Transitioning to solar energy is not only environmentally beneficial but also economically advantageous. With the increasing unreliability of traditional on-grid electricity, more businesses are turning to solar power as a sustainable and cost-effective alternative. Over time, the initial investment in a solar photovoltaic (PV) system can be offset by savings on utility bills, making it a prudent financial decision.
However, with the rapid advancements in solar technology, it’s essential to stay informed about the most current options available. Here, we help you navigate the complexities of selecting the right commercial solar panels for your project, ensuring your investment delivers optimal returns.
Preferred types of solar panels for businesses
While various types of solar panels have been available in the past, the industry has largely shifted towards monocrystalline panels due to their superior efficiency and cost-effectiveness. Polycrystalline panels, once a common alternative, are now difficult to find and rarely used, while thin-film panels are typically avoided due to their lower efficiency and higher costs.
Monocrystalline panels
Monocrystalline panels are currently the most popular choice for both domestic and commercial installations, and can be black or silver-framed. Made from a single crystal structure, these panels are known for their high efficiency and durability. They are available in a range of outputs, typically between 400 watts to 660 watts per panel.
- Commercial use: In commercial installations, larger panels, with outputs up to 660 watts and dimensions around 2.3m in length x 1.3m in width, are generally more cost-effective but less focused on aesthetics. The size of the panel is often chosen based on the specific array layout on the roof. In some cases, using smaller panels with lower outputs can be more practical, allowing for a higher overall system output.
- Domestic use: For residential installations, all-black monocrystalline panels are often preferred for their sleek appearance. These panels usually max out at 460 watts and feature a black backsheet to enhance aesthetics, making them an ideal choice for homes where visual appeal is a priority. As the technology advances, so too does the maximum output of each individual panel. Increases can be seen several times throughout a given year, delivered either through technological advances or through small panel size increases.
Key considerations
When choosing solar panels for your business, there are several crucial factors to bear in mind:
Efficiency
When evaluating solar panels for commercial buildings, efficiency – the amount of sunlight a panel can convert into usable electricity per square metre – remains a critical consideration. Panels with efficiency rates of 20% or higher are considered top-tier in the market.
Efficiency is especially important if your business has limited roof space, and the layout will need to be factored into the selection process too. For example, rather than simply selecting the largest panel possible, using several smaller panels with lower outputs may allow for more panels to be accommodated, resulting in a higher system output overall.
Durability
Solar panels are a long-term investment, with an expected lifespan of 25 years or more. It’s important to select panels that are built to withstand various weather conditions and come with robust warranties. Look for panels that offer a 25-year warranty covering both performance and a minimum of 12 years against product defects to ensure your investment is protected.
Manufacturer reputation
Not all monocrystalline panels are created equal. When considering the best industrial solar panels, several brands are reputed for their high-efficiency panels, robust construction, and extensive warranties. Choosing among well-renowned brands ensures businesses receive reliable solar solutions that deliver outstanding performance and durability for many years.
Industrial solar panels: top picks
With so much to bear in mind when selecting your commercial solar panels, we’ve highlighted some of the stand-out choices based on different factors.
If warranty is the primary deciding factor:
REC Alpha Pure – RX Series 460 watt Black Frame
With an impressive 460W power output and 22.6% efficiency, these panels are engineered for high performance in limited space. At £166 per panel, the REC panel does command strong money, but for some the balance between higher cost and overall added value will be worth it. What truly sets them apart is the extensive warranty – far exceeding the industry standard. At 25 years for both product and performance, this REC panel provides peace of mind for the long term. Production is carried out in their state of the art, energy-efficient facility in Singapore. With a highly-automated production process, they can deliver improved efficiency and reliability. This leads to one of the industry’s most consistently low warranty claim rates.
If warranty is balanced with cost:
JA Solar 525 watt Mono PERC Half Cell MBB LB Traceable silver frame MC4
The JA 525 watt module delivers a great balance between cost, superior efficiency at 22.4%, and an extended warranty. With 12 years against manufacturer defects and a huge 30 years linear power output warranty, the JA 525 delivers across the board. To top it off, the cost is just £84 per panel, giving you a huge bang for your buck! Backed by the second largest solar manufacturer in the world, you can rest assured that you have the support you need in the unlikely event a panel should fail.
If sustainability is the primary deciding factor:
Meyer Burger White 390 watt
With a power output of 390 watts, the Meyer Burger White is a little below the average output of a commercial panel but ranks highly for its efficiency – delivering 21.2% for this particular module. The Meyer Burger White costs £163 per panel, so buyers must carefully balance cost against their sustainability requirements. Meyer Burger modules are especially climate-friendly because they produce more emission-free energy and for a longer period of time. They’re manufactured in accordance with the strictest environmental standards without using lead, using fewer solvents and made in production facilities powered with energy from renewable resources. They’ll also recycle end-of-life modules as completely as possible. What’s more, these panels come with an impressive warranty – 25 years against both product defects and guaranteed power output. To top this all off, they are designed in Switzerland and manufactured in Germany, meaning less miles travelled from the production facility to your roof.
If sustainability is balanced with cost:
Canadian Solar 660 watt Super High Power Bifacial Mono PERC BiHiKU7
With a power output of 660W, 21.2% efficiency and priced at just £93 per panel, this Canadian Solar module packs a punch with high output and decent efficiency. Since 2001, Canadian Solar has been on a mission to “foster sustainable development and create a better, cleaner earth for future generations” by delivering solar-powered electricity to millions worldwide. With over 75 gigawatts (GW) of solar modules shipped and a project pipeline of 26 GW, Canadian Solar is a major global player in the solar industry. In addition to providing energy solutions that reduce emissions, they’re committed to operating their business sustainably.
The Ontario-based company has significantly reduced its environmental impact, cutting greenhouse gas (GHG) emissions by 17%, energy intensity by 18%, water usage by 53%, and waste intensity by 36% between 2017 and 2021. Furthermore, Canadian Solar aims to power all global operations with 100% renewable energy by 2030.
To hold themselves accountable, Canadian Solar adheres to environmental, social, and governance (ESG) goals and aligns with the United Nations’ Sustainable Development Goals (SDGs), implementing initiatives such as donating solar modules to support global sustainability efforts.
Highest efficiency:
Aiko Comet 1N 625 watt N-Type ABC 72 Cell Silver Frame Gen 2
With a 23.7% efficiency rating and a degradation rate from year two of just 0.35% per year, this is a highly efficient option. Though a little more expensive per watt at around £104 per panel when compared with other similarly rated panels on the market, its high efficiency means fewer panels are needed to meet energy demands. The standard 15-year warranty against manufacturing defects and 30 year performance warranty make it a highly attractive commercial option. Aiko is the third largest manufacturer of solar panels in the world. This panel also offers Cell- level partial shade optimisation (one and only in the industry), further enhancing the delivery of energy from your roof and into your business.
Highest power output:
Canadian Solar 660 watt Super High Power Bifacial Mono PERC BiHiKU7
Boasting a 660W power output, this panel is ideal for those needing maximum energy production where there’s plenty of roof area to play with. While its efficiency is 21.2%, slightly lower than others, its robust design, up to 50% lower degradation and better shading tolerance make it a great option for large scale solar plants. Priced around £92 per panel, it’s a cost-effective option for high-output needs, though its shorter 12-year product warranty may be a drawback for those seeking long-term assurance.
Making an informed decision
When choosing solar panels for business premises, it’s crucial to consider your specific energy needs, roof space, and budget. High-efficiency panels might come at a higher initial cost, but they offer greater long-term savings and are ideal for companies with limited installation space. On the other hand, panels with lower efficiency but excellent durability and affordability might be suitable for larger installations with more available space.
At Purelec Energy, we provide expert advice tailored to your business’s unique requirements. Get in touch and our team can guide you through the selection process, before undertaking the commercial solar panel installation.