Skip to content
Best Solar Panel Guide: REC vs. Sunpower. Sunpower 400 watt

Best Solar Panel Guide: REC vs. Sunpower. Sunpower 400 watt

    Best Solar Panel Guide: REC vs. Sunpower

    Advantages to Going Solar

    As renewable energy gains popularity, solar energy is emerging as a top choice due to its numerous financial and environmental advantages. By installing solar panels, you can generate most of your own power and reduce your reliance on the grid, resulting in significantly lower electric bills. Additionally, investing in solar energy can increase the value of your property, making it a Smart long-term investment.

    Beyond the financial benefits, going solar also has a substantial positive impact on the environment. By decreasing your reliance on non-renewable energy sources, you can reduce your carbon footprint and help combat climate change. For example, an average single residential solar panel system can eliminate around 4 tons of greenhouse gas emissions annually, which is equivalent to planting over 100 trees.

    best, solar, panel, guide, sunpower

    How to Chose the Best Panel

    When you choose to go solar, selecting the right solar panel type is crucial. There are two main types of solar panels to choose from: monocrystalline and polycrystalline. Monocrystalline panels are made from a single silicon crystal and are known for their higher efficiency and quality, while polycrystalline panels are made by melting together many fragments of silicon and are less expensive but less efficient.

    Aside from the type of panel, other important factors to consider are performance metrics such as power and efficiency. Power is the panel’s output under ideal conditions, measured in Watts (W), while efficiency refers to how well the panel can convert sunlight into electricity. These two factors combined determine the overall electricity production of the solar panel system. Other factors to consider when selecting solar panels include warranty, temperature coefficient, and resiliency depending on the location where the panels will be installed.

    SunPower is a solar energy company that has shifted its FOCUS from manufacturing to installation, now partnering with a couple of oversea manufacturers, such as Singapore’s Maxeon and India’s WaaRee for solar panel manufacturing. This is contrary to consumers’ conception that Sunpower is made in the USA. While SunPower installs Maxeon and WaaRee products, it’s worth noting that Sunpower’s installs can be more expensive than other comparably advanced solar panels on the market. Additionally, many of these products are now available to other installers, which may offer them at a better price than SunPower.

    REC is a strong solar panel manufacturer that has been in the industry for over two decades. While REC is a Norwegian company, it has a manufacturing facility in Singapore, reflecting its global presence in the market. REC offers a range of excellent solar panel series, with the Alpha Pure and Alpha Pure R series being among their most popular products. Overall, REC is known for producing high-quality solar products at competitive prices, making it an attractive option for those looking to invest in solar energy. With REC, you can obtain a top-notch solar panel system at a relatively affordable price, without compromising on quality or performance.

    Comparing Panels: REC Alpha REC400AA vs. Sunpower A-Series SPR-A400

    When comparing solar panels, the REC Alpha REC400AA and SunPower A-Series SPR-A400 (manufactured by Maxeon) have several similarities. Both panels are monocrystalline with a rated power of 400W, a 25-year warranty, and 0.25% derating. While the efficiency rating for SunPower’s panel is 21.4%, REC’s panel has a slightly higher efficiency rating of 21.6%, although the difference is minimal.

    One significant advantage of the REC panel is its 132 monocrystalline half-cut cells, compared to SunPower’s standard 66 cells. This feature gives the REC panel an edge in shading tolerance and leads to a slight increase in panel efficiency. Additionally, the half-cut cells in REC’s panel are physically more durable than traditional cells, thanks to their smaller size, making them less susceptible to cracking.

    Another notable difference between the two panels is their price and bankability. While both panels have comparable features, SunPower’s A-Series SPR-A400 is typically more expensive than the REC Alpha REC400AA, which is still a reputable and bankable product. Therefore, the REC panel is an excellent option for those seeking a high-quality, durable, and cost-effective solar panel system.

    Brand REC Sunpower
    Model Alpha REC400AA A-Series SPR-A400
    Cell Type Monocrystalline Monocrystalline
    Efficiency 21.6% 21.4%
    Power 400W 400W
    Power Derating 0.25% 0.25%
    Product Warranty 25 yrs 40 yrs
    Performance Advantage Half-cut cells Standard cells

    A 40-year warranty for solar panels is uncommon and may not be practical for most consumers as it is likely that the roofing will need to be replaced before the warranty period is over. In such cases, u ninstalling and reinstalling the solar panels is a costly process. and many owners may decide to upgrade their solar systems instead, rendering the 40-year warranty less significant. Consumers should consider the long-term cost-benefit of investing in a solar panel system with a 40-year warranty before making a decision.

    Solar Panel

    We use cookies on our website. Some of them are essential (e.g. for the shopping cart), while others help us to improve our online offering and operate it economically. You can accept this or reject it by clicking the Only accept essential cookies button.

    Cookie overview

    Here you will find an overview of all cookies used. You can give your consent to entire categories or have more information displayed and only select certain cookies.

    Essential cookies

    Essential cookies enable basic functions and are necessary for the proper functioning of the website.




    Privacy policy

    Cookie Name

    Cookie Runtime




    Privacy policy

    Cookie Name

    Cookie Runtime




    Privacy policy

    Cookie Name

    Cookie Runtime

    No transmission to third parties
    Cookies to control the login process of shop customers.
    Browser session
    No transmission to third parties
    Cookie to control the information about cookies.
    30 Days
    No transmission to third parties
    Cookie to control the integration of marketing cookies.
    30 Days

    Marketing cookies

    Marketing cookies are used by third parties or publishers to display personalized advertising. They do this by tracking visitors through websites.

    I accept




    Privacy policy

    cookie Cookie Name

    Cookie Runtime

    Google Analytics
    Google LLC
    Google cookie for website analysis. Generates statistical data on how the visitor uses the website.
    2 Years

    WartungsarbeitenHeute von 15-23 Uhr wird unser SecondSol Marktplatz nicht erreichbar sein.

    MaintenanceToday from 3pm-11pm our website will be unavailable.

    OnderhoudVandaag van 15-23 uur zal onze website niet beschikbaar zijn.

    ManetenzioneOggi dalle 15 alle 23 il nostro sito web no sarà disponible.

    SunPower increases solar cell size with new 400-W A-Series of modules for the residential market

    SunPower launches today in the United States a new line of solar modules for the residential market. The new A-Series, using SunPower’s “Next Generation Technology” will deliver 400 and 415 W of power. In Europe and Australia, the company has also released 400-W panels known as Maxeon 3.

    New A-Series modules on a home

    “SunPower is introducing the world’s first 400-W residential solar panels as most in the industry are just crossing the 300-W threshold for home solar,” said Jeff Waters, CEO of the SunPower Technologies business unit. “Our record-breaking cell technology and innovative research and development efforts have enabled us to fit more power capacity on rooftops than we ever have before. Our growing panel portfolio is delivering unprecedented value across global markets that goes unmatched by any other residential solar technology currently available.”

    SunPower’s patented Maxeon solar cells are built on a solid copper foundation for high reliability and performance. The Maxeon cells provide SunPower panels with improved resistance to corrosion and cracking.

    SunPower’s new larger solar cell (right). Credit: Paul Sakuma Photography

    A-Series panels are built with SunPower’s fifth-generation Maxeon solar cells, called Gen 5, which were perfected at the company’s Silicon Valley Research Facility. This new technology required new materials, tools and processes, and resulted in a 65% larger cell than previous generations that absorbs more sunlight and ultimately offers more savings to homeowners.

    Combined with Maxeon Gen 5 solar cells is one of the industry’s highest-powered, factory-integrated microinverter, making A-Series ideal for use with SunPower’s Equinox platform. All SunPower panels are backed by its 25-year combined power and product warranty.

    The Maxeon 3 panels in Europe and Australia use SunPower’s third generation of smaller Maxeon cells.

    “SunPower solar panels are designed to maximize power production and energy savings for our customers, and we’re only scratching the surface of what’s possible in home solar,” Waters said. “With our innovative solar solutions and services, and our established channels to market, SunPower will continue building on its strong leadership position in distributed generation around the world.”

    About The Author

    Kelly Pickerel

    Kelly Pickerel has over a decade of experience reporting on the U.S. solar industry and is currently editor in chief of Solar Power World.

    Комментарии и мнения владельцев

    Larger maybe, but you all seem to forget that word and real meaning of the word… efficiency! the A425 has 22.8% efficiency, so a larger panel with more efficiency means that you will actually buy less number of panels.

    This is “vaporware” in the US. For one thing, I have yet to find a dealer (6-8) contacted nation wide. None of them have 400w x-series. For second point, The one that did wanted 1400 a panel plus shipping. Im told by other dealer that this is bullocks because sunpower will not sell panels unless the dealer gets to install. Now having said this I would strongly discourage others from buying from SunPower. This practice that you are forced to buy install with panels is bad for the consumer. And in other industries and situations this is called “tie-in” and courts have ruled it illegal. Customers dont have to wait for lawsuit — just vote with your feet. There are other manufacturers that are so close to this 400W, that its going to be better to go with them.

    This. I have been asking them for panel pricing for years now. #DemandBetterSolar. How do they even make money if nobody can buy them, or even determine cost? Just like Auntie Maxeon said, #ReclaimingMyTime. I do not have time for games and nonexistent nonsense. Being mysterious and inaccessible is not cool, it is frustrating af. You are not the revolution. You are not available. I hate your brand. #SunPowerSucks. I hope you get Solyndra’d. You are useless. If your market is multimillion dollar installations only and idiots willing to pay 4x too much for a goddamn commodity, STOP ADVERTIZING TO ME. Solar Cells should be getting smaller and more modular so they can fit in more places, not 65% larger. But you are not trying to install your panels in more places. You are trying to be exclusive. Which is gross morally, and must be bad for your business if it exists at all. Go power your own world cuz you haven’t even tried to power anything in mine, ever. Your degradation rate is actually the worst in the industry because this invisible and inaccessible pricing is demeaning, degrading, and disrespectful to all the nerds that spend their free time trying to make the world a better place and fall into the trap of your marketing wasteland. I don’t know how one monetizes pissing off the little people, but if i ever get my hands on an elusive SunPower panel, i’m throwing it off the roof and tossing the shattered glass onto YouTube to demand better solar. I deserve 420W panels for my home grow anyway. I’ll wait. #ReclaimingMyShine.

    I was wondering how much do these 400Watt modules cost? and the type they are called? I was thinking about investing in one where could you recommend me to get started?

    Ok well can someone please tell us the difference and do a comparison article. That will answer the questions, that would be really really great and also maybe throw availability. Thanks

    I just completed an install with the new A series 415 w modules. Amazing product! They are an AC module. 66 cell format. Just slightly larger in height to the standard 60 cell format. Approx 3-4 inches taller.

    IF so, these panels will be about 3 inches wider and actually around 1 inch shorter than the typical 350W panels out today, much like the LG 350W series panels. The old Schott solar PV panels that were in the 400W to 500 watt range were right at 4 foot wide by 8 foot long. This allows one to “harvest” 400 to 415W from about 16.25 square feet as opposed to “harvesting” 330 to 350W from about 17.5 square feet. It’s this kind of technology nudge that will drive some early adopters of solar PV to install these new panels and put their old system on e-bay for the secondary used market. Is this not how the automobile built by Henry Ford became so popular. First as an affordable automobile, then as a cheap second hand car creating the “used car” market? Bring on the high output panels, the hybrid inverters and cheap battery storage to allow net zero energy use for decades to come.

    So this is actually 66 cells at 400 watts? And what is the difference between the 400W to the 415W is the 400W a blk on blk?

    This is bogus. You can’t get them. Certainly you can’t get them in the US. That’s what they will tell you when you call SP. But they wills say Europe. Call Europe and they will tell you, not Europe; but you can get them in the US.

    There have been 400W, even 500W panels for 4.5 years. Even 500W panels at the size of these new Sunpower panels, 4.5 years ago.

    The 6×10 cell A-series produces 400W / panel at 95cm x 156cm while the 96-panel X-series produces 370W are measured 105cm x 156cm.

    What are the frame dimensions? With a larger cell it seems like they would need a larger module. If this is actually the rough size of a current 60-cell module I’ll be impressed, but if they’re making something roughly the size of a 72-cell they can get in line behind other manufacturers who have already done it.

    This image going around the internet apparently shows SunPower’s smaller X series on left and the new A series on right. The X series is a 96-cell panel… which is closeish to a traditional 60-cell panel. So maybe the 66-cell A series is more like a traditional 72-cell panel? Not sure.

    SunPower M-Series Solar Panels: Technology, Specifications, Comparison

    SunPower is a leading company in the U.S. solar industry, offering a wide portfolio of solar solutions, with the M Series being one of the most outstanding solar panels. These modules are the highest efficiency AC solar panels in the market, perfectly suited for residential and commercial applications.

    best, solar, panel, guide, sunpower

    SunPower M series solar panels feature a high conversion efficiency, low power degradation, cutting-edge technology designed by Maxeon Solar, a superior aesthetic design, and an outstanding warranty. In this article, you will learn about the technology featured by these modules, technical specifications, strengths advantages, and how they compare against other options in the market.

    Technology featured in the SunPower M-Series solar panels

    SunPower M Series solar panels are the result of cutting-edge technology, featuring the Maxeon Gen 6 solar cells and a factory-integrated microinverter.

    Maxeon Gen 6 Solar Cell

    Maxeon Gen 6 solar cells used for the M Series are designed to last longer and perform better, delivering more power during their lifetime. Featuring a 5% larger size than previous Maxeon solar cells and an improved technology, they have a leading efficiency of up to 22.8% and excellent performance in low-light environments. These cells are built with a solid copper foundation, allowing them to resist breakage and corrosion.

    Factory-Integrated SunPower Microinverter

    Each residential M Series PV module designed by SunPower features a built-in Type H IQ7HS factory-integrated microinverter, designed by Enphase at the DC output. This technology converts DC-generated power by Maxeon Gen 6 solar cells into AC power, optimizing energy levels and improving performance by up to 25%.

    Technical specifications details of the M-Series solar panels

    SunPower has designed specific modules within the M Series, suited for residential and for commercial applications. In this section, we analyze the technical specifications and details of each option.

    Residential M-Series

    • Module Efficiency: Up to 22.8%.
    • Nominal Power (DC): 420W – 440W.
    • Output Power (AC): 369 VA – 384 VA.
    • Temperature Coefficient:.0.29%/ºC
    • Operating Temperature:.40ºF to 185ºF

    Residential SunPower M Series solar panels are specially designed for the SunPower Equinox System and feature 66 Maxeon Gen 6 solar cells to deliver a nominal DC power output of 420-440W before the microinverter, and 369-384VA at the AC output.

    The modules are protected by high-transmission tempered glass with anti-reflective coating, featuring a Class 1 Black anodized frame. These modules are designed to deliver around 60% more energy than conventional modules during their lifetime and are covered by a 25-year limited warranty.

    Commercial M-Series

    • Module Efficiency: Up to 22.3%.
    • Nominal Power (DC): 450W – 475W.
    • Temperature Coefficient:.0.29%/ºC
    • Operating Temperature:.40ºF to 185ºF

    Specially designed to integrate with the SunPower Helix System, commercial SunPower M Series solar panels are manufactured using 72 Maxeon Gen 6 solar cells, to deliver a DC power output of 450-475W. This variation of the M series does not feature a built-in integrated micro-inverter.

    These modules are protected by high-transmission tempered anti-reflective glass, featuring a Class 2 silver anodized frame. The modules are also covered by a 25-year warranty.

    best, solar, panel, guide, sunpower

    Strengths advantages of the SunPower M-Series

    SunPower M Series solar panels feature many strengths advantages. In this section, we will list and explain some of the most outstanding ones.

    DC to AC inversion right at the module

    Residential M Series solar panels feature a built-in Enphase microinverter, which converts DC to AC power with a reduced power loss, providing versatility to the solar array and better performance for the system. This is why this type of solar panel is generally known as an AC module.

    60% more energy in 25 years compared to conventional panels

    Maxeon Gen 6 solar cells used for M Series solar panels feature a high conversion efficiency and low power degradation over time; this results in modules producing around 60% more energy than conventional modules during their lifetime.

    One-of-a-kind 25-year Warranty

    As a result of the M Series featuring cutting-edge technology and high-quality components, the company covers the modules with a 25-year product and performance warranty.

    Highest efficiency AC solar panel

    As a result of integrating Maxeon Gen 6 solar cells and Enphase’s microinverter, SunPower M Series solar panels have risen to become the highest-efficiency AC solar panels in the market. These modules feature a conversion efficiency of up to 22.8% for a power output of 440W for residential applications and 475W for commercial applications.

    Black White or All-Black design

    SunPower M Series comes in Black White and All-Black models. The latest option is the 420-440W for residential applications available in Black White, but previous models have featured All-Black designs, a brand signature of SunPower.

    Comparing SunPower M-Series

    Comparing SunPower M Series solar panels against other options is one of the best ways to truly illustrate the potential of these solar PV modules featuring cutting-edge technology.

    SunPower M-Series vs. 420W HiDM by Canadian Solar

    The first comparison contrasts the 420W HiDM modules by Canadian Solar against SunPower M Series solar panels.

    440W M Series by SunPower420W HiDM by Canadian Solar

    SunPower M Series technical specifications surpass the 420W HiDM modules by Canadian Solar. The M Series modules feature a higher conversion efficiency and a higher power rating, they are also physically lighter and smaller. On top of the M series having a built-in micro inverter, they also perform better in extreme temperatures, making them a better option in general.

    SunPower M-Series vs. 400W Q.PEAK DUO by QCells

    Another great contrast arises by comparing SunPower M Series modules against the 400W Q.PEAK DUO by QCells, which is also a highly popular option in the solar industry.

    440W M Series by SunPower400W Q.PEAK DUO by QCells

    Contrasting differences are more notorious between the SunPower M Series and the 400W Q.PEAK DUO. The M Series delivers around 40W more than the Q.PEAK DUO since it features a much higher conversion efficiency and better performance in extreme temperatures.

    M series modules also feature lighter weight and require less roof space, on top of having an AC output by including the built-in microinverter, making them a superior option against the 400W Q.PEAK DUO.

    SunPower M Series vs. X Series SunPower solar panels

    The contrast becomes less notorious when comparing the SunPower M series vs. X series SunPower solar panels, two types of modules designed by SunPower and released to the market as different series.

    440W M Series by SunPower360W SunPower X Series Solar Panel

    Higher power output and a built-in microinverter are the main differences between the SunPower X series solar panels and the M Series, while both feature similar efficiencies and temperature coefficients. A remarkable difference rises regarding the dimension of the modules since the M series are larger than the SunPower X series solar panels.

    The similarities between both series are the result of SunPower using cutting-edge and well-developed technology for all their modules. This explains why both series feature similar efficiencies, temperature coefficients, and lightweight for their modules.

    Leave a Reply

    Your email address will not be published. Required fields are marked *