solar Panel Installation in West Sussex & the South East
NICEIC approved solar panel installation for businesses, schools and commercial properties. Rooftop and ground-mounted systems designed around your energy profile — with battery storage and EV charging integrated where required.
Built on commercial electrical experience. Omni3 has more than 10 years of experience delivering electrical, security and telecommunications projects in commercial environments — including schools, warehouses, sports clubs and commercial premises. That foundation underpins our approach to commercial solar: systems specified correctly, projects delivered to programme, and documentation that meets procurement requirements.
Talk to Our TeamCommercial solar for a wide range of properties and organisations
If your property has meaningful roof space or available ground area and a daytime electricity demand, it is worth assessing for solar. We survey a broad range of commercial property types across West Sussex and the South East.
Warehouses
Offset significant daytime electricity loads from large roof areas.
Industrial & Manufacturing
Reduce energy overheads on sites with sustained daytime consumption.
Offices & Business Parks
Lower occupancy costs and support ESG reporting.
Schools & Education
Cut running costs, support curriculum objectives and demonstrate environmental leadership.
Sports & Leisure
Reduce energy costs on facilities with high and consistent electricity demand.
Farms & Agricultural
Large roof and land areas make agricultural properties well suited to solar.
Retail
Offset daytime trading loads and reduce energy cost per square metre.
Hospitality
Hotels, pubs and restaurants can reduce energy spend and offer EV charging as an amenity.
Commercial Landlords
Improve asset value and appeal to ESG-conscious tenants.
Property Developers
Integrate solar into new build commercial and mixed-use schemes.
Public Sector
Local authorities, housing associations and public bodies reducing energy costs and carbon.
Other Commercial Premises
If your property has significant roof space and a daytime electricity load, it is worth assessing.
Solar, battery storage and EV charging — designed as one system
Most commercial energy investments work best when the components are designed together from the outset, rather than added separately over time. Omni3 designs and installs integrated systems — with one team, one project plan and one commissioning process.
Solar PV
Rooftop and ground-mounted solar arrays sized to your energy profile and available roof or land area. Monocrystalline panels, commercial-grade inverters, DNO and G99 management included.
Battery Storage
Commercial battery storage for peak demand management, overnight grid charging and energy resilience. Designed to work with your solar system and electricity tariff.
Learn moreEV Charging
Workplace and fleet EV charging infrastructure with load management. OZEV approved for grant-eligible installations. Solar-linked charging reduces your cost per kWh to near zero.
Learn moreUnderstanding the commercial financial case
Commercial solar is a capital investment with a measurable annual return. The financial case is site-specific — shaped by your consumption profile, roof and system size, electricity rate, and available reliefs. The following is a factual summary to inform your initial thinking.
VAT — 20% standard rate
Commercial solar installations are subject to 20% standard rate VAT. The 0% rate that currently applies to residential installations does not extend to commercial premises. Budget for VAT at 20% on all equipment and labour costs.
VAT-registered businesses can reclaim input VAT in the normal way subject to their VAT recovery position.
Capital allowances — AIA
Commercial solar panels qualify for capital allowances as plant and machinery. They are classified as special-rate expenditure by HMRC and do not qualify for Full Expensing (which applies to main-rate assets only). Most businesses can claim the Annual Investment Allowance (AIA) — a 100% deduction against taxable profits in the year of purchase, up to £1 million annually.
Tax treatment depends on individual circumstances. Confirm your position with a qualified accountant.
Payback — indicative range
Commercial solar payback periods typically range from 5–9 years, with solar system lifespans of 20–25 years. Actual payback is highly site-specific and depends on system size, capital cost, electricity consumption profile, self-consumption ratio, electricity rate at the meter, and available tax relief. We model projected payback as part of your free site survey — we do not quote generic figures as a substitute for site-specific analysis.
Smart Export Guarantee (SEG)
Commercial solar installations up to 5 MW capacity may be eligible for SEG payments on electricity exported to the grid. For customers wishing to apply for a Smart Export Guarantee tariff, an installation completed by an MCS-certified installer forms an important part of the eligibility process. Omni3 Limited is MCS certified for Solar PV installation under MIS 3002. Customers must also meet the metering and individual requirements of their chosen SEG supplier. We provide the relevant installation documentation for qualifying MCS installations.
For deeper financial analysis
Our commercial solar insights hub covers ESG benefits, EBITDA impact, capital allowances, VAT treatment and ROI modelling in detail.
Free commercial site survey — no obligation
Ready to assess your site?
We survey, design and model your system — at no cost and no commitment.
From survey to commissioning
Commercial solar projects involve more moving parts than residential installations — DNO applications, planning checks, structural assessments and procurement lead times all affect the programme. We manage the process end to end.
Free site survey
We assess your roof or land area, review your electricity bills and consumption pattern, check DNO availability for your location, and confirm planning status. No charge, no commitment.
System design
Energy yield modelling, structural assessment where required, inverter and panel specification, and integration design for battery storage and EV charging if applicable. We design around your energy profile, not a standard template.
DNO notification or application
Systems up to 3.68 kW per phase (up to 11.04 kW total on three-phase supplies) use the simpler G98 notification process. Systems above this threshold require a G99 application, submitted to your DNO before installation begins. For UK Power Networks — the DNO serving West Sussex — the full G99 process, from application to energisation, can take several months depending on network capacity and application complexity. We manage this process on your behalf and factor the programme into project planning from the outset.
Planning assessment
Commercial rooftop solar in England is generally permitted development under Class J of the GPDO, subject to dimensional conditions — panels must not exceed specified protrusion limits and the installation must not be on a listed building or in certain designated areas. Where planning permission is needed, we advise at survey stage. There is no capacity (MW) limit under Class J.
Procurement
We procure through our established wholesale accounts. Equipment lead times for commercial-scale systems vary and are confirmed during project development.
Installation
On-site duration varies by system scale, roof type, access requirements and the scope of associated electrical work. Every commercial project is delivered with a site-specific programme. We coordinate scaffold, access and operational constraints with you in advance.
Commissioning, testing and handover
Full electrical testing, DNO commissioning notification, monitoring configuration and a complete documentation pack — electrical installation certificate, commissioning report and product warranties. All work is NICEIC approved and certified to BS 7671.
Independently assessed and qualified
Commercial procurement often requires documented evidence of quality management systems, insurance and relevant accreditations. The following are current and available on request.
NICEIC Approved Contractor
Electrical quality assurance — all installations certified to BS 7671
ISO 9001
Quality management system
ISO 14001
Environmental management system
ISO 45001
Health and safety management system
ISO 27001
Information security management
RECC Member
Renewable Energy Consumer Code
OZEV Approved Installer
Government EV chargepoint grant schemes
TrustMark Registered
Government endorsed quality scheme
ECA Member
Electrical Contractors' Association
City & Guilds Qualified
Solar PV, Battery Storage and EV Charging
Insurance
Public Liability
£10,000,000
Employers' Liability
£5,000,000
Professional Indemnity
£250,000
Certificates of insurance available on request. Contract Works/installation cover is also in place.
Commercial solar — common questions
The Omni3 Smart Energy Bulletin
Each month we publish a short, practical email covering energy price movements, smart tariff changes, government incentives, battery technology updates and seasonal energy-saving advice. No sales content — just useful information.
Related pages
Commercial Solar Insights
Guides for business decision-makers on solar, ESG and ROI
Commercial Solar Guide
Free guide — commercial solar, battery storage and energy strategy
Home Battery Storage
Battery storage for homes and commercial properties
EV Charger Installation
Workplace and fleet charging — OZEV approved installer
Finance Options
Spread the cost of eligible renewable energy installations
Solar Panel Cost Guide
Residential solar installation — service and pricing overview
Business Energy Resilience
Our integrated commercial energy package
Accreditations
Full list of qualifications, certifications and accreditations
Request a commercial solar survey
Tell us about your property and what you are trying to achieve. We arrange a free site survey, assess your roof area and energy profile, and produce a written proposal covering system design, projected energy yield, financial modelling and programme. No charge, no commitment.
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01798 263333