King Residence. Rancho Santa Fe, California
This project was impressive due to the homeowners desires for the installation to be as low-profile and as out of sight as possible. It required a 350 foot trench through well-manicured grass and around gas, sewer, electrical, and water utility lines.
Projects like these can be more expensive than a typical roof mount due to the extra labor and materials. This project, utilizing the most efficient solar panels in the world. the SunPower x22 360-watt AC module. cost around 37,500 after government incentives. It included 48 SunPower 360s for a total project size of 17.4 kWdc and the system will produce about 23,500 Kwhs annually. This will save the homeowners approximately 750 a month on their electric bill, coming to a four-year payback on the entire system.
This installation took one work week, with 3 days dedicating to digging and concrete and 2 days for the electrical work.
Solar Panel count: 48 panels
Project Output: 23,500 Kwhs annually
Electric Bill Savings: 750/month
Auto Gallery Mitsubishi. Corona, California.
Cosmic Solar to the rescue! We designed a 546 panel commercial solar system utilizing SunPower‘s Helix ballasted roof-mounted system. This 180 kWdc solar system was installed in late 2016 and now generates over 285 megawatts of power each year. (A megawatt is equal to one million watts. enough to power hundreds of homes each year!)
The price of this solar project was about 325,000 after accounting for the federal tax credit incentive and will save the customer millions of dollars over the course of 25 years. The savings will grow as the cost of power continues to climb over the next few decades at a significant clip.
The project took about two weeks to complete and one more week for inspection, testing and commissioning.
Solar Panel count: 546 panels
Project Output: 285 megawatts annually
Electric Bill Savings: 5,000/month
Installation Time: 3 weeks
Dykmans Residence. Rancho Santa Fe, California
Mr. Dykmans approached us here at Cosmic Solar in 2015 with one big problem.- a 3,500 monthly electric bill. Quite a large monthly burden for just two people on the property! Despite the house actually being on the market to be sold, he and his wife still wanted to have solar installed because they knew the sale of the home could take some time and they also knew it would increase the value of the home considerably.
This project required a lot of roofing work, which included removing countless double-stacked clay tiles and re-roofing underneath with shingles, then picture framing around the solar to cause the appearance that the panels are floating on the tile. When Cosmic installed this system in 2015, we utilized 168 SunPower E20 327 watt modules with SMA inverters. The cost of the system was about 98,000 after government incentives and with new SDGE rates, the Dykmans are saving over 4,000 a month on their electric bill.- which amounts to about a two to three year payback on the system. Not bad!
Project output: 94,500 kWhs annually
Electric bill savings: 4,000 a month
Installation time: 2 weeks
SUNPOWER SOLAR PANELS REVIEW
If you are interested in high efficiency solar panels, here we will review SunPower solar panels
Sunpower solar panels are the most efficient panels available in the market today. Along with the best product warranty, it is understandable that Sunpower is one of the most requested brands.
SUNPOWER SOLAR PANELS REVIEW
All this comes with a price tag. Next, we go to the smallest detail, why or why not choose Sunpower.
To evaluate a solar panel brand, you must observe some important criteria, such as:
- Performance as the temperature coefficient and tolerance.
What is the Efficiency of Sunpower solar panels?
The highest efficiency that exists in a solar panel:
A conventional solar panel with dimensions of 1.7 x 1.0 meter can be between 250W and 320W. However, a SunPower solar panel, with smaller dimensions, has powers from 327W to 370W.
We are going to exemplify it in a simple table, comparing some of the most efficient panels of the market that are commercialized regularly. You will see what we mean:
|1,559 x 1,046 x 46 mm
|1,559 x 1,046 x 46 mm
|NeON R 360
|1,700 x 1,016 x 40mm
|1,559 x 1,046 x 46 mm
|1,559 x 1,046 x 46 mm
|1.318 x 980 x 46 mm
|1.590 x 1.053 x 35 mm
|1.590 x 1.053 x 35 mm
The great difference of efficiency of SunPower with the others is clearly appreciated. It is the most technologically advanced cell that exists. In any case, we could also highlight the HIT cells of Panasonic Sanyo, which is also an exclusive technology with superior performance.
SunPower Solar Panels are Different, they are simply Better
The SunPower photovoltaic panels of the E and X series have a series of characteristics that no other photovoltaic panel has. We list some:
- A SunPower cell has a very different design from a conventional cell. because it is made on a copper base.
- Copper-based cells are more expensive than conventional cells, but a much more reliable and high-performance cell is achieved.
- SunPower cells are deposited on a tough copper base with maximum durability, while conventional cells have their contacts printed directly on the cell (such as screen printing on a T-shirt).
- The SunPower panels of the X series have a maximum annual degradation of.0.25%, so their performance is 92% at 25 years, when the conventional in the rest of manufacturers is 85% at 25 years.
View of a SunPower cell and a conventional cell:
The differences are not only aesthetic. Although the SunPower cell does not have front contacts and, therefore, in view is a completely “clean” and black cell, we must also highlight the enormous difference in efficiency that exists between a SunPower cell and the rest that are available today in day.
Solar energy guarantee
Sunpower also has no rival in terms of warranty here. Sunpower uses a very transparent guarantee for both capacity and product warranty.
- Warranty Product : where most brands offer a guarantee level 1 10 to a maximum of 15 years in Sunpower, this is no less than 25 years! And this does it for a good reason. According to Sunpower, only 1 in 20,000 solar panels goes wrong (and what is replaced).
- Production guarantee : together with the product warranty, the production guarantee is also unprecedented, or rather low. With a loss of 13% in 25 years. therefore, they retain 87% of their return. This is a loss of 0.5% per year. Where most brands cover around 0.7% of losses per year, 0.5% is a great improvement.
If the solar panel no longer meets one of these two requirements, the solar panels will be replaced free of charge. Only in case of abuse, improper installation or when the solar panel has been moved from its original location.
What is the price of Sunpower solar panels in 2019?
Sunpower solar panels are, so to speak, one step higher than the traditional brands of Tier 1 solar panels. This is also reflected in the price.
Sunpower is practically the most expensive brand of solar panels, even in € / Wp. But the unprecedented warranty on the product and power means that the price is justified.
In general, a Sunpower solar panel is, on average, 50% more expensive than the other Level 1 brands.
Is the price justified? As far as we are concerned, yes. Sunpower invests heavily in research and development and represents innovation.
Because solar panels also get much better performance, up to 45% more than other Level 1 brands, it is ideal for installations where there is little space available due to a small roof or a part in the shade. This also means less assembly and material costs.
What is the performance of SunPower solar panels?
You can easily see the performance of a solar panel when viewing a solar panel data sheet. We evaluate the performance of Sunpower solar panels based on the temperature coefficient (Pmax) and tolerance.
The X-21 series, the best Sunpower segment, has a Pmax of.0.30% / ° C. Everything below.0.30% / ° C is recommended. For example, a loss of 9% occurs at a temperature of 25 degrees (55 degrees in solar panels), while with other panels this is quickly 15%.
No Sunpower solar panel has a negative tolerance. The X-21 series has a positive tolerance of 5%. This means that solar panels yield up to 5% better than indicated. With a series of 345 watts X21 this is a bonus of more than 17 watts!
Solar energy solar panels
The Sunpower range consists of 2 series:
Sunpower series x
This is the Sunpower masterpiece, especially the X-22. The X series is the result of 25 years of research. The X series consists of Maxon solar cells that are manufactured with as little metal as possible. As a result, they absorb more sunlight and achieve a performance of not less than 21.5%.
The X series has been on the market since 2013 and, since then, there is no single brand of solar panels that approaches the quality of this solar panel.
Because the efficiency is so high, you get up to 45% more electricity from a solar panel than any other brand. The X-21 is entering
X-20 : the first panel of the X series is the X-20. With a yield of 20.3%, this monocrystalline solar panel is still among the best solar panels today, although it was produced in 2010. The panel supplies 327 W of power and has a tolerance of.3% / 5%.
X-21 : The X-21 model is the successor of the X-20. With a yield of 21% and a positive tolerance of 5%. There are 2 versions, the X21 Signature Black with a power of 335W per panel and the standard version of X21 with a power of 345W.
The Signature Black panel is often chosen because of its design, which looks much tighter and is better suited to dark ceilings. The X-21 won the most efficient solar panel award in 2012.
The solar cells in the X-21 panels are built on Maxeon technology. This solar cell is built from a solid copper frame, which makes it virtually impossible for corrosion to occur or for the material to degrade.
X-22 : the X-22 model is Sunpower’s top solar panel. With an unprecedented efficiency of 22.1% and a positive tolerance of 5%, it offers no less than 360 watts of power per panel.
The Pmax is also unprecedentedly low with.0.299% / o C. Like the entire X series, the panel comes with a product warranty of 25 years and a power guarantee of.0.4% for 25 years.
E-20 : The Sunpower E-20 is a monocrystalline solar panel with Maxon Gen II solar cells. Like all Sunpower solar panels, performance is high, with no less than 20.4%. An E-20 panel provides 327W of power, which makes it an ideal solar panel when the available space is not large.
Installers of solar panels Sunpower.
Many installers today offer Sunpower premium solar panels in their range. Some installers consciously choose to work alone with Sunpower, with other installers this is part of their assortment, which usually contains 4-5 marks. Below are some reliable Sunpower installers.
SunPower Solar Panels vs. LG Solar Panels
If you are considering installing a solar system at your home or place of business, then you have many factors to consider. The paramount factor to many buyers is which solar panels (referred to as ‘modules’ in the industry) to choose. During your solar research, you will undoubtedly come across two solar module manufacturers: SunPower and LG. Both are widely recognized as high-end modules with SunPower leading the way. So which should you choose?
SunPower is more expensive. Partnered with roughly 200 solar installation companies across the nation, Solar.com sees SunPower pricing to be 0.57 per Watt higher than LG. This equates to a 3,420 on the total cost for an average sized residential solar system (6,000 Watts). This is a significant cost increase for most homeowners or business owners so it’s important to understand what differentiates the two brands and their products.
Efficiency Nominal Power
Solar module efficiency refers to the portion of energy in the form of sunlight that can be converted via photovoltaics into electricity. SunPower modules achieve a high of 22.2% with an average of 20.6%, while LG’s current products can achieve 19.5% with an average of 18.3% on the efficiency scale.
Nominal power, rated in DC Watts, is an important characteristic of a solar module to consider. SunPower’s modules range from 327W – 360W, while LG’s residential modules ranges from 275W – 320W. LG does currently offer modules as high as 370W, but these are larger in size and are typically used for commercial solar projects. Nominal power is significant because if you are a homeowner who needs a 6,000 W system to offset your electricity consumption from the Utility, you would need 17 modules with SunPower or 19 modules with LG.
Depending on how much available space you have on your roof, this may impact your decision. Also, if you plan to increase your energy consumption in the future (e.g. plan to have kids, want to get an Electric Vehicle, etc.) you may want to choose SunPower modules so you have enough space to install more modules in the future (if roof space is a constraint).
Degradation is another characteristic of modules and it refers to their power decline over time. Most manufacturers guarantee their modules to degrade no more than 0.7% each year for 25 years. At 0.25%, SunPower’s X Series has the lowest degradation rates of any manufacturer. LG is better than average at 0.6%. After 25 years, a SunPower solar system is guaranteed to produce 92% of the electricity that it did at the time of installation while an LG solar system is guaranteed to produce 83.6%. The difference here may seem insignificant, but over the course of 25 years, this can add up.
Homeowners and business owners who are concerned with aesthetics, often choose an “all black” module with a black frame and black back sheet. SunPower and LG both offer this style. However, SunPower’s all black module has a nominal power rating of 335 Watts, while LG ‘s is rated at 305 Watts. With a similar appearance, your decision to choose SunPower or LG should rely more on available roof space and the solar system size you need.
Warranty and Bankability
These two factors are closely related and should be discussed together. Warranties provide both security and peace of mind to consumers, but if the manufacturer goes belly up, their warranty is meaningless. SunPower leads the industry with their 25/25/25 warranty, covering performance, product defects, and labor. LG covers the performance for 25 years and any product defects and labor costs for 12 years. If you have a defective solar module after 18 years, SunPower will send someone out to replace the module at no cost to you, however, LG will not. That said, If you chose an installation company that has a 25-year bumper-to-bumper workmanship warranty, then this is a moot point.
Now let’s take a look at the bankability of these two companies. Everyone has heard of LG. You may have a microwave, television, or refrigerator in your home that is made by LG Electronics. Unless you’ve looked into going solar, you likely have not heard of SunPower. Looking at the NASDAQ, SunPower’s stock price has steadily declined over the past year from 24 in March 2016 to roughly 8 today. LG stock have remained steady during that time period and have even risen slightly from 10 to 12. The solar industry is still relatively immature and changes in policy and advancements in technologies can have a direct impact on manufacturers. Soon after Congress extended the 30% federal investment tax credit for solar in December 2015, SunPower announced 1,200 layoffs and shares quickly dropped over 30% in trading. The diverse portfolio of LG protects itself from any changes specific to the solar industry, arguably, making them a more stable and bankable company.
Coming Soon from LG
LG has developed residential solar modules that seem to truly rival SunPower. The LG NeON® R modules appear to close the gap and even exceed many of the advantages that SunPower currently has over other products. If LG keeps the price point near the current modules they offer, homeowners and business owners may have a tough time justifying SunPower’s higher cost.
Going solar can be a daunting task to many as there are many things to consider. The solar modules you choose are an important consideration, but many other factors deserve more attention. Contact Solar.com who will analyze everything for you. If you’re ready to go solar and deciding between SunPower and LG is the last piece of the puzzle, Solar.com will find you the best bids for both brands in your area so you can make an informed decision.
Have more questions or want to speak to someone regarding the best solar panels for your home? Please call (888) 454-9979.
This article was updated on October 20th, 2017 to reflect SunPower’s latest degradation rate and power warranty.
SunPower X Series Solar Panels: Should You Choose Them for Your Project?
X Series solar panels by SunPower are among the best photovoltaic (PV) modules available. They feature cutting-edge technology and certified durability. These modules are among the different solar solutions by SunPower, delivering 60% more energy than conventional modules during their 25-year lifespan.
If you want to learn more about the SunPower X-Series, this SunPower X-Series review is for you. Here we will analyze the technology featured in these modules, their technical specs, strengths advantages, compare them against other options, and explain which applications are better suited for them.
Technology featured in the SunPower X Series solar panels
SunPower X-Series feature Maxeon Gen III solar cells, one outstanding solar technology available. In this section, we explain how this technology works.
Maxeon Gen III Solar Cell
Maxeon Gen III Solar Cells feature cutting-edge technology with a 24.3% efficiency, delivering 25% to 35% more power than traditional cells. The technology implements high-quality monocrystalline silicon wafers with a black antireflection coating at the front, and Interdigitated Back Contact (IBC) or All-Back contact technology with a copper metal grid with tin-coating at the back of the cell.
These cells make SunPower X Series modules resistant to Light-Induce Degradation (LID) while delivering a low-temperature coefficient and great performance in broad light spectrums. The cells are also eco-friendly by featuring entirely lead-free components.
Technical specs details of the X Series solar panels
Residential X-Series includes the X21 and X22 variations. The X21 features a traditional design with superior aesthetics and a power output of 335W, while the X22 modules are the latest technology, featuring a superior performance with a power output of up to 360W.
- Module Efficiency: Up to 22.2%.
- Nominal Output Power: 335W – 360W.
- Temperature Coefficient:.0.29%/ºC
- Operating Temperature:.40ºF to 185ºF
- Dimensions: 61.3 x 41.2 x 1.8 in.
Residential SunPower X Series modules are designed to deliver more power with fewer modules installed. Featuring 96 Maxeon III solar cells with a conversion efficiency of up to 22.2%, X Series modules can deliver up to 360W for the highest power-rated module in the series, while the All-Black design can deliver up to 335W.
Each SunPower X Series module features a Class A appearance and it is protected by a high-transmission tempered anti-reflective glass with a Class 1 black anodized frame. The modules are resistant to extreme climates and are covered by SunPower’s 25-year warranty.
Commercial X-Series features a slight variation between the X21 and the X22 options. The X21 features 128 solar cells for a power output of up to 470W, while the X22 modules feature 96 cells for an output of 360W.
- Module Efficiency: Up to 22.2%.
- Nominal Output Power: 360W / 445W – 470W
- Temperature Coefficient:.0.29%/ºC
- Operating Temperature:.40ºF to 185ºF
- Dimensions: 61.4 x 41.2 x 1.8 in. / 81.4 x 41.2 x 1.8 in.
Commercial SunPower X-Series is designed for commercial and utility-scale applications, featuring 96 and 128 Maxeon Gen III solar cells to deliver 360W for the X22 and 445W-470W for the X21 options. The size between both options also varies.
These modules feature a B Class appearance and are protected by a high-transmission tempered anti-reflective glass with a Class 2 silver anodized frame. They have a slightly lower resistance to extreme climates than residential variations but are also covered by a 25-year warranty.
Strengths advantages of the SunPower X-Series
SunPower X-series features many strengths and advantages, making them excellent solar solutions for various applications. These are some of their main strengths advantages:
Durable Resistant Design
A tin-copper and slightly flexible design for the Maxeon Gen III solar cells makes the SunPower X-Series resistant to corrosion and cracks. They are also resistant to Light-Induced degradation, resulting in a higher power energy output of 2% to 3%.
energy is delivered during its lifetime
Combining high durability with outstanding performance, SunPower X Series modules can deliver 60% more energy compared to traditional modules. In the first year, these modules deliver 45% more power than traditional options, but by their 25 th year, they are producing 81% more power than conventional ones.
Better performance at high temperatures
Maxeon Gen III solar cells feature a low-temperature coefficient of.0.29%/ºC. This means that SunPower X Series modules can produce around 1-2% more energy at a high temperature of 35-40ºC, making them extremely suitable for regions with hot climates.
Increased performance under different light conditions
The performance of SunPower X Series modules is improved in overcast and low-light conditions, thanks to the cutting-edge technology in Maxeon Gen III solar cells. This increases the energy output of the SunPower X Series by around 1% compared to traditional modules.
SunPower X-Series are designed to be lasting and durable, which are covered by SunPower’s 25-year warranty for the product and performance.
Highly aesthetic design
The X21-Series features the key signature All-Black design of SunPower, delivering a great power output without disrupting the aesthetic of the house. This feature makes them a unique solar solution in locations where aesthetics is a key factor for the installation of PV modules.
Comparing SunPower X-Series
To comprehend the reach of the SunPower X-Series, it is better to compare them against competitor options and even other modules designed by SunPower. In this section, we make these comparisons.
SunPower X-Series vs. 360W DNA 120 Aptos Solar
DNA 120 solar panels by Aptos Solar, are a popular option in the U.S. as well that competes against the SunPower X-Series. Let us contrast both options against each other.
Both companies have designed PV modules featuring a 360W power output, but they feature different technologies. Maxeon Gen III solar cells have an efficiency of 22.2%, while DNA split cells only reach an efficiency of 19.73%. This makes that for Aptos Solar modules to produce 360W, they have to be larger and 4.09 lbs. heavier than the SunPower X-Series.
The temperature coefficient is another key difference between both modules. With a temperature coefficient of.0.29%/ºC, SunPower X-Series has a better performance in hot climates than DNA 120. The only aspect where Aptos Solar’s DNA 120 surpasses SunPower X Series is in the warranty; these modules feature a warranty 5 years longer, for a total warranty of 30 years.
SunPower X-Series vs. M-Series
Comparing the SunPower X-Series vs. M-Series, allows us to learn key differences between the two solar solutions designed by SunPower.
There are several differences between the SunPower X-Series vs. M-Series, like their technology, power output, and signal output type. M Series modules feature 66 Maxeon Gen VI cells which are larger and feature a conversion efficiency of 22.8%. The M-Series featuring a larger size, reach a power output of 440W, which is far superior to the 360W of the X-Series.
The built-in inverter of the M-Series creates another major difference. This inverter produces an AC output of M Series modules, instead of the typical DC output in the SunPower X-Series. While these are similar panels, the M-Series has several advantages over the X Series.
SunPower X-Series vs. A-Series
The SunPower X-Series vs. A-Series generates another interesting contrast. The A-Series is highly similar to the M-Series, including the AC output but featuring a slightly older Maxeon solar cell technology.
SunPower A-Series features Maxeon Gen V cells with an efficiency of 22.8%, featuring 65% larger cells than the Maxeon Gen III. The A-Series also features a larger size and weight, but instead of having the 360W for the M-Series, the nominal output goes up to 425W.
Performance in hot climates remains the same since both of them feature the same temperature coefficient. They also feature the same warranty.
When to choose the X-Series for your project?
SunPower X Series modules feature older technology than the A- and M-Series, but they have similar conversion efficiencies and are far better than conventional options in the market.
Residential projects looking to produce higher power outputs on small rooftops can benefit from the SunPower X-Series. These modules can be a game changer on rooftops with limited space since smaller modules can be rearranged in different shapes to better fit the roof. This makes it easier to fit more X Series modules than A- or M-Series which have a larger size.