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    KOTA Energy Group

    3.5 (107 reviews)
    Closed 8:00 am - 8:00 pm

    Services - KOTA Energy Group

    Solar system maintenance

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    Chloe A.

    This was the worst solar experience imaginable. These people destroyed a wall and halted our renovation, we told them so many times, they didn't care, I had to hire someone after waiting 2 weeks for them just so we could continue. They damaged the electrical to the house, they tracked dog poop all over my house, they damaged exterior walls and never fixed them, they left us without power for a full day and no heat int he dead of winter, they left a generator in our yard for a month despite pleas to come get it, they installed 4 months late, They lied repeatedly about nearly every aspect of the install, they left giant holes in my walls for 6 months now. They are unethical. They do terrible work. The customer service is catastrophic. They left our house damaged, we have paid over $10,000 in repairs. We demanded they pay for this and only covered $5,000 which took them 6 months to pay. We confronted our manager Nate and his boss John Hard. They lied to our faces about nearly everything. I can get into detail if you want to know. They are also silenced anyone below them who tried to help us. I regret choosing Kota more than I can articulate. I have heard other tales of horror. Roofs being destroyed, rain damage from incompetent installs, damage inside the home. They do not care once they have our money. Some of the worst people to work with, pls avoid at all costs. I only wish we could cancel our contract.

    My house with 8 panels installed by KOTA.
    Paul W.

    My experience with KOTA was easy. Matan Bostick was engaging and informative from the very first minute. He took the time to understand what my needs were and what I was hoping for with the program. I wasn't sure about the number of panels because I was looking to lease an EV. Matan was patience as I went back and forth, and helped me come to a conclusion without trying to upsell with the higher panel count. Matan's focus was solely on me. His only goal was to make sure I had all the answers I needed without any pressure. I knew this would follow suite with KOTA, and it has. I have a handful of neighbors who already used KOTA for their solar needs, and I'm glad I did, too. I felt very comfortable, supported, and confident that my experience with Matan would lead to an equally satisfy experience with pre-inspections, permits and the actual installation this past week. I'd recommend KOTA for your solar needs, and Matan as your sales rep. He is what made KOTA jump to the top over other solar providers that I talked with recently.

    Bad panel. Can you tell?
    Russell M.

    KOTA still will not replace defective panels. Now there are two panels going bad and this company is the worst as they do not stand by there products. Shame on them.

    James M.

    I am actively trying to recoup losses from KOTA. The crew that put in my solar panels, caused 17,000+ dollars in damage to my property and counting. They broke many roof tiles, and there are large gaps in most all of the stanchions for the panels frame. One was literally 45 degrees in the air. This means that every rain since the install, damaged my underlayment, plywood, insulation, living room ceiling and walls drywall, and paint (yes I had to put out buckets). I have had two solar certified roofing companies inspect their work, and both have given bids that 15,000 dollars of work needs to be performed to completely reinstall the panels, and replace the underlayment because they were not installed correctly / professionally. This cost is likely to rise once the tiles come off and the plywood and insulation are inspected. I have estimates that the interior damage is 2,000 dollars currently. I have contacted the company for 2 months well over a dozen times, spending countless time on hold, and nothing. I was told by their project managers they fired every install crew they had except one for incompetence, and then the entire Bay Area office was fired. I reached out directly to their CEO and Director who promised to fix my roof "with all urgency" but nothing happened except more damage every time it rains for weeks. Moreover, these are just the current issues. My system failed inspection multiple times. The crew failed to show up multiple times during the install. I called them and told them the were planning to install incompatible microinvertors in the plans, and they completely ignored me, delaying the installation for months when they showed up with the ones (I told them) wouldn't work. The company failed to install the panels where we agreed. Their crew installed the cut-off switch in the middle of my wood storage and lied they could not move it. My entire system stopped working last year, and after four months, I had 3,000+ in charges to pay for before they replaced every microinvertor (after trying to claim it was an "act of god" not their absolutely amateur installation). The only good thing about this company is the salesman. KOTA is a dumpster fire, point blank, full stop. If you had an installation done by them in the Bay Area, PLEASE have it inspected (a roofer / solar company will likely do this for free). Your roof is likely being damaged every time it rains. The longer you wait, the more damage there will be. There is no question this is KOTAs fault. I had zero leaks, and my entire roof inspected, and all aging materials replaced a year prior to KOTAs installation. Please see the pictures attached, it is simple to see their shoddy / poor workmanship, and the issues it caused.

    Seth C.

    We had a great experience with Rae from Kota. He was recommended by a friend and did what we wanted: gave us clear information, answered our questions clearly, honestly, and without pressure, and let us move the project forward at our own pace. In the end we wound up financing the entire thing including a new roof (through the company the Rae recommended). The entire process took a bit of time given that we first had to get the roofing done and then schedule the installation, but Kota was pretty quick to do their part of things. The slowest part was waiting for the city inspections and for PG&E. Kota wasn't the cheapest quote we got, but it seemed like they had a good process and I felt best about moving forward with Rae compared to the several other salespeople with whom I spoke. I will admit that people from Kota still knock on my door now and ask me why I don't have solar, but I imagine that they'll update that system and stop fairly soon? 5 stars for Rae in particular; Kota in general was fine but I can't really compare the install or other parts of the process with other companies. In the end our system is cranking out the predicted amount of electrical and we have negative usage so feeling pretty good about that, and will feel even better when the tax credit kicks in!

    The installation of the battery for the solar panels.

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    7 months ago

    They closed and bankrupted and didn't let their customers know . Leaving solar customers out and dry

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    Page 1 of 3

    Ask the Community - KOTA Energy Group

    Review Highlights - KOTA Energy Group

    I worked with Pablo Avila on a solar panel installation, and he was extremely, courteous, responsive, and helpful.

    Mentioned in 19 reviews

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    East Bay Power Systems - Beautiful install against the back drop another gorgeous sunset over looking the bay!

    East Bay Power Systems

    (98 reviews)

    Having East Bay Power Systems design install and certify a rooftop solar panel system has been a…read morewonderful experience. Working with the team (Darlene, Jeff, David etc.) to get the system designed and installed was very easy, they took care of everything, including getting the city to approve the design/installation for PG&E. Installation was a simple one day process, and best of all, we were essentially off the grid the next day. Interestingly East Bay Power Systems use American made solar panels (Aptos) and an American made power backup system (Tesla). Not only does the system perform flawlessly, because of there high output of the Aptos solar panels (up to 450W per panel) the whole array of 10 panels is virtually unseen. As an added bonus, they set up a Tesla app on your phone so you can see at a glance how mush power the system is generating, how much is being used to power the house, how much is used to charge the backup system and how much power is being sold to PG&E. For a system this good, overall cost was relatively low, far less than what I was quoted 5 years ago by two different companies. You may have noticed all my reviews to date on Yelp have been 5 star, this is deliberate. Life is too short to focus on that which does not make us happy. This is why I restrict my reviews to those things/places/services that make me happy and appreciate life. Sure, I have been to some really dreadful shops, hotels and restaurants etc., but, like I said, life is too short to spend time thinking and writing about them.

    The product is good, the process left us wanting…read more Eric, David, Jose and the crew did an excellent job. My frustration was with the post installation process. I got answers from Darlene that did not make sense. Sometimes her computer was down other times her phone was down. Sometimes she would call to give me a message only to realize that she had called the wrong customer. Did not enjoy working with her. Finally, Kara engaged and we got the Permission to Operate about two months after the install. Supposedly Jeff (the Business Owner) is no longer with the company and has gone back East, so not sure who is leading their future efforts. For future customers: hang on to a portion of the payment till the Permission to Operate is received not just the installation.

    Green Air Heating and Air Conditioning - Solar Panel Install in San Ramon, CA.

    Green Air Heating and Air Conditioning

    (92 reviews)

    This is the worst company I have encountered when hiring contractors and paying for membership…read moreplans through the years. Green Air actually took over Certified Heating's clientele (I was with Certified for 2 years) and they were wonderful. After they took over, they already cut down our maintenance visits from 2x a year to 1x a year. I wasn't too happy about it but the techs that came were nice and cordial. However, I'm not really sure what's going on. Maybe new management. I had my last maintenance service done in 6/2025. I moved in Dec 2025 and transferred my service to the new address. I scheduled a maintenance service for end of this month and just last Thursday, I got an update email that they were downgrading and removing all HVAC tune ups, air filter changes and solar cleaning. Basically all the benefits that I chose to pay the membership. What really angers and frustrates me is how no one is picking up their phones and it goes straight to vmail. When I did finally get an email reply, they stated that they would only apply my 5 month payments to the maintenance fees, so they basically didn't count the previous months I paid at my old home. I feel like that is pretty unfair, that I paid a full year to have no maintenance included and I would have to pay more money on top to match whatever fee they say maintenance services are currently. They didn't offer a refund or that my service I already scheduled back in May would be taken care of. Now I just want to cancel and take it as a loss since I can't get a clear answer. I will have to find a new company that hopefully cares about their customers.

    I've been a loyal customer here for over four years, but after my experience today, I am completely…read moredone. For the last 14 months, I've been paying my monthly fees faithfully, yet I haven't received a single service visit. No maintenance, no proactive calls, nothing. Their billing system is a disaster and their communication is nonexistent. The breaking point was a call I received today. They told me they updated their billing system and needed to collect payment again. When I pointed out that I've been paying for over a year without a single person showing up to do the work, and that they have zero records of calling me to schedule.. they flat out refused to admit it. I asked to speak to an owner or a manager to resolve the refund for the service I never got. Instead, a man got on the phone, spent the whole time talking over me, and then actually HUNG UP up on me. Now, every time I call back to finish the conversation, it goes straight to voicemail. It is honestly ridiculous that a customer has to chase a company down to get them to do the job they are already being paid for. To be treated with such disrespect after four years is a slap in the face. Save yourself the headache and go with a company that actually values its customers and answers the phone.

    Sunlight Electri-Cal Solutions - Franklin certified

    Sunlight Electri-Cal Solutions

    (83 reviews)

    I'm a bit late in writing this as our system was installed last Oct 2025 but wanted to give a big…read moreshout out to Sunlight Electrical. My mom and I couldn't be happier with the service we were provided from start to finish. We contacted the business in late July of last year to see about installing a solar system on our home before the end of the year. Within in days, Alessandro was here to meet us in person and provided us with a comprehensive breakdown for solar options and pricing. We loved that we were treated like actual people instead of a number in a queue. Given that there was a slight backlog of jobs they had to work through we were assured that we would have our system fully installed and activated before the end of the year, which we did! It was great working with Nick who was our onsite rep and Juan was always available to answer any questions we had by phone (of which I had many). Despite the number of times I called, he was always patient with me and provided detailed answers that gave me a better picture of our installation and how our system would operate moving forward. I can't say enough about how amazing the whole process was. Looking at our electrical bills right now and we're in awe of all of the savings we're getting, which validates our decision to purposefully oversize our system. If and when we decide to install a car charging station in our home we're definitely going back to Sunlight!

    I can't say enough good things about Carlos Gomez from Sunlight Electri-Cal Solutions…read more I've been working on a non-standard solar setup using an EcoFlow Delta Pro Ultra X and EcoFlow Smart Home Panel 3, and finding a contractor who truly understood this type of system was incredibly difficult. I spoke with many contractors, and almost all of them sent salespeople who gave generic answers or tried to push cookie-cutter solutions that clearly didn't fit my setup. Carlos was completely different. From the moment he arrived, it was clear he wasn't a salesperson -- he's an engineer, and it shows. He took the time to deeply understand my system, reviewed actual spec sheets on the spot, and immediately identified issues that other contractors completely missed. Multiple companies told me Hyundai panels would work fine. Carlos checked the amperage limits, applied proper safety margin calculations, and clearly explained why those panels would not work with my EcoFlow system -- saving me from a costly mistake. He also walked me through: Proper panel selection within voltage and amperage limits Safe string configurations and series wiring How to maximize roof space while staying within code Permitting requirements I hadn't been told about before On top of that, Carlos identified critical code and safety requirements that no one else mentioned: Bollards required in the garage to protect battery units Correct battery placement to maintain required clearance from doors and entrances Heat detector requirements for battery installations in a garage These are all things that would have caused inspection failures later -- and Carlos caught them immediately. He spent well over an hour with me, climbed onto my roof to check for obstructions, inspected battery placement, reviewed wiring paths, and answered every question in detail without ever rushing me. What truly sealed the deal was how efficient and transparent the pricing process was. Carlos was able to turn around a detailed quote very quickly, and when I received it, I was honestly surprised -- it was a significant amount lower than every other quote I received, even though his evaluation was by far the most thorough. Given everything: His technical expertise The level of detail and care The ability to integrate with my existing system The fast turnaround And the much better pricing Choosing Sunlight Electri-Cal Solutions was a complete no-brainer. Carlos is knowledgeable, meticulous, honest, and genuinely passionate about doing things the right way. After meeting him, I completely understand why this company has such strong Yelp reviews. If you're in the Bay Area and need electrical or solar work done the right way, especially for a non-standard or custom system, I highly recommend Carlos and the team at Sunlight Electri-Cal Solutions.

    Alcor Solar Pool Heating - Alcor Solar is a stocking distributor/dealer and have full stock available at all times.

    Alcor Solar Pool Heating

    (30 reviews)

    We hired Alcor Solar to install new thermal solar panels for our pool, and the entire experience…read morewas very positive. Sue, the office manager, was great to work with--she was responsive, helpful, and kept us informed throughout the process. Joe came out to provide the estimate, and he and another installer completed the installation in just one day. They recommended using a pool cover to help retain heat overnight when temperatures drop, and that advice has worked well for us. Since installing the system and using the pool cover, our pool temperature has been averaging around 82°F in the morning and warming up to approximately 85-87°F during the day. We haven't experienced many really hot days yet, but so far the system is performing exactly as we had hoped. We're very happy with our decision and are glad we finally made the switch to solar.

    I had a real "good news / bad news" experience with Alcor Solar. The good news is their technician…read moreJoe. When he arrived, he diagnosed and fixed my solar-pool plumbing issue in minutes--professional, efficient, and friendly. If my review was based solely on his work, it would be five stars. The bad news is everything leading up to that visit. I first contacted the front office on April 16 via email and received a response from Sue. Responses were slow and vague; I could not even get a ballpark estimate without repeated follow-ups. My last email requesting scheduling went unanswered, and then--three weeks later--Joe called on May 6 saying he was eight minutes away. I had no idea I'd been scheduled, and I was just lucky to be home. Bottom line: if you can get on Joe's calendar, you'll likely be happy with the repair. Just be prepared for shaky communication and scheduling from the office staff.

    Ambrose Solar - Wow! Wow! Wow! Gorgeous solar install by Ambrose Solar!

    Ambrose Solar

    (280 reviews)

    My husband and I dug in our heels FOREVER, when it came to getting solar. There were all kinds of…read moresalespeople who came to our home on a monthly basis, and we just never had a real peace about being able to trust what we were being " sold", or told. My parents purchased solar from a HORRIBLE company that sounds a lot like 'SunFun'. After they passed away, and the house was sold...we were STILL making the monthly payments for over a year!!! That SunFun organization REFUSED to transfer the solar to the new homeowner, and eventually stopped taking or acknowledging our calls. It wasn't until we had to threaten the new homeowner with a lawsuit that SunFun finally transferred ownership. Due to this, we could not trust any of these solar companies...that is, until Kevin Bedard came to our home, and explained everything in great detail to my husband and I. He took the time to hear about our concerns, and he showed us how he truly cared. That same week, we spoke to two other families who shared their positive experiences about Ambrose Solar that made us feel that we would be in great hands. We had FINALLY FOUND A PEACE about getting solar on our home; KNOWING we would be in good hands, and we were ALL IN. It's been six months now, and we are beyond pleased with our solar panels, and the two Tesla batteries we have purchased. We are true fans, who have NOTHING but RAVE REVIEWS for this company. If you don't have solar, or if you need to add solar, Kevin Bedard is your man! and Ambrose is your company. Every employee has been amazing and helpful. In a world where customer service has taken a dump, this company has remained a class act. So again...if you are considering solar, call Ambrose, and tell them Albert and Rhonda sent you.

    They did a great job all around I greatly appreciated how their team reflected the people in the…read morecommunity. The sales, installation the technicians that monitor your system were all very knowledgeable and helpful. If we ever need to add our upgrade our system I look forward to calling them again

    NorthStar Solar - Northstar Solar installing solar on an Amazing day in the Bay Area

    NorthStar Solar

    (124 reviews)

    We can't say enough great things about our experience with our solar installation from Northstar…read moreSolar in Danville. From start to finish, we were so comfortable with every individual we interacted with. Our salesman, Patrick was no pressure, extremely helpful and very responsive. Danielle in the office was a joy and our project manager Jason was there for us all along the way. The install crew was phenomenal and completed the entire project in two days. We absolutely love having battery backup especially from 4 to 9 PM when PG&E charges the highest peak rate in the Continental U.S. California has the second-highest electricity rates in the U.S., (only behind Hawaii) which makes receiving power from the sun especially rewarding. If you are considering solar power, we highly recommend giving Northstar Solar an opportunity.

    Wow, I cannot say enough good things about Ryan and his team! I hired them to remove our 69 solar…read morepanels and reinstall them after a re-roofing of our home. It's a nerve wracking process but Ryan gave me reassurance things would go well. Upon Ryan's recommendation, we also decided to replace the solar panel racking system installed by Sunrun because we were plagued with roof leaks due to improper sealing of their footings. Ryan and the Northstar team were absolute champs at removing and reinstalling the new system for us. Everyone we dealt with was so professional, kind and easy going. The work was beautifully done and based on all the photos and detail provided by Ryan I am confident we will be safe from leaks going forward. He also had to coordinate the reinstall with our roofer and everyone handled it so well. I 100% recommend Northstar and the team for this task, and also wouldn't hesitate to hire them for roofing based on their strong work ethic and product with our solar project. The price was fair and in line with other quotes I'd received. A couple of questions unrelated to this particular job have come up and Ryan has gone above and beyond to help me out by providing his professional input. So happy with these guys. Thank you!

    KOTA Energy Group - solarinstallation - Updated August 2026

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