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Granite State Solar

Granite State Solar would love the opportunity to design and install your Residential or Commercial Photovoltaic (PV) solar array, either on the roof or ground. We are happy to answer all of your questions and walk you through the process.
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In continuous operation since 2008, Granite State Solar is a 'no pressure' solar company that strives to satisfy our customers no matter what it takes - we do what we say we are going to do, every time.
We are a full service operation, offering numerous value-added services - our many years of experience, a Solar Log included with every installation to monitor your production for the sale of REC's, and a team of friendly installers that are all electricians and never sub-contracted.

We offer custom-fit solutions for just about every location, to drastically reduce or even eliminate your utility costs. We handle all of the paperwork, including permitting, engineering reports, building inspection, REC integration and the NH State rebate, so all you have to do to is sit back and enjoy your savings! Take advantage of 2.99% no money down financing and be sure to check out our many 5 star reviews on line!

We look forward to hearing from you!
Year Established
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Services Offered

  • Installation
  • Financing
  • General Contracting
  • Solar Repair & Maintenance

Associated product manufacturers

Associated financing companies

Workmanship Warranty

Workmanship is warrantied for 12 years. All of our panels carry a 25 year warranty.


All of our installers hold an Apprentice, Journeyman or Master Electrician card. We are licensed with the Joint Board of Licensure and Certification in the State of New Hampshire, license #12218M.


We carry full coverage insurance, including General Liability, Auto and Worker's Compensation.

Industry Certifications

  • Solar Energy Industries Association
  • Tesla Powerwall Certified

Manufacturer Certifications

  • Platinum Installer

What Customers Are Saying

14 reviews
Average Rating 14 review(s)
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GSS: Great company

We are going into our third summer with an 8 KWH rooftop system installed by Granite State Solar. The system is performing as promised, and the installation has been trouble-free, with the exception of one connection to a microinverter that worked loose, but was fixed quickly. Staff has always been responsive to my questions. We are now considering adding an Enphase 10 KWH battery to the system.

Posted by Geopacko on Mar 31, 2021
Solar installation

I was very pleased with this company,everything that was said was completed in a very professional manner. Every question answered quickly and politely. It was a pleasure doing bussiness the old fashioned way.

Posted by arthurjcushing on Sep 30, 2017
Pressure free easy going company

We found their no pressure approach perfect for such an important decision. They always responded promptly to our questions as well.

Posted by anthonyferenc3 on Aug 15, 2017

After previous failed attempts at going solar we were skeptical, but GSS made the process very simple and transparent. They handled all the paperwork with the State and power company which was a great help. The installation of our system was completed in just one day and the crew were all very friendly, professional and on task all day. A few days later the power company installed our net meter and we’ve been making power every since! The system is operating exactly as they explained it would and we couldn’t be happier with our decision to go with GSS. The Stark Family Grantham, NH July 2017

Posted by jonathan.h.stark on Jul 24, 2017
Awesome work and great customer service!

Our experience with Granite State Solar was great! The install was seamless. Great customer service! The installers we're super friendly, fast and informative. Our solar adviser Eric was so helpful, and friendly. Was great at walking us through the entire process. Responded to Emails super quick. Also was able to accommodate our busy work schedules. Outstanding work all!

Posted by summer.mooney on Jun 29, 2017
Awesome and thanks!

YOU all at GSS are fantastic ! Our solar installation went like clockwork and everyone involved was knowledgeable, courteous and professional. Andrew Spiegel did and unbelievable job of explaining the ins and out of the system and he clearly knows his stuff and presents the options in a balanced way. I highly recommend GSS to anyone who is thinking of this again to team and all who participated, Thank You !

Posted by david on Jun 25, 2017
    • Solar PV
    • 6.6 kW
    Solar PV on existing house



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