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603 Solar

At 603 Solar, we pride ourselves on our educative approach to showing people the advantages of 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. The world of solar can be intimidating and confusing. That is where we come in. Our team of experienced solar professionals will come to your home and take a look at your situation to see exactly how solar could work for you. We then design your system, get permit and interconnection approval, coordinate the installation and monitor the system once it’s powered on! With over 15 combined years of experience in the solar industry, 603 Solar truly understands how to get home owners the best return on investment. Call us today to see how solar can work for you!

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603 Solar is a solar energy service based in Portsmouth, NH. We wanted to begin a solar company based on the values of integrity and honesty, providing an amazing customer experience and getting people the best return on investment.
Year Established
Phone Number

Services Offered

  • Installation

Associated financing companies

  • Vermont State Employees Credit Union

Workmanship Warranty

Contractor warrants all solar-related work for a period of two (2) 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.


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

Industry Certifications

  • Better Business Bureau

Manufacturer Certifications

  • Gold Installer
  • PWRpartner



States Served