Shout out to Tamara Kleinman in Sales!…read more I called Allterra based on their awesome Yelp review. I needed advice on how to approach adding to my existing solar system. She called back promptly, was a great listener, and came across as friendly and helpful. She really represented the company well. I look forward to working with them on things in the future.

Allterra installed our solar panels years ago and just recently had to remove and reinstall them…read morefor a house remodel. We have dealt with many different contractors and vendors over the past year and encountered many stressful and frustrating situations. We were honestly expecting something to go wrong in the reinstallation process, but Allterra's team was organized, set clear expectations and communicated promptly and respectfully. What a breath of fresh air! We now know an excellent company is not easy to come by and greatly appreciate their work. Highly recommend without reservations!

My experience getting solar and batteries installed by Sandbar Solar was great. I reached out to…read moreAndreas from Sandbar in late August of 2025 after being recommended by a friend. Andreas met with me that week and we discussed our goals, system design and size, and how it would impact our current energy bills. Given the tax credits ending at the end of the calendar year, I knew I most likely wouldn't be on the schedule to install and commission my system before then but Sandbar worked with me to find a financing option that provided many of the monetary benefits of the tax rebate with minimal restrictions. Sandbar completed a site audit in September and finalized the system design in November. Just after the new year, I got word that all the pieces were in place and Sandbar would start applying for permits and work with PG&E to be able to schedule our install. Drake and his team came out in the second week of January to start the installation process. I was kept in the loop and told what to expect for each day of the process. Installation wrapped up within 4 days with minimal impact to our lives and we began a dance with PG&E to sign off and install a meter collar that unfortunately lasted a few weeks, all the while Sandbar kept me up to date. Once PG&E installed the meter collar and signed off, Sandbar was back out quickly to commission the system and get me fully set up. Since commissioning, I've already seen a great impact on my winter energy bills and look forward to the rest of the seasons. After installation, Sandbar went the extra mile to help me navigate the San Jose Clean Energy rebate program after some initial issues applying and receiving the rebate. They worked with me and SJCE to ensure that I qualified and that I would receive the full rebate for my battery installation. I've already recommended Sandbar Solar to others and I'd recommend them to you as well, dear reader.

All smooth and no cost creep...we did not expect that! When we decided to get solar we buckled up…read morefor a bumpy process (which some of our friends experienced) and a painful installation and... NOPE. That was not the case. All smooth and no cost creep. That is because we chose Sandbar. Sandbar is truly different. A step above others. And now we know why. 1. IN-PERSON. Others provided us a quote by email sight unseen. That made us feel weary. Sandbar came to see our house first, inspected all the areas that would have been affected by the installation and by meeting us they understood what our energy goal (present and future) was and our peeve points. That turned out to be CRUCIAL for us and I still believe today that assures no surprises. BTW, no cost associated to this in person quote. 2. NO $ SURPRISES. No cost creep. And nope... their quote was not the highest either of the ones we got. 3. COMMUNICATION. They are good communicators at every level. From David to Jocelyn to Alicia. And they seem to talk to each other too so there were no crosswires. 4. REBATES. Their assistance goes us above and beyond and thanks to the post set up walk through visit, it includes submitting rebates, setting up the app and answering all our new-to-Solar questions. So so soooooo helpful! Bottom line: Sandbar is a mile above others. Fair pricing and excellent support. Truly a mile above others!

After waiting 18 months for a 3 day solar install project to finally be activated Premo Solar got…read moreonsite, isolated multiple instances of workmanship issues and finally activated 41 of my 49 solar panels. the remaining panels appear to be a result of the original install. I don't believe I can overstate my appreciation for their assistance in helping me stop the needless hemorrhaging of money for PG&E bills for two EVs and home consumption. More work is still needed but no fault of Premo Solar. Gabriel addressed my onsite needs, committed himself to getting me activated after hearing my nightmare story and provided follow on service with a reputable company to address equipment they do not support. I made multiple calls to similar companies in this niche and none would provide support for work done by another company. I am grateful for their assistance and will definitely refer friends seeking solar support to them in the future. Thank you Premo Solar and Gabriel for your help!!!!

From my inquiry to install it was lightening fast and done properly. These guys are great…read more Professional, friendly, great customer service, great knowledge and use of current solar and battery options, plus pros and cons of each, and their guys keep the work site clean. I wouldn't complain about a single thing. They moved an array for us (that another company went out of business so could no longer service) took over the warranty for us, and added additional panels. We will also be doing a battery install at a later date. Their prices are significantly better than the competition and so is their time line. Instead of waiting a year for another company, call Premo and have your solar done in the next week or two. Highly recommend.

There is no manual or instructions, and it's a ploy at charging customers to pay for extra…read moreservices. Rude customer service and responses from Robert!

Highly recommend working with John and team. John provided a lot of info during the quote process…read moreand helped explain differences with the panels they use compared to others. Installation was done over two days and the team (Kiyo, Zack, Nhut) did a great job. The panels look much neater on the roof than we were expecting the pool is up 10F more than normal after two weeks of heating. Excellent customer service as well with Kiyo and team fixing a leak in my pool plumbing system unrelated to the solar system.

Tyler was super helpful with some electrical issues in the home we're renting. He replaced a…read morebreaker and a few switches that needed to be replaced and made sure everything was working properly. He was professional and easy to talk to. He also took the time to explain what he was doing in a way that was easy to follow and understand. We really appreciated his help and would definitely recommend him.

Tyler did an amazing job wiring our entire 1,200 square foot art studio and installing 18!solar…read morepanels on the roof! He is extremely detail-oriented and helped guide me through designing the lighting, switches, outlets, and subpanel in the studio. He also guided us through permitting and helped ensure we got our solar panels installed and inspected in time to catch a tax credit! The pricing was very fair. Would 100% recommend Tyler for your electrical projects!

Exceptional, Best-in-Class Experience with Cinnamon Energy Systems:…read more I chose Cinnamon Energy Systems (CES) based on their weekly podcast The Energy Show, their excellent reputation, and my positive history with Barry Cinnamon 20 years ago when Akeena Solar installed my original system. Now transitioning from NEM 1.0 to NEM 3.0, it was time for a completely new solar and storage setup. CES has been an absolute pleasure to work with from the initial pre-proposal all the way to securing PG&E Permission to Operate (PTO). My journey began in September 2025 when I contacted CES and was connected with Michael Croft. Michael truly listened to my needs, assessed my current system and usage, and provided a tailored proposal. Because I was waiting on some unreleased products, I delayed pulling the trigger and intentionally bypassed the 30% federal credit for personal reasons. Throughout months of follow-up meetings, Michael checked in consistently with zero pressure. When I was ready to move forward, he conducted a detailed site visit and delivered the final proposal. Once contracted, the operational execution was flawless. Paula Hernandez coordinated the project, sending Jonathan Munoz for the preliminary design and site verification (PowerWalls, main breaker, roof layout). Jonathan was personable and explained the engineering details thoroughly. CES then coordinated seamlessly with my roofer, sending a team to cleanly remove my old solar equipment. Paula kept me informed every step of the way; the team was always on time, professional, and a pleasure to talk to. Their dedication to customer service is unmatched. When a PG&E installed the Tesla meter collar, there was no power after install, Paula was actually on a trip to Europe. Despite being abroad, she immediately answered my text, rescheduled the PG&E install, and sent Jonathan back out to perform detailed troubleshooting on the equipment to ensure a seamless setup. Later, Lucas came out to install the ground rod and went above and beyond by proactively updating the firmware on one of my Tesla PowerWalls so it would slave correctly after commissioning. The city inspection process really highlighted CES's professionalism. Our local inspector, Leonard, is notoriously thorough, tough, and fair. Even in the rain, the CES crew was fully prepared. They proactively removed one of the installed PowerWalls just so Leonard could verify the mounting screws were perfectly secured into the studs. It paid off--Leonard meticulously reviewed the roof and drawings Powerwall outputs, ultimately passing the system and noting that the crew did an excellent job. The final hurdle was PTO, which PG&E approved in an incredibly fast four working days. However, turning on the export feature in the Tesla App hit a snag. After hitting voicemail on the phone tree and getting standard "it takes three days to appear" advice from front office staff, I happened to run into Jonathan Munoz in the back office. Jonathan and Paula refused to accept the "wait three days" approach. They immediately accessed my account, updated the backend settings on their end, and had me open my Tesla app--the export feature appeared instantly. From day one, Paula, Jonathan, Michael, and Lucas went out of their way to deliver a best-in-class experience. If you want a solar contractor with deep technical expertise, unmatched integrity, and true dedication to customer satisfaction, I highly recommend Cinnamon Energy Systems.

I recently worked with Cinnamon Energy Systems to install solar panels and a battery system at our…read morehome in Los Gatos. After getting quotes and speaking to over (5+) companies, Cinnamon was an easy choice. Early on I worked with Marcus (Director, Sales) and his team and they were extremely transparent and educational. Which is a huge plus, in a not very transparent industry:). Marcus in particular, was incredibly helpful in guiding us through many options, technically and commercially. Cinnamon ended up being well priced, with many solar and pricing options. We ended up getting a 24-panel Hyundai solar panel system paired with a Franklin battery - which for me was a better call as it's larger than a Tesla and works with my generator in the event of a long outage. The installation team was great as well, with the total install time only taking about 3 days. In fact, the entire team, including Paula in project management, Joanne in permitting, and the field crew--was professional, communicative, and easy to work with. They kept us updated every step of the way, from handling the engineering plans and local permits to managing the installation. They even offered a complimentary service to paint the new conduits to perfectly match our exterior walls. Also, Marcus did an awesome job walking me through all the agreements and process. All in all, super happy with Cinnamon and the system is fantastic. Great job!

Mark Thompson (under his previous company name, RATech Solar) installed our photovoltaic system in…read more2006 as a subcontractor to another company. This year, we needed to reinstall our system because we needed a new roof and Solar Lightworkers did an excellent job on the new system design, procurement, and installation. He worked in close coordination with our roofing contractor to install the supports for the panels so that the new roof would not need to be disrupted. Overall a very good experience and we're very satisfied with the new system. We have also had Solar Lightworkers do some miscellaneous electrical work for us (undergrounding our electrical service and installation of a charger for our EV) and their workmanship has always been outstanding.

In 2009, Solar Lightworkers (formerly RATechSolar) installed 34 panels on our roof, an inverter, a…read morewhole-house generator with automatic transfer switch, and a battery backup array with solar chargers. The system has worked with very little maintenance, and has been invaluable during power outages that are common where we live in the Santa Cruz mountains. Mark and Shane did a fantastic job - everything is to code (and frequently exceeds code requirements). The price was reasonable, and Mark helped us apply for and receive the rebates available at the time. Everyone who has looked at the system has commented on the excellent workmanship and clean installation. Recently (2021) we decided to add a ground-based solar array to supplement our generation in order to support an EV car charger and hybrid heat-pump/electric water heater. Mark and Shane designed the array support system, and it is incredibly well built and solid. The installation was done quickly, at a very reasonable cost, and integrated into our existing system easily. They also ran a 240 line to and installed the new water heater, and even patched some drywall that had been removed for another unrelated job. Again the quality of work is extremely high and the system has worked flawlessly. While working on this job, they also discovered and fixed a dangerously loosely-connected neutral line in our main meter panel that could have resulted in major appliance burnouts and other hazards had it not been addressed. Mark and Shane are very good at listening, and are enthusiastic about what they are doing and want you to be happy with the results. I highly recommend them for any electrical or solar work that you are considering.

Recently engaged Simmitri for anew roof. The entire staff communicated well thru the project and…read morewe are very pleased with the results! Highly recommend Simmitri for your roofing projects.

Had questions regarding adding battery and additional panels. Lonnie provided a free consultation…read morevia Zoom. He answered all my questions, and made several suggestions based on my specific situation -- even though those suggestions did not include purchasing equipment right now.