✔ Our research team has searched extensively for the most efficient panels
✔ All of these products have an efficiency rating of 22.5% or above
✔ The most efficient solar panel is the AIKO 72-cell N-Type ABC White Hole
As solar panel costs have fallen in recent years, solar panel efficiency has increased at a tremendous pace.
You can now choose from countless panels with more than 22% efficiency, meaning you can generate more electricity from the same amount of sunlight, which reduces your energy bills and carbon footprint.
Through exhaustive research, we’ve identified the most efficient solar panels for you.
You can also find the best solar panels for your home by using our custom-built comparison tool. Simply fill in this free form, and our trusted specialists will be in touch with quotes.
IS
SOLAR
POWER
WORTH
THE
INVESTMENT?
With at least another 4 to 5 billion years of solar energy bombarding the planet daily, harnessing the power of the sun for electricity can be one of the best options for those seeking cleaner energy sources.
While the prospect of cutting down on your monthly energy expenses through the latest developments in solar technologies may seem like a great idea, the initial investment may have you questioning if solar power is really worth it.
To better understand how you, and many others, can directly benefit from an installation of solar energy systems, the efficiency of the panel you choose should be considered, but that does not mean a more efficient panel will translate into better economic benefits for you personally.
A variety of factors including panel placement, geographic location, the architectural design of your roof, temperature, and the amount of shading on your building will determine if upgrading to a solar energy system is right for your business, or home.
Efficiency in solar panels is simply the measurement of energy output in a given surface area. The more efficient a panel is, the less space it will take up on your roof. However, choosing a more efficient solar panel may not always be the most cost-effective decision available.
Depending on location, installation costs will vary. Arizona is one of the leading states in solar energy, and it offers a range of incentives to encourage consumers. The Grand Canyon State is also one of the best states to utilize solar power systems as Yuma is ranked the sunniest city in the country by NOAA.
The more efficient the photovoltaic solar panel, the more energy output it will have per amount of light energy hitting the cell, which will in turn take up less surface area to meet your energy requirements.
Today, most solar panels provide an energy efficiency rating between 11 and 15 percent, which is the percentage of solar energy that is being converted into useable electricity.
While it may seem like a low percentage, advancements in solar energy technologies are continually being made, and modern panels can more than cover the energy requirements of most commercial and residential needs.
Today, researchers are continually trying to improve the efficiency of photovoltaic technology. Scientists have now achieved a record of 40 percent efficiency by utilizing multi junction cells that are tuned to capture different frequencies of light on the electromagnetic spectrum. While these are currently the most efficient solar cells that have been created, they are not yet available to the general public.
If you have a smaller roof and limited space, a more efficient solar panel may be the right choice for you. Because of their higher efficiency, these panels may be slightly more expensive, but they will still meet the energy requirements you need.
However, if you have a larger amount of space, you may be able to achieve your energy needs with less efficient and less expensive panels to help save on your installation costs. Considering the overall cost of the panels and the kilowatt production can help you pick which is best for your installation.
The industry standard for solar electric systems is based on photovoltaic, or PV, technology, which converts sunlight into electricity. Multiple solar cells are interconnected to create a module, which comprises the panel.
Each panel is usually connected together in a system in which electricity is sent to an inverter to provide the power needed to run household electric devices. Efficiency is often dependent on the design of the panel and how it is engineered to capture different frequencies of light energy. Consider the following designs:
Monocrystalline Silicon Panels - The most efficient type of photovoltaic solar panel available today is currently monocrystalline, or single, silicon panel. Because of the higher silicon content used in the design, they are more expensive than alternative types of panels. More energy is converted into electricity, so fewer panels are needed in most roof installations to meet the same power requirements. These types of square-shaped panels are ideal for roof mounted solar electric systems.
Polycrystalline Silicon Panels - With lower amounts of silicon utilized in polycrystalline, or multi-layered, silicon panels, they are often cheaper than their more efficient counterparts. They implement a design to help reduce this efficiency loss, allowing them to be utilized on roof mounted systems. This makes them ideal for larger projects and installations because they cost less. Polycrystalline silicon panels are also resistant more resistant to heat.
Building Integrated Photovoltaic Panels - Appearance is an important aspect of a building. As with many historic buildings, or ones that feature unique architectural designs, owners might be hesitant to alter the distinctive character of a structure by installing a solar electric system. To help mitigate the aesthetic changes that solar panels might bring, building integrated photovoltaics are available. While they may be able to keep the look of traditional roofing, these types of panels are more costly and less efficient than the alternatives.
Thin-Film Solar Cell Technology – Thin film cells are a newer photovoltaic technology that consists of one or multiple layers of thin films of photovoltaic cells that are laminated to existing material, such as metal roofing or glass windows. These photovoltaic films are very thin allowing them to be lighter and more flexible compared to other PV systems. While thin-film technology is extremely versatile, it comes at a cost. Thin-film systems are less efficient and can degrade faster than conventional solar systems, but are improving with technology advancements.
Solar power efficiency depends on a variety of factors including proper installation and assessment of the structure. Hiring a professional to inspect the structural design and location of your building is essential in determining what type of installation will best meet your requirements and provide you with the long-term economic benefits of solar power. Empire Renewable Energy offers a range of services for commercial and residential applications:
Most solar panels are designed with a layer of protective glass over the cells, which sunlight must pass through. The amount of energy harnessed is dependent on the angle in which light is passing through, as well as the reduction of reflectivity of the glass.
Proper installation of a solar panel is significant to capturing the maximum amount of sunlight. The angle of the panel and the amount of light hitting it are both important factors that will help you maximize efficiency.
For roof mounted panels, the slope of the roof will impact how much sunlight is hitting the panels throughout the day. Large commercial installations can compensate for the movement of the Earth by installing solar tracking systems, but due to the expense, they are not typically installed for residential use.
Temperature can impact the overall output of a solar cell. Higher temperatures can reduce output and lower efficiency. Some solar panels are designed for warmer climates, where efficiency must be maintained as temperatures climb. Ensure you select the right panel that is best suited to your climate, so you can enjoy a better return on your investment.
Even a small shaded area on solar panels can greatly reduce their output. Since panels are often wired together in a system, even a small shadow on one panel can drastically reduce the system's overall energy production. It is ideal to install panels in a way that no shadows will fall on any of them. In some situations this may be difficult to avoid, so alternatives are available to help maintain efficiency.
Deciding on the type of installation for your business or home is also essential if you want to get the most out of your investment. As space and architectural designs vary for each customer, there are many options available:
Roof Mount Solar Installation - Roof mount installations are a popular option for both commercial and residential customers. They offer a way to capture the solar energy that naturally hits your rooftop every day.
Pole Mounts Solar Installation - For those with limited roof space, pole mounted systems can be installed, but they require a designated area of land for proper installation.
Ground Mounts Solar Installation - Similar to pole mountings, ground mounted systems are placed in yards and fields. They are useful for those who have limited roof space or own the large amount of land required to maximize the benefits of solar energy systems.
Shelters Solar Installation - For those looking to cut down on energy expenses, alternative outdoor structures such as gazebos and structural awnings can be equipped with solar energy systems.
Parking Lot Canopies Installation - For installations that house large parking areas, solar energy can be harnessed to reduce electricity expenses and provide shade to customers in designated parking areas.
Shade Awnings - For buildings with limited space, replacing traditional awnings with solar panels is a great way to lower monthly energy expenses while still providing the same function.
Detached Garage Solar Installation - For many, roof space and parking space may be limited. Detached garage installations, however, can still provide economic benefits to residences where roof mount installations are not possible.
Building Integrated PV Systems - For some buildings, the historic or general aesthetic is vital to the structure's architectural character. Solar installations that are integrated into the building's design can help minimize changes to the appearance while still providing the benefits of solar energy systems.
In order to provide Arizona residents with the most efficient solar panels on the market, Empire Renewable Energy has partnered with SunPower.
SunPower modules have a 40-year lifespan, and their solar cells offer the best performance on the market with an operating efficiency of up to 24 percent. If you utilize SunPower solar cells, you'll see a faster return on your investment with approximately 20 percent more energy output over similar products.
With some of the highest ratings in the industry, SunPower offers superior performance and longevity when compared to similar sized panels. SunPower also holds the world record for the highest efficiency silicon solar panel.
For the mass majority of business owners and homeowners, solar power is a great option to reduce monthly energy expenses and increase property values.
Arizona offers numerous incentives to those looking to install solar power systems. In addition, the federal government is also encouraging green-energy alternatives and offering tax credits and loans to those looking to upgrade to a solar system.
As the demand for solar energy has increased, the technologies have advanced while the prices have declined drastically since the late 1970s. It is now cheaper than ever before to install a solar energy system for your home or business.
While the initial investment to install a solar electric system will greatly depend on the size of the installation, the overall savings is worth it to most customers.
In addition to reducing monthly expenses, most roof mounted systems are designed for longevity and require very little maintenance.
Inspections should be conducted regularly, especially in colder climates where ice could damage panels. Cleaning may also be required to maintain efficiency, but most solar roofing is designed to last for an average of 25 years.
Questions to ask yourself before installing a solar energy system:
What type of installation would be best suited to my building/property?
What size of system can my roof support?
How much direct sunlight hits my roof daily?
What are my energy requirements?
How much do I spend annually on electricity?
How old is my roof, and will a solar electric system add value to my home or business?
What are the local, state, and federal incentives available?
Does my local energy supplier offer rebates for solar systems?
Hiring a professional to assess your building and property for optimal efficiency is very important.
When performing an installation, support infrastructure and converters need to be installed to safely harness light and transform it into energy that can be used in your business or home.
Panel angle, placement, the building's architectural design, and shade can all impact a solar electric system's efficiency. Empire Renewable Energy offers a free assessment to determine what type of installation is best suited for your power needs.
For 65 years, Empire has offered superior quality and has served industries across Arizona including education, warehousing, retail, recreation, healthcare, food service and manufacturing.
When you contact Empire for a site assessment, a qualified engineer will determine the specific, and most optimal, system available to help you reduce your energy expenses. The assessment will determine the size of photovoltaic system needed, where it should be placed, and what angle the panels will be titled to capture the maximum amount of sunlight.
In addition, Empire's engineers will determine what type of system and installations options will be needed, how much you'll save, and how quickly you'll see a return on your initial investment. This will include an estimate for installation costs, available financial incentives, and first year production estimates along with annual savings projections.
Contact Empire Renewable Energy to get started today.
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When it comes to choosing panels for a home solar power system, many people prioritize panel efficiency, which dictates the amount of sunlight the panels can convert to usable energy. High-efficiency panels tend to generate more power, making them more likely to maximize your energy savings over time.
In this guide, I will review the top seven most efficient solar panels in the clean energy industry you can install on your home and discuss how they compare to other performance metrics. I’ll also take a look at the other panel models available from the companies that manufacture the most efficient solar panels to help you decide if another option might suit you better.
Top Pick
4.4
Manufactures its own solar panels
Nationwide service area
Multiple financing options available
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Best Panel Warranty
4.4
Comprehensive 25-year panel warranty
Offers inverters and batteries
Mobile app for panel monitoring
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Best Solar Financing
4.3
No payments needed for 18 months
Provides in-house financing
Offers top brands like LG and Trina
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Best Customer Service
3.9
Highly rated customer service
Provides 24/7 panel monitoring
Solid A+ rating with the BBB
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I’ve spent several years researching and writing about solar panels and manufacturers, and I’ve found that the following are the best solar panels with the highest efficiency ratings you can buy for home solar projects:
Maxeon
: Most Efficient Panels
Most Efficient Panels
LONGi : Most Reliable
REC : Most Durable
Trina : Consumer Favorite
QCells : Best Product Warranty
I should mention that Panasonic panels were hitting efficiency ratings that were higher than some of these options, but the company has since stopped manufacturing its own panels. As such, I’m not including it as a solar panel brand on this list.
When you’re installing a solar array for $15,000+, the last thing you want is for the panels to underproduce and leave you with a monthly energy bill on top of the cost of the panels. One of the best ways to avoid that is to choose panels with a high-efficiency rating, but there are also some additional things you should look for, even among the highest-efficiency solar panels:
Cost per watt: If you’re looking to maximize your panel efficiency for long-term savings, you’re probably concerned with getting the most value out of your solar panel system. A good way to do that is to select for high efficiency in combination with a low cost per watt. Doing so will help maximize your savings over time and reduce your up-front installation costs.
Efficiency warranty: Industry-leading efficiency is great, but if the panel degrades more rapidly than others, then you might not see the same savings in the long run. That’s where an efficiency warranty comes in. This coverage guarantees a maximum degradation rate, which ensures that your panels will continue outperforming other models for decades to come.
Manufacturer’s warranty: Even if you have a solid efficiency warranty, you should also ensure you’re protected from panel malfunctions and manufacturing defects, which can directly affect production. A lengthy equipment warranty will also help make sure your panels stick around and continue pumping out maximum energy for your home.
Appearance/panel options: Although efficiency might be your top priority, you should also consider how the panels look. Most homeowners prefer all-black panels with no visible grid lines for a sleek, modern appearance, but not all manufacturers offer these options. I suggest you consider the appearance of the panels after these other three criteria to get a profitable system that you won’t mind looking at every day.
If you’re looking for the most efficient solar panels, you can’t do any better than Maxeon panels from SunPower. These have the highest efficiency rating in the entire industry — maxing out at 22.8% — and they also boast some other pretty impressive performance specs. I’ll include a look at how the different top manufacturers of high-efficiency solar panels compare in the table below.
Panel ManufacturerOur Overall Score (Out of 5.0)Cost Per WattMax EfficiencyAll Black/No Grid LinesMaxeon4.3$2.80 – $3.0022.8%YesJinko Solar3.8$2.50 – $2.8022.65%NoLONGi4.2<$2.5022.6%SomeCanadian Solar4.0$2.50 – $2.8022.5%SomeREC4.2$2.50 – $2.8022.3%SomeTrina4.0$2.50 – $2.8021.8%SomeQCells4.5$2.50 – $2.8020.9%Yes
Most Efficient
4.3
Our Rating
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Maxeon panels have the highest efficiency you can get in terms of residential solar panels, topping out at an impressive 22.8%. I recommend these panels to anyone who can afford them, which is a serious sticking point, given that they’re one of the most expensive brands available. I do think they’re worth the investment, though.
Click here to find the Maxeon dealers nearest you.
Why We Chose Maxeon
It’s hard not to choose Maxeon panels as the most efficient since they have a higher efficiency than any other panel on the market. Not only that, but they have stellar degradation rates, which means that efficiency is going to stick around for longer than it would in most other brands. All in all, these combine to make Maxeon panels the most likely to maximize your savings and maintain high efficiency throughout the panel life span.
Maxeon panels also have incredible warranty coverage, with some of the premium models coming with an unheard-of 40-year warranty. That’s nearly double the industry average, which means you not only get maximum performance but also peace of mind that your panels are going to last for decades to come.
I also love the look of Maxeon panels, as all of the models are entirely black, super sleek, and don’t have visible grid lines. These are the panels I installed on my own home, which should go to show how much trust I — and thousands of other people — put in Maxeon as a brand.
My Score of Maxeon
What We Don’t Like
The only real downside to Maxeon panels, in my opinion, is that they’re expensive. They average around $3.00 per watt, which is well above what most other panels go for. Compared to some of the more inexpensive brands that sit at $2.50 per watt, that’s an additional $4,500 you’re paying for the premium Maxeon panels. I do think it’s worth it, though.
The only other downside is a minor one: Maxeon only has a few panel models currently available. This isn’t a huge deal, no matter what, but especially if you’re just looking for the most efficient solar panels available.
Maxeon currently has two lines of panels available for home use:
Maxeon 3: These are slightly more affordable than the Maxeon 6 panels and have lower efficiency ratings — between 21.2% and 22.7%. These are also smaller than the Maxeon 6 panels, so they’re better for smaller roofs.
Maxeon 6: The Maxeon 6 panels have a record-setting peak efficiency of 22.8%, so they’ll deliver the highest energy production of any panel on the market. They’re quite a bit bigger than the Maxeon 3 line, so you may not be able to fit as many on your roof.
Panel ModelEfficiency RatingPower OutputTemperature Coefficient (per degree C over 25)Power ToleranceEfficiency After 25 YearsMaxeon 6Up to 22.8%410W to 440W-0.27%0/+5%92%Maxeon 3Up to 22.7%355W to 430W-0.27%0/+5%92%
Maxeon panels come with some of the most appealing warranty coverage in the industry, which includes an unprecedented 40 years of coverage for manufacturer defects and a 40-year power production guarantee, both of which are better than the industry average. After 25 years, Maxeon panels are guaranteed to retain 92% of their starting efficiency, which is far better than the average, which is in the mid-80s.
Installation Options
Maxeon panels are available through the manufacturer’s sister company, SunPower. You can also get Maxeon panels through SunPower Master Dealers and certified installers.
Featured Video: Learn Just How Efficient Solar Technology Is Getting & What That Means For You
Most Affordable
3.8
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Jinko Solar is based in China and has some of the most affordable solar panels with high efficiency. They’re great for homeowners who want maximum power output on a budget. However, they do have less impressive warranty coverage and other performance specs than most direct competitors on this list.
Click here to find the Jinko Solar dealers nearest you.
Why We Chose Jinko Solar
Jinko’s top-of-the-line panels reach up to 22.54% efficiency, which positions the company as a top competitor for efficiency. While the Tiger Neo panels from Jinko that hit this number aren’t available in the U.S., the top panels from Jinko that are available in America still top out at an impressive 21.13%.
Jinko’s pricing is pretty impressive as well, as it’s one of the only top panel brands with an efficiency of over 21% that comes in at below-average prices per watt. You could pay a few thousand dollars less for a system from Jinko than you would for a system with panels from a similar manufacturer.
Jinko panels also have a below-average temperature coefficient of as low as -0.29%, making them a good option for homeowners in hot climates looking for a high-efficiency but affordable panel brand.
My Score of Jinko Solar
What We Don’t Like
The biggest downside to Jinko panels, in my opinion, is that they only come with a ten-year manufacturer’s warranty. That’s less than half of what most other tier-one manufacturers offer. This calls into question the durability of the panels overall. Unless you’re prioritizing upfront price more than anything else, I’d recommend a different manufacturer overall for this reason.
Another downside is that the degradation rate is worse than most other panels on this list. The first-year degradation is 3%, which is higher than almost every other tier-one manufacturer. The subsequent years’ degradation is 0.55%, which is, again, well above the average. These panels will produce above-average amounts of electricity in the first few years, but over time, they’ll degrade too much, in my opinion, to make them a true competitor in terms of efficiency.
Jinko Solar has six different panel lines, but only four are available in the U.S.:
Eagle G6: This is the highest efficiency and most expensive option from Jinko. It’s also the only one to use TOPCon technology to boost efficiency. These panels are the largest available from Jinko (in the U.S.), so they might not be suitable for you if you have a small roof.
Eagle G5: The G5 panels have the second-highest efficiency rating of the four but are also the second-most expensive. These panels are also quite large, so they’re not ideal for solar systems on small roofs.
Eagle G4: These panels have a slightly lower efficiency rating than the G5, although the difference is nearly negligible. These are much smaller, making them better for homeowners with limited roof space.
Eagle Continental: These panels are also about average in size and will fit on most roofs. They are the most affordable option, but the efficiency is quite a bit lower at 19.88%.
Panel ModelEfficiency RatingPower OutputTemperature Coefficient (per degree C over 25)Power ToleranceEfficiency After 25 YearsEagle G6Up to 22.65%440W to 565W-0.29%0/+3%89.4%Eagle G5Up to 21.13%525W to 545W-0.35%0/+3%85.8%Eagle G4Up to 20.96%380W to 400W-0.35%0/+3%84.25%Eagle ContinentalUp to 19.88%380W to 400W-0.35%0/+3%84.25%
Jinko’s warranty coverage isn’t ideal. Although most of the panels have a 25- to 30-year power production warranty, the degradation rates are above average for most of the panel options. Plus, the manufacturer’s warranty for many of the panels is just 12 years, which is less than half of what most direct competitors provide.
Installation Options
Jinko Solar doesn’t have exclusive relationships with any solar installers, so you should have some options. However, these panels are less popular in the U.S. than most others on this list, so you may have some difficulty finding an installer near you that carries Jinko products.
Most Reliable
4.2
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LONGi is the largest solar panel manufacturer in the world and for good reason. Its panels are highly reliable and durable, so although the warranty coverage isn’t the best, countless customers rely on them and get peace of mind from the fact that they perform well and usually for decades.
Click here to find the LONGi dealers nearest you.
Why We Chose LONGi Solar
LONGi panels top out pretty close to Maxeon at 22.6%, which is still well above the industry average. These panels are very likely to generate sufficient power for you to see substantial savings on your electric bills for many years.
LONGi panels are well known in the industry to be reliable, usually lasting quite a bit longer than the 15 years the company covers manufacturer defects.
LONGi panels are not only reliable, but they’re also quite affordable, which means you’re likely to pay several thousand dollars less than you would for an equivalent system with panels from Maxeon or another premium manufacturer.
LONGi panels are massive, averaging around 575 watts, compared to the industry standard of around 375 watts. This means each panel provides more power, although they will take up more space on your roof.
My Score of LONGi Solar
What We Don’t Like
The one major downside to LONGi panels is that the warranty coverage for manufacturer defects only lasts for 15 years, which is ten years shorter than the industry average. This isn’t a huge deal because the panels are known to be durable, but you won’t get the same peace of mind you would from a company that delivered the full 25 years or one like Maxeon that goes above and beyond in terms of coverage.
Additionally, while the panels being larger than average could be seen as an upside, homeowners with small roofs might be hindered by their wattage. Smaller roofs are less likely to be able to fit the proper number of these panels.
LONGi has four main panel options available in its new Hi-Mo 6 line-up:
Hi-Mo 6 Scientist: These have the highest efficiency of solar panels available from LONGi, and they’re also the largest. As such, they deliver the most impressive power output per panel.
Hi-Mo 6 Explorer: The Explorer panels have a lower temperature coefficient than the other options, meaning they will lose less efficiency in higher temperatures. These might be best for you if you live in an extreme climate.
Hi-Mo 6 Guardian: The Guardian panels use self-optimizing technology to maximize production. If your roof is in partial shade or you see a lot of cloudy weather, these panels might be best for you.
Hi-Mo 6 Artist: The Artist line-up is one of the only panel options in the industry that comes in different colors, allowing you to customize the appearance of your system.
Panel ModelEfficiency RatingPower OutputTemperature Coefficient (per degree C over 25)Power ToleranceEfficiency After 25 YearsHi-Mo 6 ScientistUp to 22.6%580W to 590W-0.29%0/+3%88.9%Hi-Mo 6 ExplorerUp to 22.1%560W to 570W-0.29%0/+3%88.9%Hi-Mo 6 GuardianN/AN/AN/AN/AN/AHi-Mo 6 ArtistN/AN/AN/AN/AN/A
LONGi lags behind the competition in some cases when it comes to the warranty coverage that’s included with its panels. The manufacturer’s warranty only lasts for 15 years in some cases, which is well under the industry average of 25 years. The panel degradation in the first year is below average at just 1.5%, as is the subsequent years’ degradation at 0.4%.
They maintain around 88.9% of their starting efficiency after 25 years, which is better than average but not as good as Maxeon panels.
Installation Options
Unlike Maxeon, LONGi doesn’t favor any specific installer. As the largest panel manufacturer in the U.S., there are very likely a variety of installers in your area that install LONGi panels.
Best Value
4.0
Our Rating
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Canadian Solar panels deliver outstanding value, as they’re positioned below the average price per watt of competitors but also come with above-average efficiency ratings and are known to last a long time. The panels degrade a bit more quickly than average, and some models don’t have the best warranty coverage, but they’re still a great high-efficiency option.
Click here to find the Canadian Solar dealers nearest you.
Why We Chose Canadian Solar
Canadian Solar is a reliable brand that has gained a lot of popularity in the U.S., primarily because of the panel quality for the price. If you don’t need to max out your efficiency and your energy production but you still want a high-performance panel at a great price, Canadian Solar might be the ideal option for your solar project.
Canadian Solar is also great for customers who want to prioritize cost entirely, as it’s one of the few high-end manufacturers that also carries polycrystalline panels. These have lower efficiency, but the easier manufacturing process makes them significantly cheaper than monocrystalline solar panels.
Canadian Solar’s warranty coverage on its high-end models is also excellent and either in line with or better than the industry average, depending on which model you purchase.
My Score of Canadian Solar
What We Don’t Like
While the warranty coverage for the premium models is great, it’s lacking for the more affordable options, which is kind of to be expected. Most Canadian Solar panels outside of the new line-up of HiHero panels only come with a 15-year warranty for manufacturer defects, compared to the industry standard of 25.
Plus, the panels from Canadian Solar degrade more rapidly than many of the other top-efficiency panels. After 25 years, your panels will drop to 84.8%, which is just below the industry average and well below what you’d get from Maxeon and other leaders in panel durability.
Canadian Solar has a ton of panel options available, all of which fit into four main product lines:
HiKu: The HiKu line is one of the most affordable options from Canadian Solar, but it also has lower efficiency ratings. The HiKu panels have efficiencies as low as 19.4%.
BiHiKu: The BiHiKu line also has lower efficiency ratings than many others, although they’re a bit more efficient than the HiKu panels. These are quite a bit larger, at up to 550W, making them a better option for homeowners with a large roof who are on a budget.
TOPHiKu/TOPBiHiKu: This product line uses TOPCon technology, which brings the efficiency up to 21.4% for great performance. The TOPBiHiKu panels are larger and come in sizes up to a massive 695W, the largest from the manufacturer.
HiHero: The HiHero panels have the highest energy efficiency of the lot, up to 22.5%. They use heterojunction (HJT) solar cell technology, and they are the most expensive option from Canadian Solar.
Panel ModelEfficiency RatingPower OutputTemperature Coefficient (per degree C over 25)Power ToleranceEfficiency After 25 YearsHiHeroUp to 22.5%420W to 445W-0.26%0/+10%90.6%HiKu 7Up to 21.6%640W to 670W-0.34%0/+10%84.8%BiHiKu 6Up to 21.4%520W to 550W-0.34%0/+10%87.2%BiHiKu 7Up to 21.4%640W to 665W-0.34%0/+10%87.2%TOPHiKu 6Up to 21.4%420W to 570W-0.29%0/+10%89.4%TOPBiHiKu 6Up to 21.4%555W to 575W-0.29%0/+10%89.4%TOPBiHiKu 7Up to 21.4%615W to 695W-0.30%0/+10%89.4%Hiku 6Up to 21.3%445W to 555W-0.34%0/+10%84.8%
The warranty coverage for Canadian Solar panels varies based on the model you install on your home. The top-of-the-line options come with 30 years of coverage, which is a little longer than average, while the more affordable and less efficient options only come with 15 years of coverage, which isn’t ideal.
Installation Options
Canadian Solar is another panel manufacturer that doesn’t work with specific installers. You should be able to find a solar panel installation company in your area that carries and installs panels from Canadian Solar.
Most Durable
4.2
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REC is one of the most popular solar manufacturers in the United States, primarily because it combines stellar efficiency and panel durability that is second to none. The panels are a little on the expensive side, but I feel they’re worth the investment.
Click here to find the REC dealers nearest you.
Why We Chose REC
REC’s most efficient panels make use of HJT technology to reach efficiency ratings of up to 22.3%, which is lower than the top competitors but still well above the industry average. Not only are the panels highly efficient, but they also have some of the most impressive degradation rates in the industry. The most premium option from REC matches Maxeon and maintains 92% of its efficiency after 25 years.
REC’s warranty coverage is usually quite good and in line with the industry average, which is what we like to see. Most of the panels include a 25-year warranty for manufacturer defects and power production to help guarantee energy savings for you and your home.
Finally, REC panels have a temperature coefficient of just -0.26%. That makes them one of the best options in the industry for hot climates, as they will maintain their efficiency better than most other panels, even when temperatures are high.
My Score of Canadian Solar
What We Don’t Like
There’s not much I can say about REC that isn’t positive; it’s one of the most prevalent panel options in the country for a reason. The only downside is that they are more expensive than many competitors. Plus, if cost isn’t an issue, I’d sooner go with the Maxeon panels for better performance.
REC has three main product lines, each delivering a varying level of performance and coming in at different price points:
Alpha Pure: The Alpha Pure line-up has two models available, both of which have the highest efficiency ratings available from REC — between 21.6% and 22.3%. These are the most expensive, but I’d recommend them if you’re looking to maximize energy production and offset the most consumption. These contain HJT solar cells.
N-Peak: These panels are monocrystalline and have the lowest efficiency rating available from REC of 20.3%. They’re middle-of-the-road in terms of cost per watt from the manufacturer.
TwinPeak: The TwinPeak line boasts efficiency ratings of up to 20.5%, but they’re still the most affordable option from REC. These are the smallest of the bunch, coming in as low as 360W, so they’re the best from the company for homeowners with small roofs. This product line is being phased out, so it may not be available for much longer.
Panel ModelEfficiency RatingPower OutputTemperature Coefficient (per degree C over 25)Power ToleranceEfficiency After 25 YearsAlpha Pure-RUp to 22.3%410W to 430W-0.26%0/+5%92%Alpha PureUp to 21.6%385W to 410W-0.26%0/+5%92%TwinPeak 4Up to 20.5%360W to 375W-0.34%0/+5%92%N-Peak 3Up to 20.3%390W to 400W-0.34%0/+5%92%N-Peak 2Up to 20.3%360W to 375W-0.34%0/+5%92%
REC’s high-end panels in the Alpha Pure series come with a 25-year warranty for the equipment, while all other options get a slightly below-average 20-year warranty. The power production guarantee is the same for all models, though, which ensures that your panels lose no more than 2% efficiency in year one and 0.25% per year after that for a full 25 years. That leaves you with an industry-leading 92% efficiency after 25 years, which is in line with Maxeon.
Installation Options
REC doesn’t have exclusive relationships with any installers, and countless solar companies work with REC panels. In fact, it’s one of the most popular panel brands in the country. REC does offer a more impressive warranty if you choose a REC-certified installer, though.
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Trina has been manufacturing solar panels since 1997, so it has decades of research and experience behind it. The panels go through rigorous testing, which helps ensure long-term panel performance and durability. These panels are sleek and modern, and they’re more affordable than other options that are comparable.
Click here to find the Trina dealers nearest you.
Why We Chose Trina
Trina has a few lines of panels available for residential solar arrays, the most efficient of which hit impressive efficiency ratings of 21.8%. Like other manufacturers near the top in terms of efficiency, Trina makes panels that are less efficient than Maxeon but still well above the industry standard.
Trina delivers great quality for the money in terms of warranty coverage, efficiency, and durability. The panels are typically a little above the average, but they’re less expensive than options from some direct competitors in the above-average efficiency space.
They come in a pretty wide variety of sizes, ranging from 335 watts, which is much smaller than the typical size, up to a massive 600 watts, which is great for maximizing power production for homeowners with large roofs. This alone makes them a versatile panel option in the U.S.
My Score of Trina
What We Don’t Like
Trina panels have a rather high-temperature coefficient, averaging around -0.39% across their panel options. As such, they will lose more efficiency than most other panel brands in hotter climates. I wouldn’t recommend Trina as a brand unless you live in a moderate or cold climate for this reason.
Another potential downside for some homeowners is that less than half of the models available from Trina aren’t all black with non-visible grid lines. Some of the more affordable panel options aren’t going to look as sleek or modern as those from other companies.
Trina manufactures six different lines of solar panels for home photovoltaic (PV) systems:
Vertex N: This is the biggest option — up to 600 watts — from Trina, which makes it great for homeowners with large roofs. It also has the highest efficiency rating available from the manufacturer.
Vertex S+: These panels are smaller than the Vertex N option, but they still boast high-efficiency ratings of up to 21.8%.
Vertex: The Vertex line is all black, but there are visible grid lines, which I find a lot of homeowners don’t like. They have a slightly lower efficiency rating of 21.4%, but they’re a little more affordable.
Residential: The Residential panels are smaller than the other options, coming in between 335 watts and 365 watts. They’re more affordable than the Vertex product lines, but the efficiency ratings are lower, topping out at 20.6%.
TallMax: The TallMax line is, as the name suggests, taller than most competing panels, and they’re also thinner. This shape makes them a great option for homeowners with long, thin roof sections that need panels.
DUOMax: The DUOMax panels are great for homeowners looking to keep installation costs down, as they are the most affordable option from the company. However, they also have the lowest efficiency rating of all product lines, with a maximum efficiency of just 18.4%.
Panel ModelEfficiency RatingPower RatingTemperature Coefficient (per degree C over 25)Power ToleranceEfficiency After 25 YearsVertex N21.8%350W–370W-0.30%0/+5%85.5%Vertex S+21.8%380W–435W-0.30%0/+5%87.4%Vertex21.6%530W–635W-0.36%0/+5%84.8%TallMax21.0%435W–460W-0.34%0/+5%84.8%Residential20.6%310W–380W-0.36%0/+5%83.1%DUOMax18.4%345W to 365W-0.39%0/+5%85.5%
All of Trina’s panels come with solid warranty coverage, which includes 25 years of protection for the panels themselves, as well as a 25-year production guarantee. The panels from Trina do degrade more rapidly than many direct competitors, though, with the highest degradation rate leading to just 83.1% remaining power after 25 years.
Installation Options
Trina offers its panels to any installer that wants to carry them, so there are no specific companies you need to look for if you want Trina panels.
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QCells is a super popular panel brand in the U.S., in large part because the panels come with outstanding warranty coverage and have some of the lowest panel failure rates in the industry. I’d trust these panels to last longer than most others, although they do have lower efficiency ratings than many direct competitors.
Click here to find the QCells dealers nearest you.
Why We Chose QCells
Hanwha QCells is best known in the solar industry for putting its panels through an absurdly rigorous testing protocol, which means the panels perform more reliably than most other brands out in the field. They have a low failure rate and are known to last for decades.
Since the panels are so durable, QCells is able to offer a 25-year manufacturer’s warranty and a 25-year power production warranty on most of its panel models. Plus, the company has a great track record of holding up its end of the bargain when it comes to responding to warranty claims.
QCells panels have efficiency ratings of up to 21.4%, which is well above the industry average. That means your panels are likely to generate plenty of power to maximize your energy savings over time. They also have a wind load resistance that’s around 30% higher than the average, so they’re great in areas that see extreme weather.
Finally, QCells panels come in at a lower price per watt than most direct competitors, so they deliver great value for the money.
Trina delivers great quality for the money in terms of warranty coverage, efficiency, and durability. The panels are typically a little above the average, but they’re less expensive than options from some direct competitors in the above-average efficiency space.
They come in a pretty wide variety of sizes, ranging from 335 watts, which is much smaller than the typical size, up to a massive 600 watts, which is great for maximizing power production for homeowners with large roofs. This alone makes them a versatile panel option in the U.S.
My Score of Qcells
What We Don’t Like
The degradation rate of QCells panels isn’t ideal, as it sits a little above the industry average and well above direct competitors, like Maxeon.
QCells panels also have an above-average temperature coefficient of -0.39%. As such, I wouldn’t recommend them for solar customers who live in particularly hot climates, as the panels lose more power than most others on this list for every degree above 77 degrees (F) the temperature rises.
QCells only has two-panel models available for residential use, and they’re quite similar:
Q.PEAK DUO BLK ML-G10+: This is the more efficient of the two, with an efficiency rating topping out at 20.9%. These panels are a little larger, so they might not be ideal if you have a small roof.
Q.PEAK DUO BLK-G10+: These panels have a slightly lower max efficiency of 20.6%. They’re smaller, with options as low as 350 watts. That means they’re more likely to fit on smaller roofs.
Panel ModelEfficiency RatingPower OutputTemperature Coefficient (per degree C over 25)Power ToleranceEfficiency After 25 YearsQ.PEAK DUO BLK ML-G10+Up to 20.9%385W to 410W-0.34%0/+5%86%Q.PEAK DUO BLK-G10+Up to 20.6%350W–370W-0.34%0/+5%86%
QCells provides a 25-year warranty for the equipment, which is average, but its power production guarantee is longer than average, lasting for 25 years as well. QCells has an impressive track record for highly durable panels that rarely see warranty claims, and it also is known to respond quickl