Denis and his team are great - hard-working, detail-oriented, and knowledgeable. We initially called Denis for an electrical emergency, and he came out the very next day. He quickly diagnosed the issue and explained that our existing breaker panel from the original construction was not wired correctly and showing signs of overheating. Denis provided a temporary fix to keep everything safe and clearly walked us through the problem, next steps, and his recommendations. He helped us get the necessary permit quickly and scheduled the full repair to replace the breaker panel without delay. The quality of their work is excellent, pricing is reasonable, and on top of that, Denis and his team are very nice people. I would recommend them to anyone needing electrical work done. read more

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Dennis was great from quote to finished project. He gave clear and competitive quotes. He arrived prompted and completed work. I would definitely use Sine D again read more

Excellent response time, good value for the work, and excellent service installing my ceiling light fixture. Will definitely use again!

I quoted the small project (fixing a wiring issue) using yelp and chose Sine as their initial response was the most helpful and reasonable. They were also available within a couple days. They resolved my immediate problem and the price was reasonable given the amount of time it took to fix it. I've bookmarked them for my future electrician needs! read more

Amazing qualtiy of work - Dmitri is the best! Good value and fast work done within timing constraints

Dennis was prompt and professional. He methodically diagnosed several electrical issues and made recommendations. He also shared advice on planned upgrades. I would definitely work with him again. read more

Dimitri came within 2hrs of us contacting him (on a holiday weekend), and helped us resolved the issue immediately. Great service!

Great care and fully explained all options. Highly recommended. Pricing was reasonable.

Reached out to Sine D through Yelp. Den sent me a message and scheduled an appointment for the next day. Dimitri came out and replaced my doorbell transformer and installed some smart switches. He also inspected the wiring in my garage and added GFCI protection. Everything is working great! read more

Reached out for a very simple, but physically tough job of adding constant power to some bathroom fans in a tight attic. Dennis responded and was not only one of the few business that clearly actually read my request (not just a generic "we do service! give phone number!" replies) but also actually looked up my fan model and sent over the wiring diagram to ask more in depth questions. The technician that showed up, Dmitry, did a great job and charged a price right in-line with what Dennis quoted me for. From contact to completion was a very quick 2 day turn around and the service was excellent. read more

I had Sine D install an EV charging station on the side of my house and was extremely impressed with the entire experience. They were punctual, transparent about pricing, and very responsive throughout the process. The team worked professionally on-site, finished exactly on time, and the craftsmanship was perfect. I highly recommend them for anyone needing an EV charger installed and will be using them again for future electrical work. read more

Efficiency, reliability, honesty, and quality of work! Also, appreciated the open & friendly communication before/during/after the projects and alerts that tech is on the way! Pro level--Just the whole 9 yards. I am a small business and I put in 100% into mine. Denis & team do the same and helped with many mini projects that have a huge impact on keeping my business running. Would hire again, and again! read more

Very prompt response and good polite service. Good knowledgeable professional. Did the job in a quick time.

Dimitrii from Sine D came and installed an EV charger at my house and did an amazing job. He arrived on time, was very explicit with what he was going to be doing and what all of my options were (clearly explaining the cheapest option to the most aesthetic option, and making sure I chose exactly what I wanted) , and had the utmost professionalism from start to finish. I would highly recommend Dimitrii and will be using him for any electrical needs in the future. read more

Really wonderful experience working with Dimitrii from Sine D/Super Den to install a GFCI outlet (including crawling under the house to run the wire) and troubleshooting a light fixture. He was prompt, professional, and fixed the issue right away. I appreciate that he explained everything as he was doing the work and never felt like he was upselling me. Will definitely recommend to anyone needing an electrician and will call them first with anything that comes up in the future. I felt that the price was very fair for the work done. read more

Absolutely stellar service! Not only did he convert several of my fluorescent fixtures to LED but he diagnosed and fixed a problem I'd been having with my ovens, all in the same trip! He and his colleague worked until they properly diagnosed the problem and then repaired it on the spot. He's my new electrician! Speedy, responsive, reasonably priced and respectful of my property. Highly highly recommended! read more

Showed up early and was very efficient. He had the proper part an available and was able to make the necessary repairs. It didn't take much time. read more

We had a tripping breaker problem in the house, and Denis was able to accommodate us the next day after we submitted the request. Other electricians didn't even bother to reply to my request. He came on time and found out the root cause of the issue, along with fixing other problems we had with our main panel. He explained everything and cleaned everything after himself. His prices are reasonable, and he gave us a warranty for the fixes. I'm glad we found him, and I'd definitely call him again if needed. read more

My old outside outlet didn't have proper water-proof feature. One day it got shorted and triggered the breaker. Denis is responsive with inquiry and showed up the next morning. After being briefed about the situation, he was able to quickly access the problem methodologically. He confirmed it's only the outlet that got damaged while the wires remain intact. And he proceeded to replace the outlet with details taken care of. The entire experience was smooth and efficient. Not to mention his charge is very reasonable. I would highly recommend Denis to every friend. read more

Sine D - Outside outlet installed with proper seals - Electricians Near Me - San Jose, California

I hired Sine several times to install new outlets. They always do an exceptional job. Will definitely hire them again if I need an electrician. They are very experienced and professional. read more

Called for a Ring doorbell installation. Dmitri was able to come on the same day. Called before coming. He checked the old transformer and confirmed it is working and suitable after some tests. Cheerful, explained stuff and completed the job efficiently. Will recommend these guys for quality work at a reasonable price. read more

Deniz was excellent and promptly communicated to arrange the replacement of a ceiling fan with lights with a newer, smart fan and lighting system. He is very punctual, performed the work exceptionally well, and I highly recommend his services. In fact, he offers a wide range of services. I plan to have him install an electric and solar panel monitoring system for me. read more

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Denis was very professional, they communicated timely about the appointment and arrived on time. He was able to fix my lights and door. He even gave a guarantee of 12 months on his work. Highly recommend them for any house tasks. Definitely hiring them for future work read more

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Alex helped setup an EV charger. He was quite thorough in explaining my options, grabbed the required parts and wrapped up the setup in a couple of hours. Yelp interaction was easy and to the point. Highly recommended! read more

I had to replace bathroom ceiling exhaust fans. I sent yelp messages to multiple companies. Sine D promptly responded and their estimate was good. They came to the house on the same day and replaced two exhaust fans. They worked very hard and explained what they were doing. They also found electrical wire connection problem in the attic and explained what was the issue. I also asked them to fix the issue, too. They cleaned up the area after the work. I'm very satisfied with their work. Overall, it was very easy to work with them, and I will hire them if I have another issue. read more

Wow! We requested a quote for a Tesla Charger in our garage and within 2 hours, Sine came through with the best price out of 8 other vendors and were at our house installing our ev charger the next day. They performed their assessment and went to the store to get the proper materials. It took a couple hours and we couldn't be happier with the results! Thank you Sine! Highly recommended! read more

I have hired Dennis multiple time for different jobs . We recently had an issue with electric cooktop . Dennis patiently diagnosed the problem and recommended best possible course of action. Living in an old house there many unknowns that tech would discover during the job . Dennis would always recommend multiple solutions and provide his best pick. He has always been on time, excellent communication and very knowledgable about his trade . read more

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Dmitrii and SineD did an excellent job with my issue. I had a Tesla EV Charger installed by another company a year and a half ago. It lost power 2 days ago. When I did a quick inspection, I could see there was some fire/heat damage at the junction box and the electrical wires were burnt through. I put a Yelp project request online on a Saturday morning. SinD responded instantly. I sent them a few pictures and they diagnosed the cause of the issue over the phone. The previously electrical company used Blue winged wire nuts which were unsuitable for a 60 amp breaker with a 48 amp car charger. They likely loosened up over time creating resistance and heat causing the damage. This was a very dangerous situation. SineD sent Dmitrii out that same Saturday afternoon and he had the issue repaired in a hour. They replaced the splice with UL-listed mechanical bolt-type splicing connectors rated for #6 AWG copper and 60A continuous load. They correctly used a torque wrench which insured that the connectors wouldn't come loose creating another dangerous situation. This is something the other electrical company should have done in their initial install. SineD took it a step further and opened the EV charger that was in an area away from the danger and torqued down the bolts in the charger according to the manufacture's specs to make sure there there were no resistance issues there. I'm really happy I went with SineD. They fixed my issue quickly, they charged me a really fair price and they knew exactly what the previous electrical company did wrong right away and what to do to repair it correctly. They also did a nice job writing up the details of the issue on their invoice so that I can go back to the original electrical company to get a refund. read more

We appreciate the prompt reply and they were able to send their technician, Sam, to repair our broken electrical panel the same day. Sam was very professional and efficient for this services. We definitely will reach out to them for the next project for our house. Thank you! read more

Denis (the owner & partner) responded right away when I requested for a quote for installing an EV charger, gave me a very reasonable quote up front, answered my follow up questions promptly. I decided to go with them. Alex (the partner) came to do the installation (on time, I should point out). Did an on-site evaluation, proposed a few options to do the installation while addressing my concerns. Did a very professional job (as far as I, an engineer myself, can tell), patched up the drywall, cleaned up the work area. I'd highly recommend them for EV charger installation (& other electrical works). Their price is very competitive. Oh, turns out they also do plumbing and HVAC works. Would definitely keep their number around! read more

SineD did an absolutely great job! He not only fixed four of my fluorescent tubes, and many other broken things in my house. Was efficient, price was reasonable. Highly recommended! read more

I had a few things that needed attention. He came and fixed some of it, gave me options to fix one project, which he started. We had to wait a few days, which he came back to complete. Excellent service, communication, knowledge and professionalism. Will definitely be calling for more services! read more

Excellent communications, professional, and good quality work. Thankful for finding SuperDen and for their plumbing and electrical services rendered resolving a mysterious long-time drain issue and installing a new exterior high voltage circuit breaker, conduit/line and new weatherproof outlet for an EV charger. Very satisfied. Highly recommend! read more

Denis is a super nice guy, upfront with pricing, good communication, and on time. We had a Tesla charger that was overheating and he figured out the issue, made a recommendation, and fixed it all in the same day I reached out. Will definitely call him again if I need electrical work or any of the other sevices he offers. read more

Great folks, great work. Everything happened timely and effectively at my house, both indoor and outdoor work. No BS. Highly recommended!

Dennis is simply a magician. He worked on a lot of projects at our home. He completed installation of the following: 1. an EV charging outlet 2. surround system and TV mount 3. pendant lights and recessed lighting 4. ceiling fans 5. Google doorbell 6. Fixed our a/c unit and made it compatible for Nest thermostat. 7. Additional circuit breakers He pays attention to details and makes sure it's working before he leaves. And he leaves your place immaculate. I was definitely impressed by his work quality for our surround system. Very neat, precise and symmetrical. He gives you an upfront reasonable price and sticks to it. He is worth your time and price and I definitely recommend him. I would be using his services in the future. read more

Sine D - The doorbell that Dennis installed! - Electricians Near Me - San Jose, California

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Had a great experience with Denis. I blew a fuse in my bedroom and he was able to come the next day. He texted me ahead of time to confirm his arrival time. He was efficient and found an easy solution to my issue, for an incredibly reasonable price. He's also super nice and easy to work with. Would gladly hire him again! read more

Had a previous install via TaskRabbit that was incorrect, with mistakes, caused a lot of headache. D quickly to responded to my message and arrived within 24 hrs to inspect. He immediately able to identify the problem, clarify his assumptions with a colleague, and proposed solutions. Highly recommend! read more

Denis was amazing! I had an issue with my AC heating my condo, and access to the AC was on the roof of my building. He made time to come by and help on the same day with only a few hours notice and through rush hour traffic. Denis worked on troubleshooting thoroughly, had a capacitor ready to go in his car that he used once he figured out what was causing the issue and worked on the terrace for 2+ hours. It's worth noting this was during an excessive heat warning in 90 degree weather! He took a few trips between the terrace and my condo to make sure the AC worked perfectly before leaving and also provided a guarantee in case any issues come up which gave me a lot of reassurance. Thank you Denis!! Will definitely be in touch for any of my household electrical needs in the future read more

Highly recommend Sine D. Very thorough and professional. Will definitely work with him going forward. Thanks you Sine D.