Do not buy a SunPower solar system for your home energy. Ever. I purchased a home to be built in a new California 55+ development while I lived in another state. This subdivision developer told me that I had to have solar, and it had to be from SunPower. I was uncomfortable with this but knew I had to comply. I never saw the house that I ordered until it came time to move in.
After several months, I noticed that my system was the only one in my development whose solar panels were on a north facing slope of my house despite having ample south facing slope which would have been preferable, so I decided to investigate. I called SunPower's customer care and was given polite but non-technical responses and was given assurances that they would supply information on my house's system design that may have caused this odd placement of my system. I never heard from them again. I then contacted my subdivision's warranty department and SunPower cooperated with them and supplied their system design diagram to them (i had previously requested SunPower to supply me with this same document, and nothing ever happened.) It turned out that the aerial view of my house had a N-S-E-W symbol on it that was 180 degrees off, so the solar installers followed SunPower's diagram and obeyed the unnatural orientation; result, a north facing solar system!
This resulted in more phone calls to Spwr's customer care which resulted in the manager of that department calling me and verbally offering an amount of compensation money equal to about two of their panels. This manager and customer care dept I found out are based in the Philippines. I told this guy that that was a lowball offer and that I wanted my system to be fixed, physically. He said he'd take it back for review. This guy is a fast talking used car salesman type who I have come to believe does not know much about solar at all but he's "faking it until he makes it" type of job performance.
Next, I found a home in my subdivision which has an identical SunPower system to my own, only this owner has his system where it should be; i.e on his house's southern slope. We compared system statistics. My system underperforms his by generating 40% less solar power per year! This discovery caused more calls by me to SunPower, which resulted in them escalating my complaint to another person, this time in Texas. After a week or two, SunPower
officially closed my complaint with no action. All I was requesting was that they move my system to my south slope at their expense so that I could stay at NEM 2.0. I pay about an extra $500/yr in electricity due to SunPpwer underperformance, and due to their lack of honesty this will happen for as long as this house stands unless something is changed. You can read about this case in more detail by going to the Better Business Bureau archive BBB complaint ID 21933514. SunPower company is financially 'on the ropes' which may explain their blatant lack of care to fix their mistakes. Avoid them like the plague. read more