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603 Solar

In a world where there are so many solar companies to choose from, how do you make the right choice? Three words come to mind: transparency, accuracy, and integrity. At 603 Solar we take an educational approach to solar as there are many factors that go into designing a system that is tailored to your exact needs. Each home uses a different amount of electricity and has different concerns regarding shading and orientation. We make the entire process simple and straightforward from conception to commissioning, while providing the best possible customer service!



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603 Solar was established in The fall of 2018 and since has helped nearly 1,000 home or business owners make the switch to solar. The company was formed by Zachary Haithcock, Sean Carlson and Scot Johnson after collectively witnessing a lot of deceit and dishonesty in the industry. With relatively little regulation solar companies were taking advantage of more and more home and business owners - something had to be done. 603 Solar was created with one purpose in mind: educating home and business owners on the benefits of solar energy, in the most transparent way possible, and assisting them in their solar panel installation so they can receive the best return on their investment. In 2023, 603 Solar was named the # 1 Solar Company by both the "Best of the 603" magazine and the "Best of the Seacoast" community choice awards.
Year Established
2018
Phone Number
603-570-2607
Reasons Why You Should Work With Us
  1. Highly rated local business

  2. Transparent educational approach to solar

  3. System production guarantee

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Elite installers earn top ratings from customers, endorsements from vendors, and win customers more frequently than their peers.

We speak

English

We offer turnkey solar design and installation services for residential and commercial properties. This includes everything from conception to commissioning: design of the system, engineering, permitting / interconnection, installation / inspection and finally commissioning / post install support. We strive to make the process as transparent and easy as possible!

Services Offered

  • Installation

In a few short words - our team is lean and mean. While we embrace the "small, local company" vibe, we boast "big company" results. We are one of the fastest growing and reputable local companies in NH. Our team ranges from college graduates just getting their foot in the renewable energy industry, to 10+ year veterans who have seen it all! No matter how big we grow our team will always embrace the small company vibe and put our clients first.

Associated financing companies

  • Vermont State Employees Credit Union

Workmanship Warranty

Contractor warrants all solar-related work for a period of twelve (12) years following completion. The system’s most critical components – the solar modules and inverters—are covered by 25-year performance warranties, which protect against component-related failure.

Licenses

Electrical Corporation License (0594C) - Zachary Olster 15155

Insurance

We carry both General Liability as well as Workers Comp insurance. Copies of both can be furnished at your request.

Certifications

FAA Remote Pilot (Drone)

Industry Certifications

Manufacturer Certifications

  • Gold Installer
  • Q.PARTNER

What Customers Are Saying

5.0
14 reviews
5.0
Average Rating 14 review(s)
Response
5.0
Quality
5.0
Value
5.0
Service
5.0
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Smooth Sailing with 603Solar

After many years we decided to install solar for our electrical needs. After evaluating local vendors we selected “603Solar.” The communication was excellent, the process was systematic and efficient with clear congruent communication between all tasks . The result was a very high quality installation completed and operating ahead of schedule. This is a state of the art company that understands the value of quality and customer satisfaction. We highly recommend 603Solar. Steve Hollis, NH

Posted by stl on Nov 27, 2024
603 Solar - Great experience start to finish

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.

Posted by jturner on Sep 30, 2024
Efficient

I was very happy with the service I received with 603 Solar. Every response was clear, efficient and informative. The prep, installation and post installation approval process went smoothly and quickly. Thank you, The Sanders family

Posted by michael.sanders1 on Jun 20, 2024
Very Good Experience

Jeff Cantara and 603 installed Enphase inverters and Q Cell 425 watt panels for me. Excellent, painless, reasonable price. John

Posted by johnlumbard on Mar 26, 2024
Couldn't be happier!

603 Solar has been great. Our "salesman" Jeff was very informative and honest. He actually talked us out of spending additional money on "add-ons" that a previous solar company pushed us to do. Jeff also made several revisions to our design at our request so we could get things "just right". 603 kept us informed throughout the entire process, their installers showed up when they said they would and didn't leave any mess/debris behind when they were finished. The entire process from our initial meeting with Jeff to when we were able to "turn on" our new net meter took less than 2 months.. and part of that time was waiting for permits and the utility company.

Posted by jeremy on Mar 18, 2024
603 Solar - Talk to them before making your decision

I was very happy working with Jeff Cantera at 603 Solar. He has a vast amount of knowledge and loves what he does. He can be very technical but also answers basic questions. We had very pushy solar company put in connection application before we had all our questions answered. Jeff and 603 solar to the rescue. Jeff answered our questions and helped us navigate the process with town and Eversource. 603 even helped us remove the other connection application. Very good experience with Jeff and everyone at 603 solar.

Posted by kclarkejr on Mar 14, 2024

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