Cancel

    Search

    Quantum Solar Designs, Inc

    4.0 (31 reviews)
    Open 8:00 am - 4:00 pm

    Request pricing & availability

    You can now request a quote from this business directly from Yelp

    Services - Quantum Solar Designs, Inc

    Solar system installation

    Quantum Solar Designs, Inc Photos

    You might also consider

    More like Quantum Solar Designs, Inc

    Recommended Reviews - Quantum Solar Designs, Inc

    Your trust is our priority, so businesses can't pay to alter or remove their reviews. Learn more about reviews.
    Yelp app icon
    Browse more easily on the app
    Review Feed Illustration

    Reviews With Photos

    10 Q-Cell PV panels 340W each paired with 10 Enphase 240W IQ7 microinverters.
    Alex G.

    Do not recommend. QSD designed our system against manufacturer recommendations by using significantly undersized microinverters (Enphase IQ7 vs. IQ7Plus). This results in a significantly decreased energy output estimated at 750kWh annually by Enphase in turn resulting in a significantly decreased value of the system. The decreased output is mentioned nowhere in the contract or any other documentation. Nameplate system size in the contract: 3.4kW. Actual peak output due to undersized microinveters: 2.4kW resulting in severe power output clipping and decreased annual production. Refused to do anything about this while producing misleading production estimates after the fact - after installation in May 2020. In addition: did not connect the system to WiFi for reporting. Very slow to respond to requests (phone or email). No estimated production numbers or any other metrics other than the nameplate system size in the contract or any other documentation. Summary: two major failures with a number of smaller ones: (1) did not follow manufacturer recommendations in using radically undersized microinverters; (2) did not disclose any estimated production numbers in the contract or any other documentation. P.S. I was initially ecstatic with QSD given they were highly recommended to us, and the fact that they could actually install a system where several competitors including Tesla, Solar Optimum, LA Solar Group - backed off for various reasons. Yet given the support experience, inexplicable design decisions resulting in very real monetary damage to us, and their multiple attempts to produce misleading production estimates - I can't recommend them.

    Work DONE!
    Kevin P.

    Inspired by the two weird/oddball 1-star reviews, I need to put in my 2-cents. I really don't know what a stink pipe coming out of an old roof has to do with Quantum or solar panels in general, but that does NOT look like Quantum's work. As a real estate broker and avid DYI'er, I followed Quantum into my attic, onto my 2-story roof, and asked a lot of questions. I watched their workmanship and the materials they used. Let's put it simply: The team at Quantum is amazing and they do great work. Questions I had throughout the process were diligently answered -- and I had a lot. The initial meeting with Dwaine senior was beyond informative and I thoroughly enjoyed the presentation. I had two other meetings with companies who seemed to have little knowledge. The installation team is friendly, prompt, and cares about your property. They even made multiple trips to Home Depot to make sure to touchup my conduit lines with the correct matching house paint (stucco is notoriously difficult to match). They also accommodated how I wanted to pay and were transparent with their pricing (cash, loan, etc.). Further, after the installation, I had an issue with the conduit lines blocking access to a certain part of my attic. The team at Quantum immediately took care of this concern free of charge and rearranged the line to accommodate me. Class acts!! Quantum will also sell pigeon netting. I did not choose to opt into this, and, sure enough, had pigeons start living in them. Fortunately, I used my drone to chase them away and annoy the heck out of them every time they tried to land again. They never came back. Thanks Dewaine Sr/Jr, Cathy in the office, Freddie the electrical guy, and Chris the followup man!! You rock! Kevin P.S. If you want more personalized insight on this review, please feel free to call me: (805) 727-3239.

    See all

    4 months ago

    Helpful 2
    Thanks 0
    Love this 0
    Oh no 0

    4 months ago

    Helpful 0
    Thanks 0
    Love this 0
    Oh no 1
    Photo of Bernie T.
    141
    78
    286

    1 year ago

    Helpful 0
    Thanks 0
    Love this 0
    Oh no 1

    7 months ago

    Helpful 0
    Thanks 0
    Love this 0
    Oh no 0

    4 months ago

    Helpful 1
    Thanks 0
    Love this 0
    Oh no 0

    1 year ago

    Helpful 0
    Thanks 0
    Love this 0
    Oh no 0

    1 year ago

    Helpful 0
    Thanks 0
    Love this 0
    Oh no 0

    1 year ago

    Helpful 0
    Thanks 0
    Love this 0
    Oh no 0
    Photo of Alex G.
    111
    12
    4

    6 years ago

    Business owner information

    Photo of Dewaine D.

    Dewaine D.

    Helpful 4
    Thanks 0
    Love this 0
    Oh no 0

    4 years ago

    Helpful 0
    Thanks 0
    Love this 1
    Oh no 0
    Photo of Kevin P.
    324
    53
    181

    9 years ago

    Helpful 2
    Thanks 0
    Love this 0
    Oh no 0

    7 years ago

    Helpful 0
    Thanks 0
    Love this 0
    Oh no 0

    7 years ago

    Helpful 0
    Thanks 0
    Love this 1
    Oh no 0

    5 years ago

    We love our solar. It really helped our electricity bill. They're customer support is very good. We're very happy!

    Helpful 0
    Thanks 0
    Love this 0
    Oh no 0

    10 years ago

    Helpful 8
    Thanks 0
    Love this 0
    Oh no 0

    10 years ago

    Business owner information

    Photo of Dewaine D.

    Dewaine D.

    Helpful 4
    Thanks 0
    Love this 0
    Oh no 0

    11 years ago

    Helpful 0
    Thanks 0
    Love this 1
    Oh no 0

    10 years ago

    Helpful 1
    Thanks 0
    Love this 2
    Oh no 0

    7 years ago

    Helpful 0
    Thanks 0
    Love this 0
    Oh no 0

    9 years ago

    Helpful 0
    Thanks 0
    Love this 1
    Oh no 0

    11 years ago

    Helpful 0
    Thanks 0
    Love this 1
    Oh no 0
    Photo of Max G.
    15
    291
    93

    12 years ago

    Helpful 0
    Thanks 0
    Love this 1
    Oh no 0

    11 years ago

    Helpful 0
    Thanks 0
    Love this 0
    Oh no 0

    11 years ago

    Helpful 1
    Thanks 0
    Love this 0
    Oh no 0

    11 years ago

    Helpful 0
    Thanks 0
    Love this 1
    Oh no 0

    11 years ago

    Helpful 0
    Thanks 0
    Love this 1
    Oh no 0

    12 years ago

    Helpful 0
    Thanks 0
    Love this 0
    Oh no 0

    11 years ago

    Helpful 0
    Thanks 0
    Love this 0
    Oh no 0

    11 years ago

    Helpful 0
    Thanks 0
    Love this 0
    Oh no 0

    11 years ago

    Helpful 0
    Thanks 0
    Love this 0
    Oh no 0

    12 years ago

    Helpful 0
    Thanks 0
    Love this 0
    Oh no 0

    Ask the Community - Quantum Solar Designs, Inc

    Review Highlights - Quantum Solar Designs, Inc

    Brandon once again went over every little detail with my husband and not once made us feel like he was selling us anything.

    Mentioned in 3 reviews

    Read more highlights

    You might also consider

    Verify this business for free

    People searched for Solar Installation 808 times last month within 25 miles of this business.

    Verify this business

    California Solar & Electric

    California Solar & Electric

    4.9
    (112 reviews)

    California Solar and Electric. CS&E is simply the best. Call Mark Howe. Honest, reliable,…read moreprofessional, skilled and highly competitive. Best warranty and quality materials and labor. 949 637-9108. They are out of Santa Clarita. We are so happy and satisfied with our system and our bills have gone from $300 plus a month to less than $40 a month. Also when the power has gone out in our neighborhood the battery backup has saved the day. Stellar value, workmanship, professionalism and service plus a 25 year warranty. Highly recommended

    California Solar and Electric was great to work with. But I wanted to provide a more detailed…read morereview than I normally do as this was a bit more complicated than just going out to dinner. At my old home I had solar installed without any kind of battery backup as at the time battery backup was really not an option. Solar was pretty good but did not provide me with a zero bill. When I sold that home and moved into my new home the cost was more than I wanted to spend. Fast forward three years and prices have come down and with the federal tax credit expiring I decided to make the investment as the cost of electricity seems to keep going up. I wanted to go with Tesla as being a big company I thought they would be a good choice. The first problem I had with them is you can't reach a person to talk to. And for the amount of money this costs I was not really comfortable, however I moved on and paid a deposit and started the process in September of 2025. When I finally was able to speak with a person they told me that they could not guarantee that they could complete the installation by the December 31, 2025 deadline, really 4 months of lead time? I canceled Tesla and looked around at my other options. Shelter came to my home and we spoke. They were knowledgeable and the salesperson was really nice, however their price was a huge difference from the other two quotes that I received. Quantium was another company that I spoke with, and I was ready to use them as they were much bigger than California Solar and I thought that might be a better option, plus a neighbor had used them and were happy with them. However when I got the contract from them it basically stated that they wanted a $1000 deposit and if they found that I needed additional work and if I did not want to continue then I would loose my deposit, that seemed outrageous so I told them that I would not continue with them. Note that after I had decided to go with California Solar and Electric they told me they would give me the deposit back if that would happen, but by them I had already signed the contract with California Solar and Electric and honestly was happier with them at that point. I spoke to Mark Howe and he was excellent. I told him about Quantium and he sent me a copy of their contract and told me that they did not do that. His price was the same and the equipment was the similar. Note that they actually had to upgrade my solar panels and did not charge me any additional fees. They also did some additional work to allow more of my home to be backed up than their original quote. Mark told me that he could get the job done before the tax deadline so I signed with them. The process took a bit of time as we had to get permits and approval from the HOA. But the system was installed on time and fully completed well before the deadline. They actually worked on the installation during huge winds and rain. It did take a day or two longer to complete than what they originally thought. One of my batteries was bad out of the box and that created a bit of an issue but Henry was amazing and took care of everything quickly and professionally. He was even nice when I messed up and scanned a QR code that I thought would download a different app but it basically erased my home from my app. Note to self, double check before scanning QR codes. All in all the process was professional and was handled as quickly as possible. Communication was good even though they were swamped trying to get everyone installed before the end of the year (2025). Everyone that I dealt with was really nice and easy to work with. I think I must have driven Bella their wonderful assistant, crazy calling so often. Of course Henry had to deal with all of my questions which he handled and made me feel very comfortable. I would suggest that if you do decide to go solar, give California Solar and Electric a call and get a quote. Thanks for reading my lengthy review.

    Sespe Power Solutions

    Sespe Power Solutions

    5.0
    (34 reviews)

    I had a solar installation designed, installed, and sold through Sespe Power Solutions. Throughout…read morethe process they were attentive to any issues, and patient while we got some funds together. The quality of installation is excellent, and the service was great. Overall, I couldn't recommend them enough.

    Here is my journey from start to finish--and why I'm extremely happy with the result:…read more Initial Consultation: Ish recommended a design that allowed me to install more solar panels than what other vendors proposed. His approach required a small modification that no other vendor had ever mentioned, and it made a meaningful difference in system capacity. Design Phase: Ish and his team were incredibly flexible in accommodating my specific preferences for how the panels should be grouped and connected to each Tesla Powerwall 3. We held several conference calls with their technician and architect to review and validate the design, and they were consistently willing to collaborate and adjust based on my input. Installation Experience: The installation itself was much quicker than I expected. The longest part of the process was simply waiting for the Tesla Powerwall 3 units which was a Tesla supply delay, not theirs. Rebate Assistance: They also helped me secure a rebate that I wasn't even aware of, which was a great added bonus. Overall: Ish and his crew went above and beyond. I've done extensive research on how to fully maximize the Tesla Powerwall 3, and through my conversations with them, I was able to clearly confirm their technical expertise and confidence in delivering a high-quality installation. I wholeheartedly recommend them.

    Brighten Solar

    Brighten Solar

    5.0
    (38 reviews)

    brighten is the company to pick if you're looking to do solar. they have incredibly high standards…read moreand deliver great quality. I also appreciated that they provided us with an alternative solution to Tesla and worked seamlessly with our roofers

    Brighten Solar is one of the best companies I've ever come across. The folks there are reliable,…read morefriendly, professional, knowledgeable, and communicative. They're truly an outstanding local company, that has the efficiency and experience of a global company. When we were exploring solar earlier this year, we received three bids from different companies, and decided on Brighten given other customers' reviews and experience, competitive pricing, reliable communication, and deep expertise in solar. They did not disappoint. Everything was streamlined and clear. Cash was there with a handshake and a promise at the start, and end. Kyle stepped foot on our property, assessed all needs of our project, and continued communication throughout the entire project. Lea supported throughout in friendly, reliable communication, while capturing seriously pro drone shots of our finished project. Daniel, Quentin, and Spencer were amazing when the time came to put those beautiful panels on our home, making trapeze artists blush with their balance and hard work. Finally, Jeremy, Marine, and Ben were also amazing help throughout the entire process. If you're lucky enough to live in the area Brighten Solar operates, I would highly recommend not wasting your time searching elsewhere - these guys are the best. A truly socially- and environmentally-focused business putting the customer first.

    Quantum Solar Designs, Inc - solarinstallation - Updated June 2026

    Loading...
    Loading...
    Loading...