Overview
Solar Optimum
Panasonic, REC Solar
Tesla, Enphase, Panasonic
Tesla, Enphase, Panasonic
25 Years
25 Years
No
Lease, Loan, Cash
18 Years
SunPower
SunPower
SMA
SunPower
25 Years
25 Years
Yes
N/A
40 Years
Ratings
Solar Optimum
SunPower
Pros & Cons
Solar Optimum
PROS
- Several Flexible Payment Options
- Premium EPC Company
- Certified Battery Installer for Tesla, Enphase, and Panasonic
CONS
- Only Serves Four States
SunPower
PROS
- High-Efficiency Panels
- Solar Monitoring with Panel Level Data
- Industry-Leading Warranties
CONS
- Customer Service Complaints
Reviews
Solar Optimum
Reviews
SunPower
Reviews for Solar Optimum
Helpful Favorable Review
TJ Quigley
April 2nd, 2025
DETAILS
They were a great and transparent company to work with upon installation. I chose them because they weren't a fly by night operation and wanted to have the piece of mind that I was covered POST install. Well one of my microinverters went down. We discussed next steps. Turns out it needed to be replaced and they had it ordered for replacement and installed within a week! Great job Solar Optimum!
Helpful Critical Review
Ted Efthemeou
June 5th, 2024
The system they put up on top of my roof is not putting out enough energy for my needs. The salesman misled me and lied to me about the refund process and they've already had it come out and replace the whole panel and I'm not getting compensated for any payments that I have paid
Reviews for SunPower
Helpful Favorable Review
Ethan Furman
January 31st, 2024
Pasadena, CA
DETAILS
I had a great experience with SunPower. Very high quality panels, excellent warranty, and great savings compared to what I’m paying for with the utility. Given SunPower has been in business for decades, I feel very comfortable using their products.
Helpful Critical Review
Cat Huss
September 27th, 2024
DETAILS
They never told us that when we need power such as after hurricane it’s automatically turned off. SUNPOWER doesn’t work without the Internet. save your money buy a whole house Generac. at least then when you need power, you have it. all we have now is an $81,000 bill
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.
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