We had a great experience with 603 Solar. They did what they promised and installed the system on time. Everything has worked out great for us. This was a second system for us..

Like all of the reviews I have read, 603 Solar and Grateful Electric did an excellent job throughout the process, from planning to installation, to activation. I'm totally happy with the end-product. I'm doing laundry right now 100% on solar power.

It was truly a pleasure working with 603 Solar. Gabe was excellent helping us get the panels up and working! High 5 to Steve and Gabe!!!

Dealing with 603 Solar was a pleasure from start to finish as we replaced an old PV system with a new, upgraded one that will cover all of our electricity usage, including heat, hot water, and an electric car. Their service was outstanding at every step of the process. My work as an energy consultant keeps me fairly well-informed on renewable energy systems, net metering, etc. Steve Cavallero eagerly and honestly answered all the technical questions I threw his way. I highly recommend this company!

After 5 quotes for a solar system, 603Solar was the most extensive site assessment and solar evaluation of my home. The discussion was extensive and detailed with a lot of questions and answers from both parties. Their choice of materials for both a roof and ground mount matched my own research of what would be superior products that met and exceeded my expectations! Communications were extensive and honest from the initial interview and from the installation team and post installation. An excellent company that showed top notched consideration for the customer. I am looking forward to great post installation support and they will be my first choice for my battery and future EV charging system with possible generator backup. My highest recommendations. A great balance of PV system, capacity, reliability, warranty, price and products from the top tier PV developers and suppliers. You can comfortably go green with 603Solar!

603 Solar is the company we chose to go with after interviewing several other solar companies. No one answered our questions and the manner and as thoroughly as 603 Solar. Don’t hesitate to call them. We are. We were thrilled with their service, install of the solar panels, the electrical team, and most importantly the savings we are now receiving!!

We can't say enough about the work of 603 Solar and the way they partnered in every aspect of the process for our home in Durham, NH. Zach called right away after our initial inquiry and within days we were in process to have panels installed on our barn. Zach and Sean communicated well at every turn, and they worked with the local inspectors and even with Eversource to arrange a transformer upgrade on the pole that services out house. Installation happened in the blink of an eye, and they even recommended a great electrician (Grover Electric) to do some additional work at our house. We've been up and running for about six weeks now and we appreciate the many ways 603 Solar made it happen.

Joey Deluca was incredibly helpful in my research for solar options. The late night emails and quick responses helped me understand everything that 603 Solar had to offer. This business knows how to support their customers.