Commercial solar panels for your business

Investing in commercial solar panels can significantly reduce a business's electricity bills and enhance its energy independence. With increasing energy costs and a growing focus on sustainability, solar photovoltaic (PV) systems offer a robust solution for businesses looking to control operational expenses and contribute to a greener future. This guide provides clear insights into the financial viability, practical implementation, and available support for installing solar panels on commercial premises.

While Fuse Energy currently focuses on residential energy supply and does not offer commercial solar panel installation or business energy supply, we are committed to building a future with abundant energy for all. We invite interested businesses to join a waitlist for future commercial services.

Why invest in business solar panels?

Commercial solar panels are more than just an environmental statement; they are a strategic asset that delivers tangible benefits to businesses. By generating your own electricity, you gain greater control over energy costs and supply, aligning with a vision of abundant energy.

Reduce operating costs

The most immediate and compelling benefit of commercial solar is the potential for substantial savings on electricity bills. A well-designed system can cut a business's electricity costs by 40-70% of daytime usage, particularly for those with high daytime energy consumption. This direct saving helps insulate businesses from volatile energy prices and provides long-term financial stability.

Enhance sustainability and brand image

Adopting solar energy demonstrates a commitment to environmental responsibility, which can significantly enhance a business's brand image and appeal to increasingly eco-conscious customers and partners. It also contributes to corporate sustainability goals and the UK's net-zero targets.

Achieve energy independence

Generating your own power reduces reliance on the National Grid, offering greater energy independence and security. This can be particularly valuable during periods of grid instability or high wholesale prices, ensuring a more consistent and predictable energy supply for your operations.

Future-proof your business

With a typical lifespan of 25 to 30 years, commercial solar PV systems are a durable, long-term investment. They provide a hedge against future energy price increases and position your business at the forefront of sustainable practices, ensuring relevance and resilience in an evolving energy landscape.

Commercial solar panel costs and return on investment

Understanding the financial outlay and potential returns is crucial for any business considering solar. The initial investment can be significant, but the long-term benefits often outweigh the upfront costs.

Understanding system sizes and pricing

The cost of a commercial solar panel system in the UK varies depending on its size, complexity, and specific installation requirements. Commercial solar installations typically cost between £660 and £1,200 per kilowatt peak (kWp) installed in 2026. Larger systems generally benefit from economies of scale, meaning the cost per kWp decreases as system size increases. For example, a 100kWp system might cost around £70,000-£95,000, while smaller systems in the 10-30kWp range tend to cost more per kWp.

Factors influencing installation costs

Several factors contribute to the overall cost:

• System size: Larger systems generally have a lower cost per kilowatt (kW) due to economies of scale.
• Panel quality and type: Higher efficiency panels may cost more initially but can offer better long-term performance.
• Roof type and condition: Complex roof structures, older buildings requiring structural reinforcement, or specialist handling for materials like asbestos can increase costs.
• Inverter technology: Different inverter types (string, central, microinverters) come with varying costs and benefits.
• grid connection: Systems exporting above 3.68kW per phase (or 11.04kW total for three-phase) often require a G99 application to the Distribution Network Operator (DNO), adding to the timeline and potential costs.
• Ancillary equipment: Costs for battery storage, monitoring systems, or grid upgrades can also impact the total investment.

Calculating your payback period and ROI

A well-designed commercial solar system typically achieves a payback period of 3 to 10 years. This timeframe can be shorter for energy-intensive businesses or those with high self-consumption rates. After the initial investment is recouped, the electricity generated is essentially free, leading to significant long-term savings and a strong return on investment (ROI) over the system's 25+ year lifespan.

UK grants and financial incentives for commercial solar

The UK government offers various financial incentives to encourage businesses to invest in solar PV systems, significantly reducing the effective capital outlay.

Capital allowances and tax relief

One of the most impactful incentives is the ability to claim 100% first-year capital allowances on qualifying plant and machinery, which includes solar PV systems, through the Annual Investment Allowance (AIA). This means businesses can deduct the full value of their solar installation from their taxable profits in the year of purchase, up to an AIA limit of £1 million per accounting period. This immediate tax relief substantially lowers the effective cost of the investment, making solar a more attractive option.

Local authority support and loans

Beyond national schemes, some local authorities may offer grants, loans, or other support programmes for businesses investing in renewable energy. It is advisable to check with your local council for any regional incentives that could further reduce costs.

Other potential funding opportunities

Businesses may also explore options such as Power Purchase Agreements (PPAs), where a third party funds, installs, and maintains the solar system, selling the generated electricity back to the business at a reduced rate. While not a direct grant, PPAs can eliminate upfront capital costs.

The commercial solar panel installation process

Installing a commercial solar PV system involves several key stages, from initial assessment to ongoing maintenance.

Site assessment and design

The process begins with a thorough site assessment to evaluate your business's energy consumption patterns and the suitability of your premises (typically roof space) for solar panels. This includes assessing structural integrity, shading, and optimal panel placement for maximum sunlight exposure. A detailed system design is then developed to meet your specific energy needs.

Permitting and approvals

Planning permission requirements for commercial solar installations vary based on the size, location, and type of building. Rooftop installations below a certain scale often fall under permitted development rights, simplifying the approval process. However, larger systems or those in sensitive areas may require full planning consent. Your installer should guide you through this. Additionally, for systems exporting above 3.68kW per phase, a G99 application to your DNO is mandatory and must be approved before connection.

Installation and commissioning

Once approvals are in place, the installation team will mount the panels, install inverters, and connect the system to your electrical infrastructure. After installation, the system undergoes rigorous testing and commissioning to ensure it operates safely and efficiently, ready to generate electricity.

Maintenance and monitoring

Commercial solar panels are designed for durability, with most systems lasting 25 to 30 years. Regular monitoring of system performance is essential to ensure optimal output. While maintenance requirements are generally low, periodic cleaning and checks of components like inverters (which typically have a shorter lifespan of 10-15 years) are recommended.

Selling excess electricity: the Smart Export Guarantee (SEG)

Businesses that generate more electricity than they consume can earn revenue by selling their surplus power back to the grid through the Smart Export Guarantee (SEG).

How SEG works for businesses

The SEG mandates licensed electricity suppliers to offer tariffs for small-scale low-carbon electricity generation exported to the grid. Launched in January 2020, it replaced the Feed-in Tariff scheme. If your business has an eligible renewable energy system (such as solar PV) and a smart meter capable of providing half-hourly export readings, you can get paid for every unit of electricity you feed back into the grid. Your system must also be certified under the Microgeneration Certification Scheme (MCS) or an equivalent standard.

Maximising your export revenue

To maximise earnings from SEG, ensure your system is appropriately sized to generate surplus electricity, especially during periods when your business's consumption is lower. Keeping your system well-maintained will also ensure optimal generation.

Navigating SEG tariffs

Energy suppliers have the flexibility to determine the terms and rates of their SEG tariffs, which can be either fixed or variable. It is advisable to compare different suppliers' offerings to find the most competitive tariff for your business. Your SEG supplier does not necessarily have to be the same company that supplies your imported electricity.

Choosing the right commercial solar panel installer

Selecting an accredited and experienced installer is paramount to the success and longevity of your commercial solar project.

Key accreditation and experience

Look for installers with relevant industry accreditations, such as the MCS. MCS certification ensures that the products and installers meet high quality and safety standards. While not legally required for installation, MCS certification is essential for customers to access SEG payments. Experience in commercial-scale projects is also crucial, as these differ significantly from residential installations.

Requesting and comparing quotes

Obtain detailed quotes from several accredited installers. These quotes should include a breakdown of costs, estimated generation, payback periods, and warranties. Be wary of installers who provide generic sales pitches without specific data or a thorough site assessment.

Long-term support and warranties

A reputable installer will offer comprehensive warranties covering both the solar panels (product and performance) and the installation workmanship. They should also provide ongoing support and maintenance services to ensure your system continues to perform optimally for its entire lifespan.