SunPower vs. Sunrun: Which should you choose? 

SunPower vs. Sunrun —two giants at the forefront of the U.S. solar industry.

Both are known for their quality solar panels, battery systems, and other solar-related offerings. But who are they? Which company has superior products? And above all, which of these solar providers is right for you?

This article will help familiarize you with each of the above companies by answering these questions and more.

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SunPower Vs. Sunrun: Breakdown

Specifications SunPower Sunrun
Solar Panel Manufacturer Maxeon Solar Technologies Third-Party Suppliers
Efficiency Range 345W @ 21.2%

440W @ 22.8%
Average Price Per Watt Approximately $3.92 N/A
Solar Product Warranty 25 years
40 years (Maxeon panels)
Warranty of Other Components Inverter (25 years)
Mount (25 years)
Monitoring System (10 years)
Energy Storage (10 years)
(1 The term ‘Rated Power’ is the ideal solar panel output in desirable conditions. It is expressed in watts.)

SunPower vs. SunRun: SunPower overview

SunPower logo

SunPower was first established in 1985 by Richard Swanson, an electrical engineering professor from Stanford, and has been headquartered in Silicon Valley ever since.

The company provides green-tech energy solutions to consumers by selling, installing, and financing solar power products such as panels, batteries, monitoring software, and mounting hardware.

A point of pride for this solar giant is the fact that they’re the only U.S.-based company that’s been around longer than its 25-year warranty.


In August 2020, SunPower Corporation made the decision to split into two separate public companies:

  • SunPower: Responsible for supplying all solar-related services to customers.
  • Maxeon Solar: Responsible for producing SunPower’s high-efficiency solar panels.
SunPower company split.
Source: SunPower

Maxeon Solar is based in Singapore, with factories in France, Malaysia, Mexico, and the Philippines. The company strategically chose these locations to help them take advantage of low-cost manufacturing processes throughout Asia.

Now don’t let the idea of “low-cost manufacturing” put you off. While the split and location change has decreased manufacturing costs, the quality remains unchanged.

Since the split, Maxeon has provided SunPower with quality products such as the Maxeon 6 AC Solar Panel, which boasts an efficiency rating of 22.8%.

SunPower vs. SunRun — Maxeon panel efficiency.
Source: SunPower Separation/Investment Announcement

In short, the strategic decision to divide the company into two parts has paid off for both the company and its consumers.

Are you struggling to size your solar system? Our in-house experts have created a solar calculator to help make things easier for you!

SunPower vs. Sunrun: Sunrun overview

SunRun logo.

Sunrun was first established in 2007 by founders Lynn Jurich, Nat Kreamer, and Ed Fenster.

The company engages in the design, development, installation, sale, ownership, and maintenance of residential solar energy systems throughout the U.S.

Sunrun offers these solar services both directly to its customers and through its partners, including installation, sales, and strategic partners (retail partners included).

Solar service pioneers

A significant difference between Sunrun and other solar companies (SunPower included) is its solar service model. Right from its inception, Sunrun pioneered this model to create a low-cost solution for customers seeking to lower their energy bills.

So, what is this solar service model?

The core service offering comes in the form of Sunrun’s lease and power purchase agreements — the company refers to these agreements as “Customer Agreements.”

How It Works

While SunRun allows customers such as yourself to purchase one of its solar systems, 80% to 90% of its business comes from “solar as a service.”

Essentially, you’ll enter into an agreement with Sunrun, which allows the company to lease out and install a solar system on your home — typically over a 20 to 25-year period.

Sunrun provides daily system monitoring, free maintenance, repairs, and comprehensive insurance throughout this period. In exchange, it receives a steady cash flow from a high-quality customer with good credit. Ultimately, this allows the company to qualify for tax (and other) benefits.

If you’re interested in Sunrun’s leasing options, click here.

What’s in it for the homeowner?

By entering into a lease agreement with Sunrun, you can acquire a solar system for little to no money upfront. Instead, you pay a monthly fee. You save money when this fee is less than the local utility’s electricity rates.

But remember, Sunrun still sells solar systems. As such, you can choose from several flexible solar financing options or pay outright.

Moreover, you can purchase a leased solar system after the contract period is up.

SunPower vs. Sunrun: Which company produces better quality?

As a prospective solar panel owner, it’s only natural for you to gravitate toward a company with superior solar panels. Let’s take a closer look at what each company has to offer.

Which company has superior solar panels?


Right off the bat, SunPower has the advantage. You know who produces its solar panels (Maxeon) and where they are manufactured.

Here are some examples of what SunPower has to offer:

Specifications SPR-P6-395-BLK SPR-P6-400-BLK SPR-MAX3-410-BLK
Wattage 395W 400W 410W
Efficiency 20.1% 22.6% 21.6%
Product and Power Warranty 25 years 40 years 40 years
Guaranteed Output % At 25-Year Mark 86% 92% 92%

Quality-wise, SunPower stands confidently behind its products. The company offers a comprehensive 25-year warranty covering its Performance Series offerings. Additionally, it offers an industry-leading 40-year warranty on its Maxeon panels.


Sunrun does not manufacture its own products. While the company did have a partnership with LG, the South Korean tech giant has since decided to stop manufacturing solar products. Instead, the company uses multiple equipment suppliers.

Here’s the issue — you won’t know which panels you’ll be provided with until you enter into the purchasing process. With this in mind, it’s difficult for us to provide you with a concrete answer as to the overall quality of its panels.

Finally, because Sunrun doesn’t manufacture its solar panels, those who purchase its solar arrays must rely on manufacturer warranties. However, the company provides a 10-year workmanship warranty against damage to your roof or installation problems.

Which company has superior energy storage?


SunPower offers its SunVault storage. This energy storage solution (ESS) is a seamless backup power option during power outages. However, it’s also suitable for general use.

You can easily integrate these units into existing SunPower solar systems. On the downside, SunVault systems are incompatible with third-party solar equipment.


Sunrun does not manufacture its own ESS solution. Instead, it offers the Tesla Powerwall.

The Tesla Powerwall is a home battery system that stores energy generated from solar panels or the grid. Moreover, it can provide backup power during power outages.

The Powerwall is designed to be simple and easy to install, whether on the ground or wall-mounted. What’s more, it’s scalable, so you can install multiple units together to increase your total storage capacity.

But here’s the best part — you can integrate it into an existing solar system or use it as a standalone backup power source.

Now let’s take a look at these companies’ respective energy storage options:

Specifications Powerwall+ SunVault
Usable capacity 13.5 kWh 13 to 26 kWh
Continuous power rating 5.0 kW 6.8 kW
Depth of Discharge (DoD) 100% 100%
Round-trip efficiency 90% 85%
Warranty 10 years (unlimited cycles) 10 years (unlimited cycles)
End of warranty capacity 70% 70%
Sources: Tesla Powerwall 2 Datasheet – North America/ SunVault Specs

What’s the verdict?

Solar panel-wise, SunPower takes the cake. The company’s comprehensive 25 and 40-year warranties and the fact that its panels are known entities make it an absolute no-brainer.

Looking at energy storage, the winner is not so clear. Sunrun offers the Tesla Powerwall, which edges out SunPower’s SunVault in terms of round-trip efficiency, although its continuous power rating is not as high.

However, the SunVault is not compatible with third-party solar systems. Therefore, we give the advantage to Sunrun.

In need of some solar blueprints? Click here.

SunPower Vs. Sunrun: Which company is cheaper?

Price of residential solar in the U.S.

To get a better sense of where each company stands price-wise, it’s important to know the price of residential solar.

A graph illustrating the median gross price of residential solar in H1, 2022.
Source: 2022 NREL white paper

As per the above graph from the NREL’s latest solar industry update, the median gross price of residential solar in H1 2022 is $2.77 per watt.


According to the NREL, SunPower’s residential solar panels cost around $3.92 per watt. Taking this figure into consideration, a 5kW solar panel system in the United States will cost you around:

$3.92 per watt x 5,000 = $19,600

As of Q2, 2022, SunPower residential solar systems cost approximately $3.90.
Source: 2022 NREL white paper
As of Q2, 2022, SunPower residential solar systems cost approximately $3.92.
Source: 2022 NREL white paper


Sunrun’s solar panels tend to come in at a more expensive $5.39 per watt. Therefore, a 5kW solar panel system in the United States will cost you around:

$5.39 per watt x 5,000 = $26,950

Note to our readers: the above values do not consider system efficiency. While we’d like to account for efficiency to give you more accurate estimates, it simply isn’t possible due to Sunrun sourcing its products from multiple third-party suppliers.

What’s the verdict?

Both SunPower’s ($3.92) and Sunrun’s ($5.39) costs per watt are well over the $2.77 average.

But again, it’s clear that the second round of the SunPower vs. Sunrun duel goes to SunPower, with the former having a significantly cheaper cost-per-watt average.

Which Company is Right For You?

This part of the SunPower vs. Sunrun debate comes down to your needs.

If you want to purchase a solar system outright, then SunPower is the go-to option. There’s a reason the company has become a juggernaut in the solar industry — its service and products are well renowned and of high quality.

However, if you don’t want to commit to purchasing a system and would prefer to lease one, Sunrun is a solid bet.

Yes, we know that SunPower leases out their systems too, but Sunrun has been at the forefront of solar leasing agreements for a long time. After all, they did pioneer the model.


Reviews exist for a reason. Sure, inherent bias does play a role, but it’d be silly to ignore the value of reviews entirely.

With the above in mind, here are some links to each company’s reviews on Consumer Affairs and Best Company.




Related Reading: SunPower vs. Tesla (Which brand should you choose?)


How do SunPower and Sunrun approach customer service and support?

While the article doesn’t specifically mention the customer service details of SunPower and Sunrun, generally, reputable solar companies prioritize customer support, offering various channels like phone, email, and chat support to assist with inquiries, issues, or concerns.

Potential customers are advised to read reviews and perhaps contact each company directly to gauge the level of customer service provided.

Can I integrate Sunrun solar systems with third-party energy storage solutions?

The article does not specify, but typically, solar companies like Sunrun might allow integration with various third-party energy storage solutions, given that compatibility and technical specifications are met.

It would be best to contact Sunrun directly for precise information on integrations.

How environmentally friendly are the manufacturing processes of SunPower and Sunrun?

The article does not provide specific details on the environmental impact of the manufacturing processes of SunPower and Sunrun.

For accurate and detailed information on the sustainability and environmental practices of both companies, it would be best to refer to official reports or reach out to the companies directly.

How do the installation processes of SunPower and Sunrun compare?

Specifics on the installation processes of SunPower and Sunrun are not covered in the article. Typically, the installation process involves an initial assessment, system design, permitting, installation, and final inspections.

Prospective customers should contact each company directly to understand their respective installation processes, timelines, and any additional services offered.

What financing options are available for SunPower solar systems besides purchasing outright?

The article primarily discusses purchasing options but does not delve into specific details regarding SunPower’s other financing options.

Generally, solar providers offer various financing solutions including leases, loans, and Power Purchase Agreements (PPAs). For detailed and customized financing options, it is recommended to consult with SunPower directly.

Are there any performance guarantees provided by Sunrun given the variability in solar panel manufacturers?

The article does not provide specific details about performance guarantees by Sunrun. Usually, companies offer performance guarantees to ensure that the solar systems operate at a certain efficiency level.

Potential customers should inquire directly with Sunrun to obtain precise information regarding performance guarantees, especially considering the variability in solar panel manufacturers.

Final thoughts

By now, we’re confident that you have a much better idea of each company and what they entail. But remember, additional research can only benefit you. So before you commit to anything, be sure to investigate as much as possible.

In closing, we hope you’ve found this resource to be of use. Should you have any further questions or insights into this (or any other topic), we encourage you to follow us on Twitter or reach out to us in the comments section below.

Robert Wortrich
Robert Wortrich

Robert is a content creator and editor. His passion for researching and the environment led him to joining the Climatebiz team. When he isn’t busy writing articles or learning more about everything Green Technology-related, you’ll find him spending time with friends or hiking one of the many wonderful trails that his home – Cape Town – has to offer.