More and more businesses across the UK are investing in commercial solar panels – and it’s not difficult to understand why. As the cost of electricity continues to fluctuate and sustainability becomes a greater priority for companies of all sizes, solar energy has shifted from a niche alternative to a mainstream business decision. But for those exploring this option for the first time, it’s normal to have questions: about price, viability, system size, planning permission, and long-term return. That’s where we come in.

Our experience with medium to large-scale commercial solar installations – across industrial, agricultural, and commercial sectors – has shown us that it’s not just the panels themselves that matter, but the quality of the planning, installation, and ongoing support. We don’t just fit panels and walk away. Our team is known for delivering turnkey projects, providing reliable aftersales care, and designing bespoke solutions tailored to each business we work with. If you’re weighing up your options, here’s what you really need to know.

Are Commercial Solar Panels Worth It?

This is the first – and most important – question we get asked. And in our experience, the answer is overwhelmingly yes. Commercial solar panels offer tangible, long-term benefits for businesses, including reduced electricity bills, increased energy independence, and improved environmental credentials. For businesses operating during daylight hours, the match between solar generation and usage can be ideal, maximising savings.

Beyond cost savings, solar also demonstrates a business’s commitment to sustainability – something increasingly valued by both customers and stakeholders. Over the typical lifespan of 25–30 years, the return on investment can be substantial, especially when energy prices rise.

Understanding Commercial Solar Panel Prices

The cost of installing commercial solar panels depends on several factors, such as the size of the system, the complexity of the installation, and the type of panels used. Larger installations tend to benefit from economies of scale, meaning the cost per kW installed decreases as system size increases. However, prices also reflect quality. Cheaper systems may lead to more maintenance issues or lower efficiency over time.

We always advise businesses to consider not just the upfront commercial solar panel price, but the full life-cycle value. Our containerised and tailored solutions help deliver long-term performance, supported by detailed planning and consultation at the outset.

What Size System Does Your Business Need?

Commercial solar panel size is usually measured in kilowatts (kW) or megawatts (MW), depending on your energy needs. A small business might need a 30kW system, while a manufacturing facility could require 250kW or more. The available roof or ground space, energy usage patterns, and any export options back to the grid all affect system design.

We undertake detailed site assessments and energy usage reviews before making recommendations. Our focus is always on designing a system that balances output with efficiency, rather than just aiming for the largest system possible.

Are Grants Available for Commercial Solar?

There are currently a number of commercial solar panel grants and incentives in the UK. Schemes change from time to time, but many businesses may benefit from tax reliefs, such as the Annual Investment Allowance, or support from local authority-backed initiatives. Some areas also offer funding for energy efficiency improvements that include solar installations.

While grants alone may not cover the full cost, they can make solar more accessible. We always help clients understand what’s available locally and nationally, and assist with any paperwork needed.

Do You Need Planning Permission?

Planning permission for solar panels on commercial buildings is usually not required, provided the panels are not installed on listed buildings or in conservation areas and do not protrude beyond certain limits. However, there are exceptions, particularly for ground-mounted arrays or if the building has specific planning restrictions.

We’re used to managing the planning side of installations and will advise you upfront if permission is required. Our experience with commercial projects means we’re familiar with local planning departments and what’s likely to be approved.

Choosing the Right Installer Matters

Not all commercial solar panel companies offer the same level of service or expertise. When searching for “commercial solar panel installers near me,” it’s important to look beyond location. Experience with complex systems, aftersales support, and integration with other renewable technologies like battery storage are key indicators of a quality installer.

We pride ourselves on being more than just a contractor. As trusted commercial solar panel installers, we support our clients at every stage – from initial design to long-term maintenance. Many of our clients come to us after less satisfactory experiences elsewhere because they want a company that actually understands their industry and delivers on promises.

Maintenance: Keeping Your System Performing

Commercial solar panel maintenance is often overlooked, but it plays a vital role in ensuring consistent performance. While solar panels have no moving parts and generally require little attention, regular checks and cleaning help prevent avoidable issues like dirt build-up or electrical faults.

We offer maintenance packages as part of our aftercare, ensuring clients get the best performance out of their systems year after year. This proactive approach not only protects your investment but ensures your energy savings are never compromised.

Lifespan and Long-Term Value

So, how long do commercial solar panels last? Most systems are expected to perform for 25–30 years or more. Even after that, while efficiency may drop slightly, panels can still generate useful energy. Inverters and batteries may need replacement during this period, but these are relatively minor compared to the initial system cost.

The long-term value isn’t just financial. Solar adds resilience to your business, reduces exposure to volatile energy markets, and contributes to your sustainability goals. With our support, clients can track system performance and see the payback period unfold in real figures.

If you’re thinking seriously about installing solar panels on a commercial building, it’s worth choosing a team that understands every aspect – from funding to installation, maintenance, and future-proofing. Get in touch with Thompson Renewables to learn more about our commercial services and explore how we’ve helped other businesses take control of their energy future.