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TopTenREVIEWS - Gold Award - Awarded for excellence in design, useability and feature set

The aptly named SunPower truly is a powerful company when it comes to providing energy for a home. As evidence, take a quick look at the high quality and design of this firm's solar panels, the excellent solar efficiency of its best solar panels, the company's reassuring warranty and the pleasing aesthetics of these photovoltaic modules. The SunPower E20/327 is a top-rated product, easily winning our TopTenREVIEWS Gold Award.

Unlike many other solar panel companies, SunPower does not operate by allowing you to simply buy some panels and turn installation into a DIY project. In fact, the company does not offer official quotes regarding the cost of buying one panel. Instead, this company relies on designated solar panel professionals in a particular geographic area to handle all aspects of any SunPower transaction. If you choose SunPower, you'll meet with a local professional who will examine your roof, work with you on design, obtain the necessary permits, help arrange for rebates that you might get from various governmental agencies and then install the panels.

Solar Efficiency:
10/10
Compare
SunPower E20/327
Kyocera KD315GX-LPB
Canadian Solar CS6X-305M
Grape Solar 390W
Grape Solar 250W
Suntech STP255S-20/Wdb
Samsung LPC250SM
Sharp ND-Q245F
Lumos LSX 250-60M
Sharp ND-F2Q235
10
8.8
8.5
8
8
8.3
8.3
7.5
6.8
6.3

The SunPower E20/327 solar panel is a first-class addition to any residential rooftop because it generates an extraordinary amount of electricity very efficiently – in fact, these solar panels for your home boast an impressive 20.1 percent efficiency rating. This SunPower model outpaces the rest of the market with its innovations, design and the resulting product, which provides an exceptionally high amount of energy.

The 40-year-old company attributes the potency and superior performance of these panels to its trademarked Maxeon solar cell technology, which combined with larger and more efficient cells and a unique anti-reflective coating heightens the overall absorption of sunlight.

The power generated by the SunPower E20/327 panels cannot help but make a significant dent in the overall cost of your electric bill. No matter what part of the country you live in or how much sunshine you get daily, these panels will absorb plenty of sunlight and put the solar power it to use in your home, running everything from hair dryers to electric ovens to TV sets. In addition, it is likely you can get worthwhile financial benefits if your local utility makes use of net metering, which means you can sell any excess electricity generated by your solar panel back to the electric company.

For an extra cost, you can get the SunPower Consumption Monitoring Kit, which permits you to track how your solar panel system is functioning. You can keep an eye on how well your solar panels are generating electricity, keep tabs on your electrical use and much more. The options available with this extra package include an interactive website, apps for smartphones and other mobile devices, and automatic notices to your solar installer should your system for some reason not work correctly.

Durability:
10/10
Compare
SunPower E20/327
Kyocera KD315GX-LPB
Canadian Solar CS6X-305M
Grape Solar 390W
Grape Solar 250W
Suntech STP255S-20/Wdb
Samsung LPC250SM
Sharp ND-Q245F
Lumos LSX 250-60M
Sharp ND-F2Q235
10
9
8.8
8.5
8.5
8.3
8.3
8
7.5
7.3

SunPower offers one of the finest and most comprehensive warranties in the industry. With these solar panels for your home, you get an unprecedented warranty that covers the product itself as well as the workmanship for 25 years. This coverage is considerably longer than the other products we reviewed – the industry standard is 5-10 years for these items. The warranty assumes that the SunPower modules were installed correctly and have undergone normal use.

The SunPower warranty also maintains the power output of the panels will be at 95 percent of the minimum peak power rating for the first five years. The power output will decline over time, as it will with any solar panel. However, SunPower's warranty expects a decline of no more than 0.4 percent per year for the subsequent 20 years. Accordingly, the power output at the end of the 25-year warranty to be at least 87 percent of the minimum peak power rating.

SunPower pledges to repair or replace any solar panels that do not live up to these standards, or if that is not practical, it will refund the purchase price of a defective solar panel. SunPower officials will determine whether any reported defects actually exist and whether they meet the terms of the warranty.

These photovoltaic modules can handle a maximum load of pressure from something like snow at a level of 113 pounds per square foot. Its impact resistance is such that it can withstand hailstones 1 inch in diameter whipped around by winds up to 52 mph.

Features:
9.8/10
Compare
SunPower E20/327
Kyocera KD315GX-LPB
Canadian Solar CS6X-305M
Grape Solar 390W
Grape Solar 250W
Suntech STP255S-20/Wdb
Samsung LPC250SM
Sharp ND-Q245F
Lumos LSX 250-60M
Sharp ND-F2Q235
9.8
9.8
9.3
9.3
9.3
9.1
9
8.8
8.5
8.3

These sturdy solar panels can withstand temperatures as low as 40 degrees F below zero, which is standard with solar panel kits. They also can handle hot weather, withstanding temperatures of 185 degrees F, which is a fairly common standard in the solar world. The cover material is tempered glass and the frame is made of anodized aluminum.

These panels are essentially maintenance-free. If a considerable amount of dust and dirt ends up on your roof, you can clean these solar modules by rinsing them with water during times when the panels are cool. Certain commercial glass cleaners or a mild soap and water solution also will work. Otherwise, rainwater should do the job nicely.

Dimensions:
9.3/10
Compare
SunPower E20/327
Kyocera KD315GX-LPB
Canadian Solar CS6X-305M
Grape Solar 390W
Grape Solar 250W
Suntech STP255S-20/Wdb
Samsung LPC250SM
Sharp ND-Q245F
Lumos LSX 250-60M
Sharp ND-F2Q235
9.3
9
8.8
8.8
8.5
8.8
8.8
8.8
8.8
8.8

The SunPower E20/327 is one of the smallest solar panels we reviewed, yet it is the most powerful in terms of solar efficiency and offers a greater maximum power voltage and healthy maximum power wattage. Its dimensions are 61.39 inches long, 41.18 inches wide and 1.81 inches deep. Each panel weighs 41 pounds.

 

 

Help & Support:
10/10
Compare
SunPower E20/327
Kyocera KD315GX-LPB
Canadian Solar CS6X-305M
Grape Solar 390W
Grape Solar 250W
Suntech STP255S-20/Wdb
Samsung LPC250SM
Sharp ND-Q245F
Lumos LSX 250-60M
Sharp ND-F2Q235
10
9.5
9.3
9.3
9.3
8
8
8
9.3
8

You get a full complement of customer assistance and communication with this California-based company that has regional offices throughout the U.S. If you encounter problems or have questions, you can call or email to get information. For quick answers, the company’s website offers a live chat service titled. The firm also provides a FAQs section on its website, informative articles about solar power in general and a timely and helpful blog.

Summary:

The SunPower E20/327 are the best solar panels we reviewed. Their solar efficiency in unmatched, their warranty is exceptional, the company provides first-rate customer service and these modules look great once they are installed on a rooftop. You will be saving money, helping the environment and adding an aesthetically pleasing upgrade to your home with these solar panels. With the SunPower E20/327 panels, you really cannot go wrong.

 
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Appliances » Other-Household » Solar Panels Review » SunPower E20/327
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SunPower E20/327

Pros
This product has an exceptional warranty.

Cons
This is a high-end initial purchase that might be beyond the pocketbooks of some consumers, although it does save money on utility bills in the end.

The Verdict
: 9.88/10

The SunPower E20/327 solar panels are a first-rate choice for residential use due to their superb solar efficiency, reassuring warranty and excellent design.