What are the best models of Sunpower panels you can purchase for your home?

Published on 19 Sep, 2018 by Zeeshan Hyder

3 minutes read

Categories: Solar panels


SunPower has been an industry leader in solar technologies since 1985. SunPower panels are easily available and offer great performance. Sunpower has consistently produced the most efficient residential solar panels on the market. With a strong product warranty and a guaranteed 25-year power output, SunPower is a great choice for any type of solar owner, from residential to Industrial.

They are not the cheapest solar panels but their quality is without peer.

Get live quotes with Sunpower solar panels from solar installers near you

 

How do I compare models of Sunpower solar panels to models from other manufacturers?

Our sister site SolarReviews has a solar panel comparison tool to show the pros and cons of the different residential solar panels brands sold in the US in 2018.

This allows you to compare two solar panels (either from the same or different manufacturers) side by side including the efficiency of each model, the wattage. Voc, Isc and the warranty information.

SunPower X-series panels

The X-series is SunPower’s top tier of panels with an efficiency of 20.3% - 22.7%. Alongside SunPower’s standard 25-year product warranty, the X-series has a power output warranty of 92% even after 25 years and are rated to withstand high heat conditions. There are currently 16 available X-series models.

Model

Module Efficiency

SPR-X21-470-COM

21.7%

SPR-X21-460-COM

21.3%

SPR-X20-445-COM

20.1%

SPR-X22-370

22.7%

SPR-X22-370-COM

22.7%

SPR-X22-360

22.7%

SPR-X22-360-COM

22.1%

SPR-X21-350-BLK

21.5%

SPR-X21-345

21.2%

SPR-X21-345-COM

21.2%

SPR-X21-335-BLK

21.0%

SPR-X21-335

21.0%

SPR-X21-335-COM

21.0%

SPR-X20-327-BLK

20.1%

SPR-X20-327

20.1%

SPR-X20-327-COM

20.1%

Note that models with "-COM" at the end of their names are for commercial use.

SunPower E-series panels

While not being as resistant to high-heat conditions as the X-series the E-series are also top tier panels with efficiencies ranging from 18.1% - 20.4%. The E-series panels still come with SunPower's strong warranty. There are currently 10 models available in the E-series.

Model

Module Efficiency

SPR-E20-327

20.4%

SPR-E20-327-COM

20.3%

SPR-E19-320-BLK

19.9%

SPR-E19-320

19.9%

SPR-E19-310-COM

19.3%

SPR-E19-315-BLK

19.7%

SPR-E18-300-BLK

18.4%

SPR-E18-300

18.4%

SPR-E20-435-COM

20.3%

SPR-E19-410-COM

19.1%

What is the best model of SunPower panel on the market?

It's hard to say which panel is the "best" since everyone has different needs and priorities when buying a solar system.

However, what is true is that it is usually the case that the most efficient module from a solar panel offered by a manufacturer is usually their most expensive.

My tip would be to usually buy the lowest wattage panel in a series because almost all of these panels would have fallen just short of being rated at a higher wattage. So in the E-Series, I would buy the SPR-E19-310-COM.

In the X series, I would buy the SPR-X21-335. In both cases, these are often cheaper than the other solar panels in the series as most people usually want the more efficient higher wattage panels in the series.

If you are looking to use the least roof space possible and the cost isn't an issue going for the highest efficiency X-series panel would be the best choice. However, if you have a larger roof and looking to save money an E-series model is probably the best option.

 

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Author: Zeeshan Hyder

Zeeshan is passionate about promoting renewable energy and tackling climate change. He developed these interests while studying at beautiful Middlebury College, Vermont, which has a strong focus on sustainability. I have previously worked in the humanitarian sector, communications and journalism.