SunPower solar panels are still some of the most efficient panels sold in the United States, commonly rated up to 22.8%. See our dedicated breakdown of how efficient SunPower panels actually are for the full numbers. But the company behind the name is not the same one that built that reputation. SunPower Corporation filed for Chapter 11 bankruptcy in August 2024, and the SunPower brand you see today is owned and operated by a different company, SunPower Inc., formerly known as Complete Solaria. For the full story on that transition, see whether SunPower is still in business in 2026.
This review covers what SunPower panels actually offer in 2026, the full ownership timeline so you know exactly who you would be buying from, real spec and warranty numbers, and how the panels compare on price to other high-efficiency brands. If you are in California, pair this with our guide to California’s NEM 3.0 rules, since your net metering plan affects the payback math as much as the panel you choose. All figures below are checked against manufacturer and industry sources as of September 25, 2026.
SunPower Solar Panels: Quick Summary
| Item | Detail |
|---|---|
| Panel efficiency range | 18.9% to 24.1%, depending on the line |
| Top efficiency | Up to 22.8% on flagship residential panels |
| Power output range | 355 W to 455 W, depending on the model |
| Cell technology | Interdigitated back contact (IBC) and shingled cell designs, made by Maxeon Solar Technologies |
| Standard warranty | 25 years on panels, product and performance |
| Current owner | SunPower Inc. (formerly Complete Solaria), a different legal entity than the original SunPower Corporation |
| Primary installer brand | Blue Raven Solar, operating in 45 states as of late 2025 |
| Price position | Premium tier, generally higher per watt than Qcells, REC Group and other top-efficiency brands |
Who Owns SunPower Now? The Full Timeline
If you are researching SunPower, you have probably noticed conflicting information. Some pages describe record efficiency ratings. Others mention a bankruptcy. That confusion comes from a real corporate history, not a data error. Here is the complete sequence.
| Date | Event |
|---|---|
| 2020 | SunPower spins off its manufacturing arm, Maxeon Solar Technologies, as a separate company. Maxeon continues producing SunPower-branded panels under an exclusive agreement. |
| March 2024 | SunPower and Maxeon’s exclusive supply agreement ends, freeing Maxeon to sell its panels through other installers. |
| April 2024 | SunPower announces it is exiting residential direct sales amid mounting financial pressure. |
| August 2024 | SunPower Corporation files for Chapter 11 bankruptcy and puts its key assets up for sale, including the Blue Raven Solar business, its New Homes division and its dealer network. |
| September 2024 | Complete Solaria wins the bankruptcy auction with a $45 million bid for those assets. |
| April 2025 | Complete Solaria rebrands itself as SunPower and changes its Nasdaq ticker to SPWR. |
| September 2025 | The new SunPower Inc. acquires Sunder Energy, expanding its installation footprint from 22 to 45 states. |
| October 2025 | Complete Solaria formally changes its legal name to SunPower Inc. |
| 2026 | SunPower Inc. operates primarily through its Blue Raven Solar brand and reports its first profitable quarter in several years. |
The practical takeaway: the company operating as SunPower today is not the original SunPower Corporation. It is a publicly traded company (Nasdaq: SPWR) built from Complete Solaria and the assets it purchased out of bankruptcy, and it does most of its residential installation work under the Blue Raven Solar name.
What Happened to SunPower’s Warranty?
- Panels made by Maxeon: Maxeon has committed to honoring product warranty coverage on the panels it manufactured, regardless of which company sold them.
- Other system components: Warranty coverage on inverters, racking, and other non-Maxeon parts depends on when your system was installed and by whom. Systems installed by SunPower Inc. or Blue Raven Solar after the 2024 transition are generally covered under current terms.
- Older systems: If your system predates the 2024 bankruptcy and you financed it through a lender rather than paying cash, you may need to work directly with that lender for warranty claims rather than the current SunPower company.
If you already have a SunPower system and are unsure where you stand, our guide on SunPower warranty coverage after the bankruptcy walks through how to check your specific situation.
SunPower Panel Specs by Line
SunPower panels are built around Maxeon’s cell technology, sold in a few different tiers. Here is how the main residential lines compare.
| Line | Cell type | Power output | Efficiency | Warranty |
|---|---|---|---|---|
| Maxeon 6 / 7 | Interdigitated back contact (IBC) | 410 to 445 W | 21.2% to 24.1% | 25 years |
| Maxeon 3 | Interdigitated back contact (IBC) | 355 to 430 W | 20.1% to 22.7% | 25 years |
| Performance 6 / 7 | Shingled cell, some bifacial | 395 to 455 W | 20.1% to 22.4% | 25 years |
| Performance 3 | Shingled cell | 370 to 385 W | 18.9% to 19.6% | 25 years |
| U Series | Mono PERC | 395 to 415 W | 19.8% to 20.8% | 25 years |
- IBC cells move the electrical contacts to the back of the panel, so there are no visible grid lines on the front, and the full cell surface can absorb sunlight.
- Shingled cells are cut into strips and layered like roof shingles, connected with a conductive adhesive instead of metal ribbons, which improves durability and flexibility.
- Mono PERC cells, used in the more budget-friendly U Series, add a reflective back layer that bounces unused light back through the cell for a modest efficiency boost.
For a deeper breakdown of specific wattages by model year, see our guide to SunPower panel wattage explained.
How SunPower Compares to Other High-Efficiency Brands
| SunPower Maxeon (~440 W) | Qcells Q.Tron (~440 W) | REC Alpha Pure-R (~420 W) | |
|---|---|---|---|
| Efficiency | 22.8% | 22.5% | 21.8% |
| Price position | Highest per watt of the three | Mid-range | Lowest per watt of the three |
| Warranty | 25 years | 25 years | 25 years |
| Temperature coefficient | -0.29%/degC | -0.30%/degC | -0.24%/degC |
The efficiency gap between these three brands is small, generally about one percentage point. On a typical roof with adequate unshaded space, that difference translates into a modest real-world gain, not a dramatic one. Efficiency matters most when your roof is small, oddly shaped, or partially shaded, since higher-efficiency panels produce more power per square foot. When roof space is not the constraint, price per watt and the strength of the company standing behind the warranty usually matter more.
SunPower Pros and Cons in 2026
| Pros | Cons |
|---|---|
| • Among the highest efficiency ratings available for residential panels • 25-year product and performance warranty • Maxeon’s IBC technology has a strong long-term reliability track record. • Good option for small or oddly shaped roofs where every watt per square foot counts • Now operating in 45 states through Blue Raven Solar | • Higher price per watt than most competing high-efficiency brands. • The current company is a different legal entity than the one that built the brand’s reputation. • Warranty terms depend on when and by whom your system was installed. • Recent corporate history adds a layer of due diligence most other brands do not require |
Is SunPower the Right Choice for You?
- Choose SunPower or Maxeon-based panels if you have limited or partially shaded roof space and need to maximize output per panel.
- Compare other high-efficiency brands like Qcells or REC if you want similar performance at a lower price per watt.
- Ask specific questions before signing about which entity is installing your system, what your warranty actually covers, and who to contact if something goes wrong. This applies whether you are considering SunPower, Blue Raven Solar, or any other brand with a complex corporate history.
If you already have a SunPower system and are considering an upgrade rather than a new install, see our guide on expanding or upgrading an existing SunPower system.
Getting a Second Quote
Given SunPower’s ownership changes, many homeowners are widening their search to include factory-direct installers with a more straightforward, uninterrupted track record. US Power is a CSLB-licensed, factory-direct Qcells installer serving California, Texas, Florida, and Illinois, with American-made panels, a 25-year comprehensive warranty covering panels, workmanship, and performance, and no third-party dealer layer between you and the manufacturer.
Comparing quotes costs nothing and gives you real numbers for your specific roof rather than a brand’s marketing claims. See available solar and battery packages or learn why homeowners are choosing a factory-direct alternative.
Frequently Asked Questions About SunPower Solar Panels
Is SunPower still in business in 2026?
Yes. SunPower Inc. (Nasdaq: SPWR), formerly Complete Solaria, operates today primarily through its Blue Raven Solar brand across 45 states. It is a different legal entity than the original SunPower Corporation, which filed for Chapter 11 bankruptcy in August 2024.
Are SunPower panels still the most efficient on the market?
SunPower panels remain highly competitive, commonly rated up to 22.8% efficiency. Other manufacturers, including Qcells and REC Group, now offer panels in a similar high-efficiency range, so it is worth comparing specific model specs rather than relying on brand reputation alone.
What is the difference between old SunPower and new SunPower?
The original SunPower Corporation filed for bankruptcy in August 2024 and sold key assets, including the Blue Raven Solar business, to Complete Solaria. Complete Solaria rebranded as SunPower in April 2025 and formally changed its legal name to SunPower Inc. in October 2025. The brand name is the same, but the company is not.
Is my SunPower warranty still valid?
Panel warranties on Maxeon-manufactured panels are generally still honored by Maxeon regardless of which company sold them. Coverage on other components like inverters depends on when your system was installed and how it was financed. Check with your original installer, lender or Maxeon directly to confirm your specific coverage.
Who makes SunPower solar panels?
SunPower-branded panels are manufactured by Maxeon Solar Technologies, which split from SunPower as an independent company in 2020. Since March 2024, Maxeon has also sold its panels through other installers, not exclusively under the SunPower brand.
Is it better to buy SunPower or a different brand?
That depends on your priorities. If maximizing output on a small or shaded roof matters most, SunPower’s high efficiency is a real advantage. If you want similar performance at a lower price per watt from a company with a more stable recent ownership history, brands like Qcells or REC Group are worth a direct comparison quote.
What states does SunPower operate in now?
Following its September 2025 acquisition of Sunder Energy, SunPower Inc. expanded its installation footprint from 22 to 45 states, operating primarily under the Blue Raven Solar brand.
