Why Choose Commercial Solar Panel Installation?
Electricity is now one of the largest controllable overheads on a commercial P&L — and one of the few you can fix permanently rather than renegotiate every two years.
A well-sized commercial solar system generates power on your own roof, at a cost per kWh far below anything a supplier will offer you, for 25 years or more. Most businesses that use the bulk of their electricity during daylight hours — warehouses, factories, offices, schools, farms, retail units — offset between 30% and 80% of their annual import and see the capital cost returned within four to seven years.
The difference between a good commercial installation and a poor one is almost entirely in the design. Size it from a rule of thumb and you either underbuild and leave savings on the table, or overbuild and export cheap power you should have used yourself. We size every system from your actual half-hourly meter data.
What commercial solar delivers:
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Lower, more predictable energy costs. Self-generated power insulates you from wholesale volatility and standing charge increases for the life of the system.
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A capital asset, not a running cost. Solar PV qualifies for capital allowances, so a large share of the cost can be written off against corporation tax in year one.
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Genuine energy independence. Less grid reliance, less exposure to price shocks, and with battery storage, resilience when supply is interrupted.
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Measurable ESG credentials. Not a statement of intent — a metered, reportable reduction in Scope 2 emissions you can put in a tender response.
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Improved building value and lettability. An improved EPC and a working generation asset both count at sale or lease renewal.
Our Turnkey Commercial Solar Panel Installation Service
Optimum Electrics designs and installs commercial solar PV across England, from single-unit offices to large warehouse and industrial roofs. We manage the entire project in-house — including the parts most businesses find slowest, like grid applications and structural sign-off.
What's included:
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Free site visit and technical survey. Roof area, orientation, pitch, shading, structural loading capacity and existing switchgear all assessed before a single figure is quoted.
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Consumption-based system design. We size from your half-hourly meter data, not your floor area, so the system matches how your business actually uses power through the day and across the year.
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Full DNO application handling. Commercial systems require a G99 connection application to your Distribution Network Operator. We prepare and submit it, and manage the process through to approval.
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A detailed written proposal. Itemised costs, projected annual generation in kWh, self-consumption forecast, export estimate, and a payback model your finance team can interrogate.
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Fully accredited installation. MCS certified, NICEIC approved, TSI approved, HIES registered. Design, supply, install, commission and hand over.
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Industry-leading warranties. Product warranties of up to 40 years on selected panels, with inverter and workmanship cover alongside.
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Transparent pricing. One fixed proposal. No provisional sums, no variations appearing halfway through.
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Ongoing maintenance and monitoring. Annual servicing, performance reporting and remedial work to keep output where the design said it would be.
Why Choose Optimum Electrics?
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We're electrical contractors first. Commercial solar is an electrical installation before it's a renewables product. DC and AC circuits, isolators, protective devices, switchgear integration and certification are our core discipline, not something we subcontract.
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Real commercial-scale delivery. Warehouses, industrial roofs, flat roofs, large offices and community buildings — including a 34kW commercial installation in Cambridge and a 20.4kW PV and battery system at the Eastrea Centre, Whittlesey.
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Accredited and certified. MCS, NICEIC, TSI and HIES — the certifications that matter for commercial sign-off, insurance and Smart Export Guarantee eligibility.
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Long-term ownership, not a one-off sale. Up to 40-year product warranties, maintenance contracts and monitoring, so the asset performs across its full life.
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Based in Peterborough, covering England. Local project management and installation teams, with the scale to deliver nationally on larger commissions.
Commercial Solar Panel Maintenance
A commercial PV system is a 25-year electrical asset sitting on your roof. It will earn what the design promised for decades — but only if it's inspected, tested and monitored properly.
Underperformance is rarely dramatic. It's a failing bypass diode, a soiled string, a loose DC connection or an inverter fault that quietly costs you 8% of generation for eighteen months before anyone notices. Regular servicing catches it while it's still cheap to fix.
As MCS-certified commercial specialists we provide maintenance packages for systems of all sizes across warehouses, manufacturing sites, retail, offices, schools, agricultural operations and community buildings.
What's included in our commercial solar maintenance service;
Flexible annual, bi-annual and tailored plans, typically covering:
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Full visual and electrical inspection of panels, inverters, batteries and cabling
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Thermal imaging — drone or handheld — to identify hotspots and failing modules
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Performance analysis: actual generation measured against design expectation, string by string
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Testing of isolators, DC circuits, AC circuits and protective devices
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Verification of mounting structures, fixings and mechanical integrity
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Inspection of battery storage systems where installed
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Panel cleaning, or a cleaning schedule recommendation based on site conditions
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Updated on-site documentation and schematics
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Staff guidance on monitoring platforms and system optimisation
What You’ll Get From Your Commercial Solar System
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Substantially reduced energy bills. Every kWh you generate and use on site is a kWh you don't buy. For daytime-operating businesses this typically covers 30–80% of annual consumption.
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Capital allowances against corporation tax. Commercial solar is generally treated as an integral feature for capital allowance purposes, which means it can usually be claimed in full under the Annual Investment Allowance up to the £1m threshold, or at the 50% first-year allowance above it. Speak to your accountant about your specific position — but the tax treatment materially shortens real payback.
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Income from exported power. Surplus generation can be sold back through the Smart Export Guarantee, so the system earns even outside your operating hours.
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Verified carbon reduction. A metered, auditable cut in Scope 2 emissions for ESG reporting, tender submissions and supply chain requirements.
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Battery storage integration. Store surplus daytime generation for evening operations, night shifts and darker winter months — and increase self-consumption rather than exporting at a lower rate.
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EV charging integration. Charge company vehicles and staff cars from your own generation, turning fleet electrification from a cost into a saving.
Mrs K Garfield
"We had the wonderful team at Optimum Electrics install solar panels on our roof last month and I couldn't recommend them enough for professionalism and excellent standard of work, right from getting in to touch for a quote to the after care once the system was fitted. Looking forward to saving money on our bills now!"
Mr S Jeffries
"A friend recommended Optimum Electrics to me for the installation of solar panels at my home. I quickly received a quote and was given loads of personalised information about getting the most out of our system. The installers were very polite and professional. Competitively priced as well. Highly recommend."