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Everything you need to know about SunPower solar panels and batteries in 2023

Updated: June 11, 2023

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

Verified profile

Manufacturer since 1985

solar panels
batteries
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Latest good review thumbs up

Nick | Somers, CT | 06/11/2023

SunPower for Home

Recently opted in at getting solar panels and a battery installed with Sun Power. They've been super helpful and are the best choice for us. They've given us the best options and prices compared to other companies like Sun Run. Looking forward to our installation!

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1 comment >
Reply from Nick: Nick, we appreciate the review and delighted to know that you are having an exceptional experience with our teams and product. Thank you for helping us change the way our world is powered!

Latest bad review thumbs down

GW | Tustin, CA | 05/05/2023

Lack of Urgency / Poor Communication

Signed our contract in May 2022 and did not have the system activated until April 2023. A large reason we went with SunPower is that they are vertically integrated and were told that we could have a system activated within a few months. We've only had the system for a month so cannot yet give an opinion on the quality and durability of the system. As for the service, the urgency to complete the project and the communication between the SunPower team members and was lacking. See below: - Numerous emails telling us to wait for another couple weeks. This lasted for months. - Several times, our first project coordinator would not even return our calls. He ended up passing us to another coordinator. - When they were grounding our main service panel, they accidentally broke a gas pipe. The SunPower employee mentioned that the gas pipe might have been leaking/broken before the service. Obviously this was not the case. Also, we were initially told to find our own plumber to fix the issue. In the end, they ended fixing the issue, again, with no urgency and took almost a month to cover the hole in our wall. - Although we have many more items to detail, in summary, we must have spent countless hours and well over a hundred communications (calls/emails/etc.) for this project.

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1 comment >
Reply from GW: GW, we appreciate your feedback and would love the chance to restore your faith in SunPower. Please give us a call at 1-800-SUNPOWER (1-800-786-7693) or email us at customersuccess@sunpowercorp.com and provide your account and contact information so that we may investigate this further on your behalf. We appreciate you bringing this to our attention and look forward to talking to you soon.

All reviews

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SD Justice | Aiken, SC | 05/04/2023

Great system, The Best!!

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1 comment >
Reply from SunPower: We appreciate your feedback! Thank you for helping us change the way our world is powered!

Dave | Lakeside, CA | 04/18/2023

Top Notch with the Best Installers

There equipment is top notch. Where they also stand out is their installers. We used HES Solar here in San Diego. SunPower and HES was an awesome combination

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1 comment >
Reply from SunPower: Dave, we are delighted to read that our equipment has met your expectations and that your installation went smoothly. Thank you for helping us change the way our world is powered!

mit Gowami | JERSEY CITY, NJ | 03/23/2023

Horrible customer service

it's good untill works then they stop , SunPower promise big but rely on third party to even diagnose issue , if you check social media lot of customer solar production is down since 9 month and no one there to help them

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1 comment >
Reply from SunPower: 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.

Yobo | Palm Desert, CA | 03/16/2023

We have had our system about one month. So far no problems.

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1 comment >
Reply from SunPower: Yobo, it is great to read that you had an exceptional experience going solar. We appreciate your review and thank you for helping us change the way our world is powered!

Rebecca Ball | Surprise, AZ | 03/16/2023

EXCELLENT!!!

We are so happy with our solar system with the Sunpower panels. We have had the system for 10 years and have had the very best customer experience we could have. We highly reccommend SunPower systems to everyone! They are efficient, and their customer service is outstanding!

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1 comment >
Reply from SunPower: It is always a pleasure seeing clients happy and confident with their results in choosing SunPower. Thank you for helping us change the way our world is powered!

Rick LaFayette | Burney, CA | 03/15/2023

Stand alone solar panels

The whole process has been easy and very professional. Any questions or concerns, there was always someone to talk to and was never kept waiting for a response. Still working with them to get Tesla Batteries for my panels.

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1 comment >
Reply from SunPower: It is wonderful to read how amicable the installation process has been, Rick. Thank you for helping us change the way our world is powered!

Beverly Solis | Glendora, CA | 03/09/2023

Trouble free Purchase and Installation

This whole experience has been almost flawless. The sales was excellent. We felt we were fully informed and our sales person was not high pressure. We feel we were fully educated about the solar system we were buying and the installation process. Good job Sun Power! Our only problem is that we now have a roof leak and are waiting more than 10 days for the Roofer to come and inspect the roof and the leak. I am sure that the problem of the roofer not responding is because it is the rainy season and they are backed up.

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1 comment >
Reply from SunPower: Beverly, we appreciate your review and are glad to know that you are satisfied with the installation as well as our product. Please email us at customersuccess@sunpowercorp.com or give us a call at 1-800-SunPower (1-800-786-7693) if you are still having issues. We would be happy to assist you. Thank you for helping us change the way our world is powered!

Randy Redmond | Sierra Vista, AZ | 02/23/2023

It took months to get mine repaired

My system, which has a production gaurantee, took nearly 4 months to fix the communication system. Now I have not heard a peep from them about the annual reimbursement for reduced production.,

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1 comment >
Reply from SunPower: Randy, we appreciate you bringing this to our attention and understand your frustration. We have looked into your account and opened a case on your behalf with our Executive Support Team. A case manager will be assigned and follow-up. Thank you for your feedback and we look forward to talking to you soon.

JoAnna Turner | Humble, TX | 02/15/2023

SunPower by Freedom Solar

We went solar with SunPower by Freedom Solar with Sam Cochran as our rep. We love the panels and batteries and Sam still keeps in regular contact with us to make sure we are on the right solar buyback plan to maximize the savings of having the solar.

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1 comment >
Reply from SunPower: JoAnna, it is great to read that you are enjoying your panels and savings. Thank you for helping us change the way our world is powered!

Dcorbin | San Francisco, CA | 01/25/2023

Customer Service after the sale... Lacking

service after the sale... lacking UPDATE: Sunpower responded with a new email address to tell them my issue: customersuccess@sunpowercorp.com due to this review. One day response. I emailed my contact information... the mail did not bounce but the response has been zero after nearly 4 weeks. If I could give 0 stars I would. ******** The 3.6KwHr system I had installed directly by sunpower about 5 years ago. It worked fine, was done on time and was completed in a professional manner. Two months ago, the Sunpower monitor quit reporting data. I did the reset sequence and triple checked the internet connection to no avail. PGE reports my system is still working... just the monitor has quit. I sent an email to Customer Service who responded that response would be slow. I waited. No notice after a month. The sunpower mobile app says to send requests to mysunpower@mysunpower.com.... invalid address... the mail bounced. I have concluded that there is no Customer Service department. The system works, but buyer beware... if your system fails after a few years, you might not be able to talk to anyone about it.

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1 comment >
Reply from SunPower: Hi, we would like to apologize for any inconvenience and look further into this situation. We take your feedback and comments seriously and appreciate you bringing this to our attention. I have reached out to your Executive Support Specialist to alert them of your sentiments and notated the case on your behalf.

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
1414 Harbour Way S, Richmond CA, 94804
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