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As of August 5, 2024, SunPower declared Chapter 11 bankruptcy and announced its plan to sell parts of its business to Complete Solaria. As a result, SunPower has stopped accepting new customers, with its partners stepping in to handle residential solar installations.
A solar company''s bankruptcy filing can affect the warranties for your solar system. Learn more in our article, What do I do if my solar installer goes out of business?
SunPower had four decades of experience before the company filed for bankruptcy in August 2024. Its solar panels appealed to those looking to install a highly efficient solar panel system to integrate with other products, like a solar battery. From solar panels to hardware, SunPower most recently sold complete solar energy systems for residential and commercial applications. At the heart of its operations was its cell technology, the most efficient on the market.
Complete Solar purchased some of SunPower''s assets, but the future of its operations is still unclear. The good news is that you can still take advantage of SunPower''s legendary solar cell technology through its former manufacturer turned independent business, Maxeon Solar Technologies.
SunPower''s cell technology earned the company its reputation as the most efficient on the market. Although it stopped manufacturing its own products in 2020, SunPower designed three lines of residential solar panels: SunPower Maxeon (M-Series), SunPower Performance (P-Series), and the U-Series.
Maxeon Solar Technologies, SunPower''s former manufacturing arm, produced the Maxeon and Performance panels, but as of 2024, you can purchase Maxeon solar panels from other installers. A few different companies, including Waaree, manufactured the more budget-friendly U-Series panels.
Efficiency: How well a solar panel captures sunlight and converts it into electricity for your home, expressed as a percentage (i.e., 22.2%). The higher, the better.
Temperature coefficient: How well your solar panels perform in less-than-ideal conditions, expressed as a percentage per degree (i.e., 0.34% / °C). The lower, the better.
Warranty: Guarantees that the company will replace your panel if it fails due to manufacturing defects or environmental issues. Warranties also guarantee a certain amount of production throughout the 25+ year term.
*Price reflects the average price per watt based on more than 10,000 real-world quotes on the EnergySage Marketplace. It is not specific to the model listed.
Maxeon''s technology, which SunPower used for some of its panels, is the best of the best. The monocrystalline, half-cut cell structure reduces heat loss because the cells are smaller, making them more efficient than conventional panels. The Maxeon-produced solar panels enhance efficiency even more through interdigitated back contact (IBC) and shingled solar cell technology.
IBC cells have electrical contacts on the back rather than on the front like conventional solar cells. This eliminates any metal grid-like lines on the front of the panel, allowing for the entire front of the cell to absorb sunlight. The back of the panel is held together with a layer of durable copper to prevent corrosion and other common causes of failure.
Shingled solar cells are regular cells cut into strips and arranged like shingles on a roof. Instead of using metal ribbons to connect the cells, shingled solar cells use an electrically conductive adhesive (ECA), boosting flexibility and durability.
The U-Series panel used Passivated Emitter and Rear Contact (PERC) solar cells. PERC cells include a back surface layer that reflects light back through the cell, reduces heat absorption, and reduces electron recombination, all of which lead to improved panel efficiency.
SunPower solar panels came with one of the longest and most comprehensive warranties on the market. The 25-year Complete Confidence warranty covered not just panels but inverters and racking equipment, too. The warranty guaranteed panel production of at least 85%–92% of their original output by the end of the term.
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