Get matched with top solar panel installers in Upper Lake, CA

We specialize in all your home solar panel and battery installs. We pride ourselves on the quality work we provide, while delivering great customer service! Check out our home solar offerings below and call -or- click to schedule a free estimate today.

"We have worked with Spartan on multiple projects whether it was for a custom home build, or having them take care of my customers roofing needs while we handled a different part of the project. I have no worries when I refer customers to Spartan and can always rely on them to get my projects done when needed at a good value and in a timely manner. I'll be using and recommending Spartan for years to come."

"Joe is hard working, diligent, and honest. I hired him 1) to put up an antenna for local tv service and 2) to fix poor wifi signals. TV was converted from cable rapidly using leftover wires. Saving $ not paying for cable and streaming off wifi. Great signal strength! WiFi was harder. He worked with ATT to determine my new iMac was sucking signals. He installed a more powerful router that solved wifi issues when iMac is off. Now I have to work with Apple to figure out how to manage the computer searching. I would not hesitate to call Joe back again. He is an excellent technician and a fine person. He is pretty busy, so sometimes it takes a few days before he can come out, but he is worth the wait."

"He is very friendly, efficient and professional. He has follow through on projects, persists in solving the issues. He has installed a water tank, pump, boiler and drip system for me. He is very versatile."

"Great job on the house, they had everything installed in 3 days and once the LAWP Panel from the power company and hooked everything, then everything was working well. they took care of all the paper works and documentation, and everything was done quickly. Best price available for us."

"Gary was very knowledgeable and helpful during this process. He worked very diligently to get us the best deal."

"Trevor Flahive was the nicest person to come out and give an estimate.. his knowledge of solar panels was the best I’ve heard.."

"He is very diligent in getting it right, he is very meticulous and he did a great job. His price is considerably lower than other companies."

"It went very well. Everyone was very informative. They kept me up to date with the process and whenever I had a question, they were really prompt with their answers whether by email or phone. They were on time when they say they will begin work and the guys that installed my solar panel and inverters were very clean. I mentioned that I'm very worried about leaks because my son is very sensitive to mold and they made sure to seal everything very well n show us the work they've done and ask if we see anything that needs to be addressed. I was very pleased with the whole process. And it was easy, they took care of everything."

"Landmark construction and energy crew executed a whole kitchen renovation for us, including custom cabinets, new floors, new countertops, electrical (sub panel with lights and switches), recessed lighting covering, plumbing fixtures, took down wall to expand the kitchen area by merging it to the living room space. The cost included all the materials for cabinets and countertops, backsplash tiles, new floors and the appliances. We are thrilled with our new kitchen! Charlie, Nir and the workers did an excellent work and while the whole job was completed in less than a month. You could see how hard they worked in order to keep the work moving so it will be done in that time period that they originally promised us. On top of that, they worked hard to get things to our requirements (i.e. to stain the cabinets, complete the paint etc…). We all were pleasant and satisfied to have them work at our house and mainly with Charlie (project manager) that was approachable and supportive when we had requests or problems. I must mention that on few times, we were bothered with some of the workers when they didn’t show up when they should, or worked more hours on the electricity panel. Clearly enough, it’s normal that you must have to handle a lot of problems when you decide on going for this type of project. The final cost was the same as we agreed with them at first, although we were sure that it will be increased due to some additional things that we did during the work and that were not included in the first estimate/agreement. Overall, we would give LANDMARK CONSTRUCTION AND ENERGY CREW Construction a strong recommendation!"