Bifacial Solar Panels - Do They Work in the UK? (2026)

Bifacial solar panels are becoming increasingly popular in the UK. These panels don’t just capture sunlight from the front like traditional ones, they use reflected light from the back to generate extra power. It sounds impressive, but the question is if they actually live up to their promise, especially in the UK.

With our mix of cloudy skies, short winter days and moderate sunshine, it’s fair to wonder whether bifacial panels can perform well here. The truth is, while they can produce more energy in the right conditions, how much benefit you’ll see depends on factors like where you install them and how much sunlight your property gets year-round.

In this article, we’ll take a closer look at how bifacial solar panels work, how they stack up against traditional ones, and ultimately help you decide whether they’re worth it for your home.

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What Are Bifacial Solar Panels?

As the name suggests, bifacial solar panels are designed to absorb light from both sides. While the front side collects direct sunlight, the back side captures reflected light bouncing off surfaces like rooftops, grass or even light-coloured gravel.

This dual-sided design means bifacial panels can produce more energy than traditional ones under the right conditions. They’re built with transparent backsheets or glass on both sides, allowing sunlight to pass through and reflect back onto the rear cells.

It’s a simple yet clever improvement that makes them especially efficient in open spaces where there’s lots of reflected light. For example, commercial roofs, solar farms or even homes with reflective surroundings.

For a homeowner, that means potentially more clean energy from the same amount of space. Although their performance depends on installation setup and surface type (we'll dive more into this later), bifacial panels offer a glimpse into the next generation of solar innovation.

How Do Bifacial Solar Panels Work?

The main difference between traditional solar panels and bifacial panels is that the latter are built to capture sunlight from both the front and the back. This clever design means they can make use of light that reflects off the ground or nearby surfaces, producing more electricity overall.

The front side works just like a traditional solar panel. It absorbs direct sunlight and converts it into electricity through photovoltaic (PV) cells. The back side, however, makes use of indirect light which is sunlight bouncing off surfaces like concrete, grass, sand or even snow. The more reflective the surface beneath your panels, the more energy the rear side can generate.

Because of this, bifacial panels are often elevated slightly above the roof or ground to allow light to pass underneath and reflect back up. They’re also made with glass or transparent backsheets instead of the opaque backing found on regular panels, allowing sunlight to reach the rear PV cells.

Ultimately, the result is a more efficient system that can boost your total energy output, especially in environments with strong reflected light or bright surroundings.

In summary, here’s how they work:

1. Sunlight hits the front surface and is converted into electricity using photovoltaic cells.
2. Some sunlight passes through or around the panel and bounces off the ground or nearby surfaces.
3. The rear side absorbs this reflected light and turns it into extra energy.
4. The total output from both sides is combined and fed into your solar inverter, supplying power to your home.

Pros and Cons of Bifacial Solar Panels

Before deciding whether bifacial solar panels are right for your home, it’s important to understand both the advantages and potential downsides. Like any solar technology, they come with unique strengths that can boost performance, but also with certain limitations you’ll want to consider.

Let’s take a closer look at the main pros and cons below:

Benefits of Bifacial Solar Panels

• Higher energy output: Since they capture sunlight from both sides, bifacial panels, in some cases, can generate up to 30% more electricity than traditional panels, depending on the installation setup and surface reflectivity.

• Greater efficiency in varied conditions: Even on cloudy days or when indirect light is stronger than direct sunlight, bifacial panels can continue producing solid energy levels.

• Durable double-glass design: Many bifacial models use glass on both sides, which makes them more resistant to weathering, corrosion and microcracks, improving their lifespan.

• Better long-term return: Although they cost more upfront, the extra energy they generate can lead to faster payback and lower overall electricity bills in the long run.

• Visually appealing: Their transparent design often gives a sleek, modern appearance that blends well with newer roof styles or open-frame ground-mounted systems.

Drawbacks of Bifacial Solar Panels

• Higher installation cost: The panels themselves are more expensive, and they often require specialised mounting systems or spacing to perform at their best.

• Less effective on dark or shaded surfaces: If your panels are mounted close to a dark roof surface or in shaded areas, the rear side won’t absorb much reflected light, reducing the potential gain.

• Heavier and harder to handle: Double-glass panels can be heavier than standard models, making installation slightly more complex.

• Limited benefit in certain home setups: For smaller or shaded roofs, standard monofacial panels may actually deliver better value for money.

Best Places to Install Bifacial Solar Panels

To get the most out of bifacial solar panels, it's important to install them in the right place. Since these panels capture sunlight from both sides, their efficiency depends heavily on how much light can reach the front and reflect onto the back. Therefore, choosing the right location can make a big difference to your overall energy output.

Let’s look at some of the best places to install bifacial solar panels for maximum performance:

On Flat or Light-Coloured Roofs

If your home has a flat or gently sloped roof, it’s an excellent place to install bifacial solar panels. The panels can be angled to catch sunlight throughout the day, while the roof’s surface can act as a reflector, especially if it’s light in colour or made of materials like concrete, metal or white membrane. This helps the rear side of the panels capture more light, boosting overall power generation.

Ground-Mounted Solar Systems

Ground-mounted installations are perfect for bifacial panels because you can easily control the height and tilt to optimise sunlight exposure. When placed above reflective surfaces like gravel, pale soil or even short grass, the panels can absorb light from underneath, increasing efficiency. They also stay cooler at ground level which can slightly improve performance compared to roof-mounted systems.

Solar Carports and Canopies

If you have a driveway or outdoor carport, installing bifacial panels as a canopy structure is a smart dual-purpose solution. They generate clean energy while providing shade for vehicles. Because carports are often built over reflective surfaces like tarmac or concrete, the rear side of the panels benefits from extra light reflection, improving energy yield without taking up extra garden space.

Commercial and Industrial Roofs

Large, open rooftops on warehouses, offices or factories are also ideal settings. These areas usually have plenty of space for optimal panel spacing and elevation, ensuring good airflow and reflected light beneath the panels. The higher energy generation can make a noticeable difference to large-scale operations looking to cut electricity costs or reduce carbon footprints.

Factors That Affect Bifacial Solar Panel Efficiency

Even though bifacial solar panels are designed to generate more power than traditional ones, their actual performance depends on several key factors.

Everything from the type of surface underneath to the way your panels are positioned can influence how much extra energy they produce. Understanding these factors helps you get the most out of your investment and ensures your panels perform at their best year-round:

Here are the main factors that affect bifacial solar panel efficiency:

• Panel height: The higher your panels are mounted above the ground, the better the rear side can capture reflected light. A bit of extra clearance allows sunlight to bounce underneath, improving output.

• Surface reflectivity (albedo): Light-coloured or reflective surfaces, such as concrete, gravel or white roofing, help boost performance by bouncing sunlight onto the rear side of the panels. Dark surfaces absorb light instead, reducing efficiency.

• Tilt angle and orientation: The angle and direction your panels face play a big role. Ideally, they should be oriented to maximise sun exposure on both sides throughout the day. A slight tilt also helps with drainage and airflow.

• Shading: Shadows from trees, chimneys or nearby buildings can block sunlight and lower the amount of reflected light reaching the back of the panels. Keep the installation area as open as possible.

• Location and climate: Bifacial panels perform best in open, sunny areas with minimal shading. In the UK, southern regions with more consistent sunlight tend to see slightly higher returns than northern areas.

• Mounting structure: Using a tilted or elevated frame allows for better airflow and reflection underneath, which can increase energy capture and help the panels stay cooler, improving efficiency.

If you’re ready to get the most out of your solar setup, it’s worth working with one of the best solar panel installers in the UK - Glow Green. We'll assess your roof type, location and layout to ensure your bifacial panels deliver maximum efficiency and savings.

Popular Bifacial Solar Panels

One of the most impressive options currently available in the UK is the Perlight 515W bifacial module. This high-performance panel is designed to squeeze every bit of energy from the sunlight it captures. With an efficiency of up to 25%, it’s among the most powerful bifacial solar panels you can install on your home today.

Thanks to its advanced dual-glass design, the Perlight 515W module can produce up to 10% more electricity than standard panels. That extra energy translates directly into around 10% more savings on your electricity bills, helping you reach your return on investment much faster.

Whether you’re looking to future-proof your home or simply reduce your energy costs, this panel delivers both top-tier performance and reliability. Its strong build quality, sleek design and higher energy yield make it a great fit for people who want the best from their solar setup.

At Glow Green, we’re proud to offer the Perlight 515W bifacial module as part of our premium solar range, giving you access to one of the best solar panel efficiencies available in the UK.

If you’re ready to upgrade to next-generation solar technology, get a free solar quote today and discover how much you could save.

Are Bifacial Solar Panels Worth It?

Bifacial solar panels are absolutely worth it if you’re looking to get more energy and long-term savings from your solar investment. In the right conditions, that extra efficiency can make a real difference to your energy bills and overall return on investment.

By using reflected light from surfaces like concrete, gravel or even light-coloured roofs, bifacial panels can produce up to 30% more electricity than standard panels. Over time, that additional generation means you’ll rely less on the grid, saving even more on your monthly energy costs. For people with open, sunny spaces or reflective surroundings, the performance advantage is clear.

However, bifacial solar panels might not be worth it in every situation. If your roof is small, shaded or made from dark materials that absorb rather than reflect light, the rear side of the panels won’t generate much additional power.

Similarly, if your property doesn’t allow for elevated installation or the panels need to sit flat against a roof, their efficiency advantage is reduced. In these cases, traditional monofacial panels may actually offer better value for money and a quicker payback period.

While they do come with a slightly higher upfront solar panel cost, the increased efficiency, durability and faster payback period make them a smart long-term choice. It's also worth mentioning that bifacial solar panels are built with hardy double-glass designs that can withstand tough weather, so you’ll benefit from reliable performance for decades.

Ultimately, bifacial solar panels are well worth considering, especially when installed by a trusted installer, like Glow Green, who can ensure they’re positioned for the best possible efficiency.

Bifacial Solar Panels FAQs