The Cobalt technicians were amazing. Sarah, Jesus, Omar and Isacc all worked together to help me replace a faulty inverter. I can't thank them enough as they were prompt, organized, communicated well and very efficient. Thanks to the wonderful team! read more

Recently, my 20-year-old solar system faded into non-action. Through my neighborhood list serve (in Crescent Park) I received a referral to Cobalt Power Systems. Following an inspection by Alex Harrison, the lead engineer, I agreed it was time to put in a new system. The old panels were dismantled and by the end of May my new system was in place and up and running. In addition to Alex, who led the project, I met the team of three, led by Mikey, who completed the installation. For anyone either new to solar systems or looking to replace an old one, I highly recommend Cobalt Power Systems for three reasons. (1) Time will tell, but I would say product quality is excellent. (2) Alex provided me with accurate and reasonable cost estimates, so I know what to expect. He also offered payment options. (3) Everyone on the team was a good communicator--ready to answer my questions and accommodate my travel schedules. The funniest thing happened on the first installation date--it rained! The team cheerfully used the time to help me clear out my garage, put the new panels in my garage and organize them so they are ready to use. Everything was completed in less than three months, despite my travel. I highly recommend Cobalt Power Systems to anyone contemplating new or replacement solar panels. read more

I started shopping for solar with Tesla. They were not flexible with custom requests after system design. I chose Cobalt Power Systems instead. I contracted them for a 12.78 kW solar array and two Tesla Powerwalls. Cobalt completed the project on time and exactly per the contract. The installation crew was excellent. I chose Cobalt for their flexibility on panel and Powerwall placement. I also liked the equipment they provided. They used 30 Maxeon Solar Technologies panels. These panels are superior. They carry an industry-leading 40-year product and performance warranty. This warranty is significantly longer than the typical 25-year standard. I paid a premium price for this quality. The system designer made great recommendations on the size of my array and using Powerwalls versus expansion packs. My main issue was communication. It was difficult to reach the Project Manager regarding the installation start date and follow-up questions. Once contact was established, they provided the needed information quickly. I recommend them for their professional designer, installation team, and quality equipment. Be prepared for slow communication from the Project Manager about the start date. Overall, the system was completed professionally and on time. read more

Cobalt Power Systems - Powerwall 3's - Solar Installation Near Me - Mountain View, California

A final update: We are nearing the end of our "solar journey" after a few final hiccups, but I think I can stick a fork in this review. Cobalt managed to install the panels and batteries in a single day (12/13), hitting the critical year-end tax credit deadline. While I was told they were juggling 14 jobs that day, the "all-hands-on-deck" effort was impressive. However, I wasn't told until afterward that it would take another 5-7 weeks for PG&E to replace the meter collar (the "BUS install"). Since this is a prerequisite for PowerWall 3 systems to feed power back into the panel, my system sat in standby mode for over a month waiting for a five-minute PG&E visit. While the utility's timeline is outside Cobalt's control, it did take the wind out of my sails, so to speak. Regarding the pre-install process, the experience shifted once I voiced "strong concerns" via a Yelp review and my sales rep. Following that, I received true white-glove service; dates stopped slipping, and check-ins became frequent. This proved critical when my PowerWall 3 failed and required an RMA just before the PG&E visit. To Cobalt's credit, they handled the replacement swiftly, finishing with literally hours to spare before the PG&E tech arrived. In summary, Cobalt performed as well as could be expected given the 2025 constraints--specifically the inventory shortages and the installation rush triggered by expiring tax credits. The on-site work itself has been top-notch; the workmanship is clean and the field staff were professional. However, internal communication needs an overhaul. I only achieved a reasonable level of responsiveness after capturing the attention of the CEO and COO. Furthermore, there are simply too many points of contact, which requires the customer to guess who handles what. In hindsight, I'd recommend keeping a direct line to your salesperson; working solely through the overworked project managers was often an exercise in frustration, as emails and calls frequently went unanswered. Once you connect with the right people, the service is excellent. After my installation, I was placed in the hands of Alex H., a Field Technician Manager. He acted as the "closing pitcher"--responsive, communicative, and dedicated to seeing the final details through to completion. read more

My experience with Cobalt was very disappointing. My installation experienced significant delays, mistakes and poor communication. The Powerwall was reinstalled twice, and damage to our electrical wiring resulted in a large patch which does not match our existing siding. The company was generally unresponsive to my many emails and voicemails, particularly the Project Manager and System Designer who were supposed to be my primary contacts. The company's internal communication is also poor. Workers were frequently sent to the house with little knowledge of the project and unsure of what needed to be done. read more

Cobalt installed a new system with solar panels, two Tesla power walls, a Tesla Gateway, and two Tesla Wall Connectors (car chargers). It's a wonderful system that generates a lot of surplus electricity to contribute to the grid, while leaving me independent of the grid in case of power outages. The Tesla app provides a great overview of the operation and status of the individual system components. Michael and Jairo did a very good job with the installation, and I was really impressed with their level of workmanship and care they took with everything. read more

Since writing my original review, Cobalt has reengaged with their top leaders, apologized for the shoddy service, and made things right with some additional products and services at no cost. I appreciated them taking the feedback seriously and feel like they've more than made up for the poor service. Thank you for being customer responsive. read more

After my review, the team immediately reached out to try to make things better. They managed to move much more quickly after the review was posted than they did when the job was under contract. Alex should be commended for his willingness to hear our concerns in person and for his attempts to make things right. read more

Provide valuable help in applying for heat pump HVAC rebate and received $1000 rebate as a result. Very professional.

Not well run. I booked a service appointment and got a return email seemingly confirming. Then no show. Called in to find out that the email did not indicate confirmation and I was supposed to get in contact with their new systems designer. I was calling for a service on a system already installed by someone else and was told they aren't seeing service calls until next year. So, essentially no communication with a potential new customer. read more

Paid more for Cobalt because they promised better service. Huge mistake. Their designer did not even inspect the roof properly at first, which led to rework and permit resubmission. Project managers kept changing, communication was chaotic, and I had to chase them constantly. I sent 71 emails between October 2025 and May 9, 2026, just to keep things moving. After installation, they did not even provide a proper walkthrough. The designer offered only a "courtesy" Zoom, then no-showed twice. Overpriced and badly managed. Do not trust the marketing pitch. Stay away. read more

My neighbors just used Cobalt to install solar panels. I have no idea about the quality of the work product, but their crew dumped their van/truck garbage in the gutter three days in a row. I cut them some slack the first time and chalked it up to an accident, but certainly not after the following two days. Terrible read more

Although I LOVE Tesla Powerwall's design and engineering, trying to work with them to add a PW3 to our solar setup (really a necessity under NEM3 with PGE) was as complete and utter a catastrophe as I have ever had with any contractor of any kind anywhere. I wound up with really no choice but to fire them which I did. Then.... Enter Rebecca, system designer from Cobalt Power - she went way out of her way to help solve all the "problems" Tesla's team had created out of thin air. I wanted the system in our garage (Tesla wrongly said disallowed by code) and I wanted the 'whole home backup" using the recently released "meter collar" backup switch designed by Tesla and approved by PGE - Tesla said our panel did not "qualify". Whereas Tesla said both of these were not possible, they would not allow me to communicate with the person (unnamed and far away) who was making these silly decisions. Rebecca came to the house to see everything for herself and then brought their technical lead (Stuart) - together they Madde good things happen! Soon we agreed on a system of 1 PW3 and 1 expansion pack IN GARAGE and with the METER COLLAR. Yesterday it passed final inspection and was placed in service. Alex and Isaac were critical in problem solving to make for a successful inspection. Thank you Cobalt Power, all of those named above and many others. Save yourself the hassle - go FIRST to Cobalt, not LAST as I did. They are not the cheapest out there (significantly more than Tesla would have charged) but this is an area where you absolutely need quality and Cobalt has it. In my mind at least, the choice is clear.... Constructive suggestion: Although 2025 was wildly busy due to the expiration of tax credits, Cobalt really needs to up their game on communication when your project is finally designed and handed to Project Management. We got what we needed but it took a lot of persistence and many calls. This an be improved and I hope Cobalt does so. read more

Cobalt Power Systems - PW3 + expansion pack install - Solar Installation Near Me - Mountain View, California

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Excellent coordination and professional crews. We had a great experience with Cobalt, and highly recommend them. Going solar is a significant investment and a lengthy process, but this team ensured everything went smoothly from start to finish. Key factors that set them apart were their excellent communication, coordination, and quality of work. From the initial design to the final sign-off, every phase was handled with efficiency and craftsmanship. We interacted with four distinct teams, all of whom were professional and easy to work with: The Desiger: Patiently worked through multiple iterations to find the best system for our needs. The Panel Crew: Installed the array quickly and with great attention to detail. The Electrical Crew: Handled the complex wiring with precision. The Inspection Prep Crew: Meticulous in their final checks, ensuring we passed inspections without a hitch. Across the board, every installation crew showed up on time and maintained a clean work area. The quality of the work is top-tier--everything is clean, organized, and built to last and the system is working great. I highly recommend Cobalt. read more

I got a referral from Clean Solar for my commercial project. Although my teeny tiny system wasn't feasible, Jisang explained everything to me that was relateable and easy to understand. Sadly, I wasn't able to give them my business but if my project did go forward, Cobalt power systems would be my first choice. Keep up the great work. read more

The best solar installation company in the Bay Area. Quality and professionalism is top notch. Cobalt being in business for 24 years is a testament to their long standing reputation. read more

Cobalt installed battery storage systems in our house. High quality and knowledgable service provided at a reasonable cost by customer oriented, professional staff. Highly recommended. read more

All of the people at Cobalt were professional, courteous, and did a good job of informing me of what they were going to do and when. I had 26 panels and 3 batteries installed. Once all of the pieces were installed the techs were great at getting back to me in a timely manner when I had questions and resolved my issues. I would definitely recommend Cobalt to anyone wanting to have a solar system installed. read more

In 2022 we had Cobalt Power Systems install a rooftop solar array on our home. We were very pleased with that job, so when we decided to install battery backup in 2025, we went right back to Cobalt to do that job for us too. Due to the problems with the availability of Powerwalls, the time span of the process was longer than we would have liked, but we were told that was going to be a problem going in. Once they were able to obtain the hardware for our job, the installation went smoothly, and everything seems to be working properly. In the end, the project was completed on time, so my hat goes off to Cobalt for their professionalism on both jobs. Having said that, there are couple of things that I think could be improved upon. First, I wish Cobalt had a single point of contact for all aspects of the job, and secondly, I think communication with the customer could be improved upon. That might have been handled better if there was one person who had the responsibility of keeping in touch with the customer on a regular basis, I think perhaps semi-monthly would have been great. Because the Powerwall project dragged on for several months, we were naturally curious at various intervals as to the progress, so I think Cobalt could have done better when it came to keeping us informed of exactly where we were in the overall process. Everything considered, Cobalt did a great job, and I'd recommend them without hesitation to anyone who is considering going solar. read more

Cobalt Power Systems Inc. is a highly PROFESSIONAL, RESPONSIBLE, REASONABLE, CUSTOMER ORIENTED and CARING Solar Power Company with HIGHLY SKILLED installation technicians and PROFESSIONAL staff. These facts became clear to us when at one point the president of the company, Mark Byington himself emailed us additional information and CAD drawings knowing our permit was being delayed by our town's planning commission. He won our trust and admiration that customers are very important to this company. We were convinced that Cobalt Power Systems Inc. was going to be our first choice after our initial phone call speaking with Kurt Newick our system designer. Kurt was very through and knowledgable on this technology at the initial meeting at our house. This meeting prompted us to sign the contract with Cobalt Power Systems Inc. He introduced us to a highly skilled electrician whom we hired for the electrical part of the project. Kurt went beyond the call of duty to support us throughout the entire project, he never missed our frequent phone calls. A high skilled young team installed our solar panels while a highly professional staff processed the administration and fees of our project. The communication lines by frequent phone calls, emails and text messaging were efficient and extremely comforting. Our final closing meeting with Kurt was very rest assuring by him spending several hours at our house going over all aspect of the project and presenting us with a professionally prepared project binder from A-Z including warranties. In the end the cost of this project was matched by the valuable and professional services. I am an interior designer, my spouse an engineer, both with very high standards. Cobalt Power Systems Inc. met our high expectations. We highly recommend Cobalt Power Systems Inc. Thank you Mark, Kurt, our project managers, Giyani and his installation staff, follow up technical staff, accounting and administration staff. With gratitude, Robert & Enssieh read more

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The agent in messages said they can install user bought device. But after meeting they said they cannot. Wasting my time.

We had a wonderful experience working with Cobalt to get our house set up with solar. They were professional, fast and courteous. Highly recommend this company read more

This is a great company. In searching for solar providers, I was drawn to their 5 star reviews vs other similarly rated companies in the area. My initial engagement was centered around Sunrun, as I got seduced by their Costco kiosk. After much research, I quickly learned Sunpower and owning panels was much better... As I was trying to sort through options, I read Cobalt's reviews and stumbled upon some amazing reviews for the legendary Jisang Youn...so I was excited about the company. On my first call, I got lucky and the man, myth, legend picked up. Right off the bat, he was brutally honest about how my house was overshaded by trees and probably not a great solar project....very different than everyone else who tried to sell us on solar! So scored points right away. He mentioned they probably shouldn't waste our time by coming by to estimate, again scoring points. However, after he could tell I really wanted him to come by and once he got a sense of how much electricity we use, he was completely on board. Jisang was very smart, honest, and managed expectations throughout the process...also I could tell he wasn't trying to maximize profits, but trying to find the best cost efficiency in his recommendations. He also could handle my billion questions time and time again, and even took time to reach out after hours when he was super busy. He also was super knowledgeable about NEM 2 and helped us navigate the timelines super effectively. Lastly, this company is awesome because everyone that came through to our house was very customer focused and smart....and even more impressive is their value on diversity as the team was comprised of a diverse group of minorities.... Slightly higher priced than going with Sunpower, but the customer service and hand holding is worth it! read more

Cobalt installed solar panels and a battery backup system for our home and they did an excellent job. We got estimates from several companies, but our decision was based on Jisang, their system designer, and how he spent a lot of time educating us on the pluses and minuses of a solar solution and a clear explanation of the costs and value. Jisang communicated he was the escalation point if there were any questions and issues, and he was always a text or phone call away to handle anything. Our installation lead, Gyani, and his team were also excellent. Gyani is a very good communicator and made sure we were aware of what the status was with the installation. We have gone though several remodels or other home projects and there's always something, this project went very smoothly and the adjustments were easy handled. Cobalt has different teams review and test the system and it makes for a longer implementation duration, but it provides a higher level of confidence. Our solar solution actually got tested real time a few days after we had sign off when PG&E had 3 outages in the week and we didn't even notice it happened except for the phone app alert of the switch to power backup. I highly recommend the Cobalt team and send a special thanks to Jisang and Gyani for how they take care of the customer. read more

Whoa! Yelpies beware. How can I be the only one out of hundreds that Cobalt (their own statement) is asking for payment up front for product and services??? Business red flag - your money, please proceed accordingly. read more

I've hired Cobalt again to install solar and backup batteries on another house. Again, a perfect job and (still) highly recommend!

Cobalt Power Systems supplied and installed 20 solar panels on our roof. They did an excellent job at every stage. The estimator listened carefully to what we wanted, and made suggestions to fine tune this. The installation crew had a couple of days where the heavy rain in early 2023 stopped work. The crew tried to complete as much as possible of the indoor work on those days. They came when they said they would, and got on with the job. Cobalt sent along their own inspector to review the completed job, before the city inspector. Everything went smoothly. Solar installations cost real money (some of which you may get back in a tax rebate). I felt Cobalt Power Systems did an outstanding job, and were well worth the money. Highly recommended. Peter. read more

Professional knowledgeable staff. Responsive customer support. The solar installation project at our house was efficient and smooth with Cobalt's integrated services. read more

I was looking for some solar help on a recently purchased home with solar.I contacted Ryan Lincoln at CobaltPower Systems and advised him I had very little knowledge of solar and needed help if this system was working.He guided me with a step by step procedure on how to identify if the system was working properly. Ryan then sent me a detailed email and followed up with a phone call to insure I was satisfied'. I highly recommend Cobalt Power Systems and we will be using them to expand my current system. Professional customer service. Thank you Ryan read more

Cobalt installed the solar panels and did an excellent job. The entire crew was professional, courteous, and helpful. Special thanks to Nathan, our system designer, and the rest of the crew - Ricardo, Javier, Stuart and others. read more

I would highly recommend Cobalt Power Systems, especially if you can work with Jisang Youn, our system designer. Jisang and his team are fantastic. Many things went wrong during the construction of our new build, but at all times, Jisang and his team went above and beyond to accommodate our needs. Due to project delays and regulatory changes, we were on the cusp of being excluded from PG&E's NEM 2 program. Jisang carefully guided us through communication with PG&E, and we qualified for NEM 2 -- maybe one of the last projects in California to do so. Due to a variety of factors, our system scope changed many times. Jisang was patient, kind, and thorough with all the revisions. As the solar industry is rapidly changing and we experienced delays, Jisang was able to recommend alternative solar panels (making yet another revision), which saved us quite a bit of money. We definitely appreciate the care and attention we received from Cobalt Power Systems and highly recommend them. read more

I just finished a third round of Solar PV installation with Cobalt Power Systems. Every time was impressive. In 2010, I installed a PV system of 40 SunPower panels. That went very well, and the system performed better than predicted. In 2016, I added 44 LG PV panels which brought my power production to cover 100% of my electric bill, which has been zero since 2016. Both installations went extremely well. Based on my past experience with Cobalt, I went with them again this year to install a Tesla Powerwall System of 3 units to help me ride through the predicted PG&E issues in the bay area. I got about 4 different estimates from different companies. Cobalt was the highest bid, but I went with them anyway. I'm glad I did. Why? As an electrical engineer myself, I am continually impressed with their engineering. The other companies, not so much. I heard from one of the other companies that I would have to trench a new main line to power my whole house with a battery storage system at the EXTRA cost of $30,000-$50,000. Wrong! I had a recommendation from a friend of a company that installed his Tesla Powerwall who later rescinded his recommendation, based on a job that had to be redone to get it right. Cobalt's engineering has always produced a proposal that needed no "change orders" or things that were left out. They are true professionals. In 2016 and this year, my sales engineer was Drew Johnson. He gave me a quote which included detailed design specs that made sense. They told me they were backed up and couldn't begin until August. In May, Drew called me and said they had an opening, would we like to start. And they did. And they finished. No surprises. Everything went smoothly. The only delays were from city and PG&E inspectors. Their install team showed up on time every day. They worked hard and got the system in and it is performing flawlessly. They also painted all the equipment to match our house so it is not only functional but cosmetically consistent with our home. I have to also thank Ricardo Mercado who was the project manager of the installation and his team and Tatiana Hamo who made sure that all the compliance papers were filed correctly with PG&E and the city of Saratoga so that everything was compliant and that I would be getting all my tax credits and SGIP rebates from PG&E. If you want to be confident in a good engineering job without surprises from a team of pros, I highly recommend Cobalt Power Systems. read more

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Cobalt installed my solar panels and powerwalls and the experience is very positive that I feel compelled to write a review so that others can benefit as well. Jisang (Jay) is my system designer and Dorian is my lead installer. Jay's honesty, professionalism and knowledge is what draw me to go with Cobalt. Dorian also update me on the next steps and he and his team are very respectful, arrive on time daily and clean up before they leave each day. Ryan arrived promptly for QA check and now we are just waiting on final inspection and P&E connect. They are not the cheapest of the quotes I received but you definitely will be well taken care of and have a peace of mind with their warranty since it's a significant investment. My neighbor used them to install their solar in 2016 and only has nice things to say about them and even went back this year to install powerwall with them. I'll be recommending them to all friends and family who wants to install solar panels and battery in this area. read more

We had Cobalt install our residential solar this October 2023 and it all went very smoothly. The communication, documentation and on-site installation were all excellent; there were a few glitches here and there, as would be expected, but Cobalt handled everything professionally and thoroughly. They were not the cheapest option out there, but we opted for them because they use high-quality panels, are very customer focused and not simply zeroed in on closing the sale. I had contacted them initially over 4 years ago and we took our time making up our mind about solar; we did our research, talked to our friends who used others (including Tesla), got multiple bids, but ultimately only felt comfortable going with Cobalt. We highly recommend them. read more

We had a 10.12 kW solar system installed by Cobalt Power Systems recently. Everything went perfectly - from the initial discussions, to the system planning, communication, installation, and follow up. Jonathan and his team did a phenomenal job and left the job site clean and tidy. It was clear that safety was also a priority for him and his crew. Due to the close spatial locality of the gas meter to the main electrical panel of our home, the electrical work was actually fairly complicated but Cobalt handled it with ease and ensured everything was to code. The city performed an inspection and signed off immediately the first time. The conduit that was installed going from the solar panels to the electrical panel was painted to match our house and was very discreet. I couldn't have asked for a better installation. After PG&E issued permission to operate, we're now producing lots of power and I'm confident we'll be happy with the system for decades to come. Highly recommend Cobalt Power Systems! read more

Cobalt Power Systems - Solar Installation Near Me - Mountain View, California

Cobalt installed solar panels on my home and they did an excellent job. Jisang was the system designer and he was awesome. There were a few hiccups on the way but Jisang always made sure everything was taken care of and on top of it. I highly recommend him. He was professional , knowledgable, very detail oriented and patient with all my questions and just a great guy all around. All the staff at Cobalt was great and they have a good team. I plan to get batteries installed later with them. read more

Full disclosure--we haven't yet done business with Cobalt, but I wanted to give feedback regarding the initial "sales call" we had with them. We dealt with a system designer / sales guy named Jee Song (sorry if the spelling is wrong!) As a recently-retired mechanical / electronic engineer with 40 years experience I can't say enough about how much I appreciated Jee Song's clear communication, candor and willingness and ability to discuss specific system details. We talked about our current electric bill (which it turns out is pretty low already), how much usage would likely change if we added AC or got one type of electric vehicle versus another type, what are the ins and outs of installing battery storage, etc. We have plenty of detailed info for me to punch the numbers for various scenarios. It may well be that we decide that solar is not an appropriate investment for us right now, but after our informative, no pressure, no BS discussion with Jee Song we will definitely go with Cobalt if and when we decide to pull the trigger. read more

Amazing professionalism, all parts are made in America! They did a great job performing the solar installation we requested. All was done at a phenomenal value, with amazing service and responsiveness. Any questions I had were answered immediately, we would like to thank our designer Jisang for everything from start to finish. read more

After talking to a number of potential solar installers, I decided to go with Cobalt based on recommendations from friends. They did a fantastic job, were incredibly responsive to all my questions, communicative about the progress of the project, and worked hard to make sure we were happy with the outcome. The panels have been up for a couple of months now, and so far so good! read more

Cobalt Power Systems - Part of our solar installation - Solar Installation Near Me - Mountain View, California

October 19, 2023 Cobalt Power Systems recently completed an 8.64 KW system with 21 Sunpower panels and two Powerwall-2 batteries. We were especially interested in protection from power outages for AC and essential medical equipment. Kurt Newick, System Designer, answered all of our questions and designed the system according to our needs. He made sure that our project started before the end of NET 2 metering. The installers were professional - knowledgeable, helpful, and friendly. They answered questions, and demonstrated excellent workmanship in the installation. They kept us informed about the progress of the installation, which proceeded smoothly. Inspections and sign off with PGE also went smoothly. Since installation 3 months ago, our home has operated at 100% solar, which we expect will diminish somewhat over the winter. At Wrap UP Kurt made sure that we understood the best operation of the system and alerted us to Tesla's Powerwall rebate. The entire experience was a worry-free pleasure and we would highly recommend Cobalt to friends and neighbors. Robert M read more