Monocrystalline vs Polycrystalline solar panels: Which one to choose?

According to gov.uk, as of June 2024, 1.4 million homes in the UK have solar panels. But like many others, do you find yourself torn between monocrystalline vs polycrystalline solar panels?

If you’ve been thinking about going solar, it’s going to be helpful to understand the key differences between two of the most popular types of advantages. Both solar panel types indeed have their own advantage points, but which is going to be the best fit for your home?

When it comes down to it, monocrystalline panels are incredibly efficient. They have that sleek black look that gives them that ultra-premium feel that comes at a higher cost. On the other hand though, polycrystalline panels are friendlier on the wallet. However, they’re not quite as energy efficient. In any case, how do you figure out the right one for you?

On this page, you’ll learn:

• The main differences between monocrystalline and polycrystalline panels.
• The pros and cons of each solar panel, including efficiency, cost, and durability.
• How to decide which type of solar panel is right for you, based on your budget, location, and energy needs.

Our goal with this post is to provide you with the information you need to have a much clearer picture so that you can decide once and for all whether mono panels or poly solar panels are going to be the right investment for your solar PV system.

So, without further ado, let’s dive in!

Monocrystalline solar cells at a glance

So, when we dissect mono solar panels, we’ll find out that they’re created from a single, pure silicon crystal that is cut into thin slices. These thin slices are called wafers. Monocrystalline wafers are formed into a cylindrical silicon ingot. The monocrystalline cells are black with smooth, rounded edges.

Because of how mono panels are made, they’re really good at absorbing the sun’s rays and turning them into electricity. They’re much more efficient than other types of panels, especially more efficient than thin film solar panels, for instance.

Below, is a quick look at the pros and cons of monocrystalline solar panels:

Pros:

• ✅ Higher efficiency: Monocrystalline solar panels turn more of the sun’s rays into electricity, giving you more power.
• ✅ Space-saving: You need fewer panels to generate the same amount of energy.
• ✅ Long lifespan: Typically monocrystalline solar panels last for over 25 years.
• ✅ Great in low light: Monocrystalline solar panels tend to be perfect for areas with cloudy weather, like the UK.
• ✅ Sleek design: Their black, modern look adds a nice touch to rooftops.

Cons:

• ❌ Higher cost:  Due to the complex manufacturing process, they come with a higher upfront price.

At Soly, we offer high-quality monocrystalline solar panels, such as those from Jinko Solar, that are designed to offer superior performance and long-term energy savings.

 

Polycrystalline solar cells at a glance

When we pick apart the polycrystalline solar cells, we’ll soon find out that the poly panels are made a bit differently than monocrystalline panels. Polycrystalline solar panels are made by melting multiple pieces together (called multi-crystalline or many crystal silicon) and forming them into square-shaped slices that are also called wafers. The polycrystalline cells are blue with a square, speckled design.

The process to make polycrystalline solar panels is much faster and cheaper than it is to make mono panels, which is why poly panels are so much more affordable. They also have a noticeable blue colour due to how the silicon pieces reflect sunlight.

Here’s a quick look at the pros and cons of polycrystalline panels:

Pros:

• ✅ Affordable: Polycrystalline panel installations are a more budget-friendly choice.
• ✅ Eco-friendly: The manufacturing process for polycrystalline panels produces less waste.
• ✅ Durable: They can last just as long as monocrystalline panels(with proper upkeep, over 25 years).

Cons:

• ❌ Less efficient: They convert less sunlight into electricity, so you’ll need more panels.
• ❌ Heat-sensitive: Polycrystalline solar panels don’t generally perform too well in hot weather.
• ❌ More space needed: When it comes to monocrystalline vs polycrystalline, you’ll need more roof space for the polycrystalline solar panels to meet your energy needs.

Key differences between monocrystalline and polycrystalline solar panels

When comparing monocrystalline vs. polycrystalline solar panels, there are a few things to keep in mind. We’ve touched on all of these above, but here’s a closer look at each of the key differences between mono panels and poly panels:

Cost:

Monocrystalline solar panels are generally more expensive because of the advanced way they’re made. On average, they cost about £1 per watt, while polycrystalline panels come in a bit cheaper at around £0.90 per watt.

While the difference might not seem huge, it can add up when you’re installing a larger system, like a 5 kWh setup. Plus, since polycrystalline panels are less efficient, you might need more of them to produce the same amount of power, which can drive up the overall cost.

Efficiency:

Monocrystalline panels are highly efficient, usually turning 15% to 24% of the sun’s rays into electricity. This makes them perfect for homes with limited roof space. In comparison, polycrystalline panels offer efficiency between 14% and 16%.

While improvements have been made to boost the performance of polycrystalline panels, they’re still a bit behind. However, if you’ve got plenty of roof space and lots of sunlight, poly panels can still be a solid energy option.

Power and Space:

Thanks to their higher efficiency, monocrystalline solar panels can produce more power with less panels. This makes them the ideal choice for homes with smaller roofs or when you need to get the most energy out of every square metre.

On the other hand, polycrystalline panels need more space to produce the same amount of power. This means you’ll need more of them, which can be a drawback if you’re working with limited roof space.

Lifespan:

Both mono panels and poly panels are very durable and often outlast their warranties. However, monocrystalline panels tend to degrade more slowly and can last anywhere from 30 to 40 years with proper maintenance.

Polycrystalline panels, while still long-lasting, usually degrade a bit faster, with lifespans of around 25 to 35 years. Most panels come with up to 25 year warranties. However, with good care, they can keep working well beyond that, making solar energy a solid long-term investment for homeowners.

Appearance:

In terms of looks, monocrystalline panels are usually the top choice because of their sleek black finish. In fact, this blends quite nicely with most rooftops. Poly panels, however, have a noticeable blue tint that can stand out more.

While this doesn’t affect how they work, some homeowners care about the appearance of their solar setup, and that might play a role in their decision.

Temperature Coefficient

The temperature coefficient measures how well solar panels perform in hot weather. Both panel types are tested at standard temperatures (77°F or 25°C). However, when it gets hotter, efficiency drops.

Monocrystalline panels handle heat better, with a lower temperature coefficient, meaning they lose less efficiency in high temperatures. Polycrystalline panels, on the other hand, have a higher temperature coefficient, so they lose more efficiency in the heat. This makes monocrystalline panels a smarter choice for areas with extreme heat.

 

Monocrystalline vs Polycrystalline: Choosing the right solar panel for your needs

Now that we’ve gone over the finite details, deciding between monocrystalline and polycrystalline solar panels really comes down to a few important factors like your personal preferences, available roof space, and budget. Both types will help reduce your energy bills.

However, the best option for you will really depend on what you’re looking for. Here’s what to keep in mind:

Facts to consider when choosing solar panels

If…	Then…
Financing options are important.	Consider the long-term savings from each type, as monocrystalline may provide better returns despite the higher initial cost.
You’re working with limited space.	Monocrystalline panels are the best choice, producing more electricity in a smaller area.
Your home or installation is in an area with lower sunlight.	Monocrystalline panels are ideal, as they perform better in low-light conditions and have superior heat tolerance.
You’re considering a residential installation with restricted roof space.	Monocrystalline panels are a better fit.
Keeping costs low is your top priority.	Polycrystalline panels offer better value while still providing solid performance.
You have ample roof space and live in an area with abundant sunlight.	Polycrystalline panels are the best option, as they require more space but still deliver good output in sunny conditions.
You’re installing solar panels on a commercial property and need an effective solution for large installations.	Monocrystalline panels are a better fit. Their high efficiency and long lifespan make them perfect for maximizing energy output in commercial settings, especially for companies looking for a sustainable and cost-effective solution over time.

Solar Financing & Long-Term Savings

The way you finance your solar system can play a big role in the type of panels you choose. At Soly, we offer flexible options through Ideal4Finance, which is our highly-rated financing partner that can help you spread the cost for solar.

We’ve also added new options where you can pay £500 and defer the rest until your system is up and running. If you’re focused on long-term savings, monocrystalline panels might be worth the higher upfront cost because of their better efficiency. They produce more electricity from the same amount of sunlight, which can lead to lower energy bills over time. This makes them quite the savvy choice financially for homeowners.

FAQ

Which is better, monocrystalline or polycrystalline?

Monocrystalline panels are usually seen as the better option for solar cells because they’re more efficient, last longer, and perform better in low-light conditions. That said, polycrystalline solar panels tend to be more affordable and can still do a great job if you have enough roof space.

What are the disadvantages of monocrystalline panels?

The biggest drawback of monocrystalline panels is their higher upfront cost compared to polycrystalline panels. This price difference can be a challenge for homeowners on a tight budget, though the long-term savings on energy bills may help balance out the initial expense.

Which lasts longer monocrystalline or polycrystalline?

Both types of panels are very durable and can last 25 to 30 years or more. However, monocrystalline panels tend to degrade more slowly, so they might last a bit longer if conditions are just right.

Why are polycrystalline solar panels better?

They’re only better if you need a more affordable solution, where you have plenty of roof space and live in a location that stays sunny a great deal of the time.

The bottom line: monocrystalline or polycrystalline solar panels?

As a homeowner, it’s essential to understand that both monocrystalline and polycrystalline solar panels have their own advantages, and the right choice really comes down to your individual needs. Mono solar panels are ideal if you have limited roof space, need more energy, or want a sleeker design. Polycrystalline panels, on the other hand, are perfect if you’re focused on saving money and have enough space for more panels.

By understanding the key differences between monocrystalline and polycrystalline panels while also focusing on what’s most important to you, you can choose the best option for your energy needs and budget.

No matter which type of panel you choose, when it comes to monocrystalline vs polycrystalline, both help support a more sustainable future by reducing reliance on traditional energy sources.

Why choose Soly?

At Soly, we make solar energy easy and accessible for everyone. Here’s why we’re the go-to choice for solar installations in the UK:

• We exclusively offer monocrystalline solar panels, typically more efficient and space saving compared to other panel types. So this ensures you get the best performance for your home or business.
• Our panels are provided to you at competitive prices, making high-quality solar energy systems more affordable.
• We’re proud of our 4.7-star TrustPilot rating and 4.8-star rating on Google a reflection of our dedication to excellent service.
• As a certified Which? Trusted Trader, we work with local, reliable installers who are accredited by HIES, TrustMark, and MCS.
• With over 10 years of experience and 35,000+ satisfied customers, we specialise in designing and installing solar systems tailored to your home’s energy needs.
• Our solar panels come with up to 25-year warranties, and our batteries are covered for 15 years, giving you peace of mind with your investment.
• Our easy-to-use online configurator helps you estimate how many solar panels you’ll need, the electricity they’ll produce, and how much you can save on your energy bills.

Get in touch with Soly’s solar experts today to discover the best solar PV system for your home.