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Everything you need to know about SunPower solar panels and batteries in 2022

Updated: September 13, 2022

Our expert review

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Our scoring methodology rates solar manufacturing companies on technical factors that are unlikely to be considered in customer reviews, offering consumers valuable insight into the actual quality of a solar brand.

Elite

SunPower has for some time been the leading brand of solar panels in terms of efficiency and electrical specifications.

Originally, the solar panels were made in America but over recent years cost cutting measures moved production to Mexico and Malaysia. The secret of SunPower has always been that they held patents over their “Interdigitated Back Contact" solar cells, known as IBC solar cells. IBC cells are the currently most efficient solar cells in mainstream production.

In 2020, SunPower as we knew it split into two separate listed entities, SunPower and Maxeon Solar Technologies. From now on, Maxeon will make the solar panels, and SunPower will run a retail dealer network selling integrated solar and energy storage solutions. However, the demerger has raised more questions than it has answered. Who actually owns the cell technology now? And will SunPower now start selling panels made by other manufacturers to reduce the cost of their systems?

The official reason given for the demerger is to allow each company to follow their strengths, but a skeptic may say that the real reason is that the manufacturing side of the business is unprofitable and is facing rising competition for other Tier 1 solar manufacturing companies that are now making solar panels very close in efficiency to the Maxeon/SunPower panels, all while using cheaper cell technologies. In short, it appears that the Maxeon spin-off is really about getting out of the manufacturing business before it lost its remaining competitive advantage, i.e. its leadership in cell efficiency.

Our concern now as a reviewer of the SunPower and Maxeon brand is that the contractual relationships between Maxeon and SunPower are not clear and Maxeon, as a standalone public company, is losing money. This factor has caused us to downgrade the overall brand "bankability" of SunPower and Maxeon. Their panels are still excellent (although now only marginally better than many other Tier 1 brands) but we don't know what happens if the Maxeon entity goes broke and we’re not sure if the 25 year warranty is being backed by Maxeon or SunPower.

SunPower consumer reviews

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Manufacturer since 1985

solar panels
batteries
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Latest good review thumbs up

John Immel | Lostant, IL | 09/13/2022

John Immel

Everybody and everything was great. My salesman laid everything out, what was to happen, and when it would take place. I will highly recommend Legacy Solar to my friends and the many people who ask me what I think of solar.

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2 comments >
Reply from John Immel: It's terrific to read that you had a great experience with the sales team. Please reach out to us with any questions or concerns in the future. Thank you for helping us change how the world is powered!
Reply from John Immel: John, it is great to read about your satisfaction with the team. Thank you for helping us change the way our world is powered!

Latest bad review thumbs down

Solar4Me | River Ridge, LA | 09/04/2022

Still waiting....

I signed my contract and put a deposit down over 10 months ago and I'm still waiting to have my system installation completed.

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1 comment >
Reply from Solar4Me: Hi, we sincerely apologize for your experience and would like to look into this further. When you have a moment, please email us at customersuccess@sunpowercorp.com with your contact details. We will reach out to provide you with assistance and work towards a resolution. We value your business and thank you for bringing this to our attention.

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Engineer and Solar Enthusiast | Princeton, NJ | 09/12/2022

Very happy, will use again when it’s time to expand the array

We have had a great experience with SunPower solar panels installed by Evoke Solar. Our system was installed in early 2021 and interconnected with the utility (turned on) within three months. From neighbors working with large nation-wide installers, their interconnection took 5-6 months. Evoke was very responsive in every step of the process, from working together to tailor the system design to my needs, to preparing all the paperwork for my HOA, to helping me navigate NJ TRECS, to resolving hardware issues when they came up. I am in e-mail contact with the staff and owners(!) and everything I need is always fully addressed, and I would say I am a needy customer. As an engineer who works in the energy field, I bring a lot of knowledge and that brings a lot of questions and demands, but Evoke was both patient and thorough, and our resulting system is fantastic and performs splendidly. The only hardware issue we had was with the communications box, not the panels or inverters. The box lost its wifi connection, and Evoke replaced it once and we haven’t had any issues since. The SunPower panels are very efficient, cover our roof and our electric needs, and operate worry and hassle free. Overall, I am very pleased with both the panels and with my experience working with Evoke Solar. When my electric demand increases in a few years when I get plug-in electric cars, I may expand my solar array, and if I do it will definitely be with SunPower panels installed by Evoke Solar.

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1 comment >
Reply from SunPower: Here at SunPower, we stand behind our product and customer service. Thank you so much for this glowing recommendation and for helping us change how our world is powered!

CJ | Rocklin, CA | 09/09/2022

Great experience

Sunpower / Hooked On Solar Representatives, especially Ashlee Hahn helped us get our solar needs taken care of with the utmost professionalism and quality of install. The app works great, financing easy, and we are content with our purchase. Ashlee answered questions related to quality, usage , NEM, and longevity to ensure we had the best setup and communicated well through installation.

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1 comment >
Reply from SunPower: We are thrilled that Ashlee provided an outstanding, informative experience. Please get in touch with us in the future with any questions you may have. Thank you for helping us change the way our world is powered!

R & C Residence | Las Vegas, NV | 09/08/2022

Better Solar with Sunpower

Todays Energy Store provided us with a Sunpower X-360 panel System. Marc Hale was more than happy to answer all of our questions during the time while we were shopping for a system and went above and beyond to explain everything that we needed to know to make a decision to purchase our system. Marc worked with us all the way thru from engineering to permiting to installation and system startup. He and his staff were very professional in their approach to providing us with an excellent system. We would highly recommend them to anyone interested in purchasing solar for their home.

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1 comment >
Reply from SunPower: We appreciate you letting us know how Mark and the team did. We're glad to hear that you received great service. Thanks for helping us change how our world is powered.

Adrian zepeda | Beaumont, TX | 09/08/2022

Stellar system

From start to finish sun power and there local Dealer Freedom solar of Austin TX were great! No pressure and they did EXACTLY WHAT THEY SAID THEY WOULD AND WHEN IT WLD BE DONE! We have immediately seen a major reduction in our entergy bill even though we are in August. Freedom Solar has been great as well as Tesla powerwall support. Can't go wrong with Sun Power.

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1 comment >
Reply from SunPower: Adrian, thanks for the review! We love hearing feedback like this. It's always nice to hear how our team is doing.

John L | Poughkeepsie, NY | 09/08/2022

SunPower Solar Panels

We added additional panels to our existing solar panels on two roof systems in August 2022. The entire process from our initial contact with the sales department through the installation was handled in a timely and thoroughly. The permitting and coordination of inspections was scheduled by the capable staff at SunPower. The software allows us to monitor the new system easily.

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1 comment >
Reply from SunPower: Thanks for sharing your solar story with us, John. We're glad that you're enjoying better, cleaner energy.

Steve B. | Bozeman, MT | 09/07/2022

Producing Loads of Power

We installed 24 Sunpower panels on a tracker January 2016. They've worked flawlessly ever since, produce in the neighborhood of 15 Megwatts/year. We completely power our house and are in the process of getting a bi-directional EV to plug into the system. Very happy!

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1 comment >
Reply from SunPower: Thank you for sharing your SunPower experience. We strive to give our customers the best-in-class service and products. Please feel free to contact us if there is anything we can assist with in the future. Our team is always ready to help. Thank you for helping us change the way our world is powered!

IE Resident | Ontario, CA | 09/07/2022

Smooth experience, well within expectations laid

My story of why I went solar: I knew energy prices would continually increase and the summers are getting longer and hotter every year. Energy companies also know this and will most definitely look to take advantage. From what I've seen, energy prices increased every quarter by 5%, but we don't really notice, since the bill can be $50 during Q1, $52.5 in Q2, $55 in Q3, etc, which are very small increases. Additionally, I knew I wanted to get an EV one day so I thought to have the infrastructure first. Knowing that the PV system would pay for itself within 5 years, I thought it was too good of a deal to pass up. As for the Sun Power experience, it was great. Beginning from the phone call with the solar consultant, to the surveyor/installers, and project coordinators, everyone was patient with me and took the time to help me understand each step of the way. Timelines were stated each step and progress always along the lines of what was estimated. Permission to operate took 2 months from signing the proposal, which I thought was a great turnaround time. Sun Power was also a work client of mine in the past, which I learned that they are a strong company who will support their product and not skimp out on small dollar amounts for convenience or 'profit protection'.

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1 comment >
Reply from SunPower: We appreciate you sharing your SunPower experience. It's exciting to have you as part of the SunPower family, and it's such a joy to see your satisfaction with your transition to solar. Please reach out to us if there is anything we can assist you with in the future. Thank you for helping us change the way our world is powered!

Nina Lees | Rancho Mirage, CA | 09/07/2022

Consultant was very efficient, expedient and explained that the best way for us to go was by leasing.The entire team was great. They worked as quickly, efficiently and as quietly as possible. They left no mess of any kind.

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1 comment >
Reply from SunPower: We are thrilled to see your satisfaction with the installation process and that the team provided an outstanding, efficient experience. Please get in touch with us in the future with any questions you may have. Thank you for helping us change the way our world is powered!

Stu | Lawrence, KS | 09/07/2022

Avoiding Escalating Energy Costs & non-renewables.

SunPower panels & controls cut my energy bills to just regulatory minimums. It reduced my dependence on non-renewables to nearly none. It will protect me from energy shocks and outages. I installed two backup Tesla batteries to carry me through nights and potential outages.

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1 comment >
Reply from SunPower: We are delighted to hear of your savings. It is always a pleasure seeing clients happy and confident with their results in choosing SunPower. Thanks for helping us change how our world is powered!

John Valusek | Dickinson, TX | 08/13/2022

Installed professionally and excellent mointoring system . Excellent electicy production.

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1 comment >
Reply from SunPower: Thank you, John. We appreciate you taking the time to share your feedback with us and are so glad to hear that you received great service.

Current SunPower solar panel models

Rated power

355 watts

Efficiency

20.1

Number of cells

108

Cell type

Mono-crystalline Silicon

Rated power

375 watts

Efficiency

21.2

Number of cells

108

Cell type

Mono-crystalline Silicon

Rated power

340 watts

Efficiency

19.2

Number of cells

108

Cell type

Mono-crystalline Silicon

Rated power

350 watts

Efficiency

19.8

Number of cells

108

Cell type

Mono-crystalline Silicon

Rated power

360 watts

Efficiency

20.4

Number of cells

108

Cell type

Mono-crystalline Silicon

Rated power

370 watts

Efficiency

20.9

Number of cells

104

Cell type

104 Monocrystalline Maxeon gen III

Rated power

390 watts

Efficiency

22.1

Number of cells

104

Cell type

104 Monocrystalline Maxeon gen III

Rated power

400 watts

Efficiency

22.6

Number of cells

104

Cell type

104 Monocrystalline Maxeon gen III

Rated power

320 watts

Efficiency

19.9

Number of cells

96

Cell type

Mono-crystalline Silicon

Rated power

327 watts

Efficiency

20.4

Number of cells

96

Cell type

Mono-crystalline Silicon

Current SunPower battery models

Type

Lithium-ion

Usable Energy (kWh)

13.00

Inbuilt Battery Inverter

No

Manufactured

US

Warranty (years)

10

Solar panel and battery specification sheets

 
 
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Solar panel and battery warranty information

 
 
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Local installers that sell SunPower solar panels and batteries

 

Where you can buy SunPower brand solar panels online

Site Model No. Price
N/A SPR-MAX3-355-BLK N/A
N/A SPR-MAX3-375-BLK N/A
N/A SPR-MAX2-340 N/A
N/A SPR-MAX2-350 N/A
N/A SPR-MAX2-360 N/A
N/A SPR-MAX3-370 N/A
N/A SPR-MAX3-390 N/A
N/A SPR-MAX3-400 N/A
N/A SPR-E19-320-E-AC N/A
N/A SPR-E20-327-E-AC N/A

Where you can buy SunPower brand batteries online

Site Model No. Price
N/A SUNPOWER SUNVAULT STORAGE N/A

Contact SunPower


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Head Office
51 Rio Robles, San Jose CA, 95134
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