Frequently Asked Questions

Solar panels use photovoltaic (PV) cells, typically made from silicon, to convert daylight into electricity. When sunlight hits the panel, it energises electrons within the cells, creating a flow of direct current (DC) electricity. An inverter then converts this into alternating current (AC) electricity, which powers your building, equipment and operations. Discover more about this renewable energy source.

Commercial solar panels reduce electricity costs, protect your organisation from rising energy prices, and lower your carbon emissions. By generating renewable electricity on-site, you gain greater control over energy use while strengthening your sustainability credentials.

Solar PV delivers measurable benefits across industries including Poultry Farms, Plastic Manufacturers, Food & Beverage Manufacturers, Agriculture and more.

Most commercial solar PV installations are completed within 3–6 months, depending on system size, grid approvals and planning requirements.

Timelines may extend where projects involve additional technical or regulatory considerations, such as G99 grid studies, network reinforcement works, planning permission (particularly for ground-mounted systems), structural roof upgrades, or export limitations requiring transformer upgrades.

Each project is assessed individually to ensure realistic delivery timescales and a smooth route to commissioning.

Solar power is suitable for most UK businesses with sufficient roof space or available land and daytime electricity demand. If your organisation operates manufacturing equipment, refrigeration, ventilation systems, EV charging or other energy-intensive processes, solar PV can significantly reduce grid reliance and operating costs.

Businesses with high daytime usage typically achieve the strongest return on investment, as more of the electricity generated is used on-site. A professional feasibility assessment will evaluate your energy profile, site suitability, grid connection capacity and projected payback period, providing a clear, data-led view of whether solar is the right strategic fit for your business.

Businesses use a lot of energy day to day and solar can help reduce electricity bills by generating your own power. Over time, these savings can make a real difference to your operating costs. By addressing common challenges and implementing energy saving solutions it can help you improve sustainability while lowering overheads. Learn how warehouses reduce energy used. Learn more about the financial solutions available for solar installations, including PPAs which don’t require any upfront investment.

Solar is suitable for a wide range of businesses, particularly those with high energy usage and available roof or land space. This includes, Agricultural, Commercial & Industrial, Factories & Manufacturing, Food & Beverage, M&E and Building Contractors and Warehouse and Distribution.

There is not a one-size-fits-all answer, as it depends on system size, layout and site conditions. As a guide, a 1MW solar array typically requires around four to five acres, though this varies by site.

Each site is designed individually to maximise energy generation while using land efficiently. Options such as private wire or direct wire installations can also improve returns by supplying power directly to nearby businesses.

Solar panels require space, whether it be on your roof or on your land. The amount of space needed depends on your energy usage and the size of the system required. It’s important to know, as your business grows your commercial solar panel system can be expanded to meet increasing energy demands. Once you’ve used all available roof space, nearby land can be utilised to expand your solar system.

Although full Planning Permission isn’t required for Commercial Solar, it is still a legal requirement for organisations to obtain Approval under Permitted Development Rights from their local authority. There are numerous conditions that need to be complied with in order to pass the Class J assessment, which forms part of the application for Permitted Development Rights Approval. Although this may seem complex, Noble Green Energy can support clients with this through our partner relationships. 

On average, the life expectancy of commercial solar panels is between 25-30 years. However, after this time, solar panels don’t just simply stop working. Their output gradually starts to decline over time at around 0.5% per year. A good Operation & Maintenance contract can ensure your solar panels continue operating at their optimum year after year.

A commercial solar PV project typically includes initial consultation, feasibility assessment and site survey, followed by grid connection applications and detailed system design. Where required, planning permission and financial agreements are secured before procurement, installation and commissioning take place. Once operational, ongoing monitoring and Operation & Maintenance (O&M) ensure long-term performance and return on investment.

At Noble Green Energy, we manage every stage, from consultancy and planning through to installation and aftercare, delivering a seamless transition to on-site renewable energy.

In a commercial solar PV project, some connection works must be carried out by the Distribution Network Operator (DNO), while others can be completed by approved third parties.

Non-contestable works must be carried out by the DNO or their appointed agents – typically those that involve direct interaction with the DNO’s network.

Contestable works refers to connection work that can be undertaken by an approved contractor, an Independent Connection Provider (ICP), an Independent Distribution Network Operator (IDNO) or the customer themselves. This may include trench digging, duct installation, cabinet plinths and erection, and cable-laying.

As part of our Solar PV Consultancy & Project Management service, Noble Green Energy can manage contestable works to DNO standards, helping avoid delays, rework and added costs.

Private-wire (or direct-wire) solar refers to solar energy generated on one site, such as a field, open land or even a rooftop, and delivered directly to a nearby end-user via private cable infrastructure, bypassing the National Grid.

Noble Green Energy delivers private-wire systems for UK businesses, helping landowners secure long-term agreements with energy-intensive end users and maximise the financial potential of their land. Find out more here.

Roof or land size, the number of solar panels used and, of course, the quality of the system components, all dictate how much it costs to install solar PV. Discover how to determine the ideal system size for your site. There are also cost effective ways to benefit from solar energy without the upfront investment, such as a Power Purchase Agreement.

There are finance solutions available to help you make the transition to renewable energy seamless and affordable, including Power Purchases Agreements (PPA), Asset Finance, and Hire Purchase. They are each designed to help you achieve your sustainability goals while optimising cash flow. There are also various tax incentives available to support commercial solar panel installations.

A Power Purchase Agreement (PPA) removes the need for any upfront costs of your solar PV system installation and maintenance. The developer you choose to use for the design and installation of your solar PV system will also finance the project either directly or via a third-party fund. Meaning they will have ownership of the system for the duration of the PPA and take responsibility for maintenance, insurance and any performance risks.

Solar panels are built to be durable and low maintenance, but even the best commercial systems need regular care to perform at their best. Routine maintenance helps maintain strong energy output and can also extend the life of your system.

A solar PV Operation & Maintenance (O&M) contract ensures your system continues to operate safely, efficiently and at peak performance. This typically includes remote monitoring with automatic fault alerts, so issues can be identified and resolved quickly, often before they impact generation.

It also covers regular performance reporting, annual on-site inspections by qualified engineers, and management of warranty replacements where required. The result is long-term system reliability, protected return on investment, and complete peace of mind for your business.

Commercial solar systems usually include more than one type of warranty, most commonly a performance (power output) warranty and a product (manufacturer’s) warranty. Together, these protect both the system’s long-term energy production and the quality of the equipment itself. At Noble Green Energy, we typically select manufacturers offering some of the longest warranty periods in the solar industry.   Learn more about how these warranties work and what they cover.

When choosing solar panels for your business, there are a number of decisions to make and consider, including which module manufacturer is best.

Tier 1 solar panels, produced by established, financially stable manufacturers with proven track records, are rigorously tested for efficiency, durability, and resistance to environmental stress. At Noble Green Energy, we only install the highest quality products from Tier 1 manufacturers, to ensure your system continues to deliver strong output and dependable returns for decades to come. Here are the best solar PV module and inverter manufacturers we recommend.