Solar Optimum vs SunPower

Jordan Grimmer
Jordan Grimmer | Senior Editor

Solar Optimum and SunPower have a lot in common. They both serve California and Nevada residents — and they are both in the top-five ranked companies in those states according to our Best Rank algorithm

Most notably, both companies are well-reviewed with over 500 user reviews on our site, most of them positive. This indicates an overall satisfied customer base for both Solar Optimum and SunPower. 

However, the companies vary in their equipment manufacturers, leasing options, and specific review distinctions. We'll walk you through the data we have and an explanation of the differences below. 

Solar Optimum logo
#34 Solar Optimum
6.9 Overall Score
4.9
star star star star star
(532)
SunPower logo
#1 SunPower
9.8 Overall Score
4.5
star star star star star_half
(3,627)

Overview

Solar Optimum

Panels from

Panasonic, REC Solar

Inverters from

Enphase

Batteries from

Tesla, Enphase

Workmanship Warranty

25 Years

Equipment Warranty

25 Years

NABCEP Certified

N/A

Purchasing Options Offered

Loan, Cash

Time in Business

15 Years

SunPower

SunPower

SMA

SunPower

25 Years

25 Years

Yes

N/A

37 Years

Ratings

Solar Optimum

Overall Score
6.9 of 10
Review Score
4.9
star star star star star
Value for Money
4.8
star star star star star
Quality of Product or Service
4.9
star star star star star
Company Trustworthiness
4.8
star star star star star
Likely to Recommend
9.6 of 10

SunPower

9.8 of 10
4.5
star star star star star_half
4.4
star star star star star_half
4.4
star star star star star_half
4.5
star star star star star_half
8.8 of 10

Pros & Cons

Solar Optimum

PROS

  • Several Flexible Payment Options
  • Premium EPC Company
  • Certified Battery Installer for Tesla and Enphase

CONS

  • No Lease or PPA

SunPower

PROS

  • High-Efficiency Panels
  • Solar Monitoring with Panel Level Data
  • Industry-Leading Warranties

CONS

  • Customer Service Complaints

Reviews

Solar Optimum

Number of Reviews
532
Review Breakdown
4.9
star star star star star
1 star
1%
2 star
1%
3 star
1%
4 star
7%
5 star
89%

SunPower

3,627
4.5
star star star star star_half
1 star
8%
2 star
2%
3 star
3%
4 star
11%
5 star
77%

Reviews for Solar Optimum

Helpful Favorable Review

star star star star star

Hong Tran

August 10th, 2022

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Verified Customer

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Review Source

We’re very please with Solar Optimum. They offer competitive pricing and great customer services. We’re kept informed throughout the permit and installation process. They worked efficiently and completed the job within a few weeks. We’re very pleased with both the result and the entire experience. We will be very happy to recommend to our friends and family. Thank you Solar Optimum for a great job with our solar panels installation!

Helpful Critical Review

star star star_border star_border star_border

Stiver

October 5th, 2021

DETAILS

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Verified Customer

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Review Source

Poor communication, Solar Optimum could NOT retain a project manager for my install, first attempt to install trashed my new roof, install had to be redone with roof repair, install crew spoke little to no English leading to confusion and errors at install DESPITE supposedly having plans drawn up and provided for the installation. Quality of product/service only made "Fair" rating because I opted for the highest quality equipment from outside providers.

Reviews for SunPower

Helpful Favorable Review

star star star star star

Rosita Cantillep

December 1st, 2022

DETAILS

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Verified Customer

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Review Source

I think installation was slow but once it was up and running it has been headache free. I save a lot in my electric bill but at the same time I had spent a lot of money already. I just don't want to be burdened with monthly electric bill. I believe it is a good investment and have no regrets; just relaxed.

Helpful Critical Review

star star star_border star_border star_border

capealan

December 4th, 2022

DETAILS

Once the site study was complete, everything moved at a snail's pace. Expectation was to be producing solar power 2 - 5 months after signing contract. Signed proposal in May, it's now the beginning of December and still no power. Installation was completed in August and all they had to do was schedule an inspection with the Electrical Inspector; They haven't even called the town yet. The coordinator seems to be doing his job but no one is listening to him. Trying to contact someone who is really in charge seems impossible. Customer service is terrible.

The Final Word

You can't go wrong with either of these options. But there are a few distinctions between Solar Optimum and SunPower that may make a difference to you as you compare companies. 

Roofing 

If you live in Nevada or California, you can work with either of these companies, but you'll want to consider what sets Solar Optimum apart: roofing services. Where a roof's material, age, and condition can be crucial factors in a solar installation, hiring a roofing professional can give you peace of mind and present opportunities for a roofing purchase in tandem with solar. 

Option to lease

While we generally recommend purchasing solar to get the financial benefits of ownership (alongside the federal tax credit, where applicable), some consumers aren't in a position to pay for solar upfront or take out a loan. There are leasing and power purchase agreement (PPA) options for these situations. Solar Optimum does not offer leasing and PPAs, but SunPower does. 

Equipment 

Both companies provide highly reviewed equipment options but consider the different brands in case you have a preference.

SunPower provides the highest-efficiency solar panels available, reaching up to 22.8 percent efficiency and carrying a temperature coefficient of -0.26, meaning there is a minimal impact per degree of temperature change. SunPower offers its own SunVault Storage system including the SunVault Battery and Hub+. 

Solar Optimum is an Enphase Platinum installer and a Tesla-certified battery installer. 

Reviews 

While both companies have an impressively high overall star rating, Solar Optimum has a slight edge over SunPower within our sentiment criteria, as you can see in our rating chart above. Where SunPower has an average of 4.5 out of 5 stars within the criteria of value, quality, service, and trustworthiness, Solar Optimum has an average of 5 out of 5 stars. 

The bottom line

It's too close for us to make a call between these two companies. They are neck-and-neck in regard to customer satisfaction, quality of materials and service, and the warranties they offer. We recommend obtaining quotes from both companies so you can see how a system (and loan, if applicable) from each of these companies compares. 

Note that if you live outside of Nevada or California, Solar Optimum can't help you, so see if SunPower is available in your state. 

Top Choice

SunPower Logo
SunPower

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