happy couple going solar

Get Free Solar Quotes Online

Sign up to get free online quotes that include your preferred solar equipment!

Get Quotes

Granite State Solar - Profile & Reviews

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!

14 reviews

Write a Review
  • "GSS: Great company"

    Reviewed Mar 31, 2021

    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.

    Julia Westbrook
    Response from Granite State Solar
    Responded Apr 02, 2021
    Response from Granite State Solar
    Responded Apr 02, 2021

    Thank you so much for your review! We're so glad to hear that you've been happy with your system year after year and we look forward to hopefully working with you again on your battery.

  • "Solar installation "

    Reviewed Sep 30, 2017

    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.

  • "Pressure free easy going company"

    Reviewed Aug 15, 2017

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

  • "GSS!!!"

    Reviewed Jul 24, 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

    1 person found this helpful
  • "Awesome work and great customer service!"

    Reviewed Jun 29, 2017
    "Awesome work and great customer service!"

    Reviewed Jun 29, 2017

    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!

    1 person found this helpful
  • "Awesome and thanks!"

    Reviewed Jun 25, 2017

    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 !

    1 person found this helpful
  • "Top Notch"

    Reviewed Jun 06, 2017

    Everyone at GSS was great to work with. Questions were always answered promptly throughout the entire process. The team that installed my panels was very professional and courteous.

    1 person found this helpful
  • "Going solar couldn't have been easier "

    Reviewed Jun 03, 2017
    "Going solar couldn't have been easier "

    Reviewed Jun 03, 2017

    From the the first meeting until I switched on my system, working with Granite State Solar couldn't have been any easier. Andy Spiegel made everything go smoothly, and I paid nothing out of my pocket to get my panels installed. The panels look great. I'm already generating a surplus and wiped out my electricity bill.

    1 person found this helpful
  • "Granite State Solar - Great service & Install"

    Reviewed May 24, 2017
    "Granite State Solar - Great service & Install"

    Reviewed May 24, 2017

    Very pleased with the entire process. GSS answered all questions and took care of filing all paperwork. It was a seemless install. The array is producing flawlessly.

    1 person found this helpful
  • "Great Experience, Excellent company."

    Reviewed May 17, 2017
    "Great Experience, Excellent company."

    Reviewed May 17, 2017

    When we decided to go solar, we used Energy Sage to find qualified installers near us. We received 7 online quotes and chose 4 installers to come and give us an estimate. Everybody was nice and knowledgeable and we would have selected one of them, but I remembered seeing GSS trucks around so I gave them a call (they were not on Energy Sage at the moment). GSS's representative (Andy) was the only one who got on the roof and measured it. That impressed us (it was January). Their prices were very competitive too, so we chose them. We wanted a local company, with experience, but the right sized so that our small project wouldn't get lost in the shuffle. They even performed some other electrical work for us.

    The installers were great, nice people, very efficient, all around a good experience. All the people in the office is also happy to help and very responsive. Only downside was the 3.5 months in between signing the contract and having the system in operation. Part of it it's due to the utility and the town, though.

    We are very happy to have our solar system and would highly recommend GSS.

    1 person found this helpful
  • "Amazing Service, Tons of Experience, Honesty Upfront - GSS is Solar Done Right."

    Reviewed May 17, 2017
    "Amazing Service, Tons of Experience, Honesty Upfront - GSS is Solar Done Right."

    Reviewed May 17, 2017

    I started looking at rooftop solar panel installations in January (for reference, it is currently May). They’ve been dropping in price so much lately that I figured it was time to see just how much money they could actually save (don’t worry, I’ll answer this for you at the end). I contacted a few of the highly-rated companies out there for quotes and consultations, GSS being one of them. After speaking with them all and comparing their offers, their online reviews and the behavior of the associates they sent out to my house, I decided to go with GSS. The rest of the review is my story working with them but if you want the summary: these guys are an incredibly professional team that really know their stuff and work with you every step of the way. I have zero regrets about choosing them and I would absolutely recommend them to everybody looking to go solar.

    Here are the details about my experience with them.

    I called GSS up and explained my situation: “I’m interested in rooftop solar, I have some electric cars that eat a ton of power and I want to charge them with renewable energy so I need a pretty big array.” Eric Kilens was the rep that responded to my call. He came out and took some standard measurements; roof size, angle, azimuth, tree cover… the usual stuff. That took all of twenty minutes. He then proceeded to stick around and talk to me for an extra half hour about the whole process, the technology behind solar, the net metering policies in New Hampshire, electric vehicles, and just about every other relevant topic that came up. I’m the kind of guy that wants to know everything that’s going on and he was more than happy to answer. This extended past the initial consult because after each company got in touch with me I proceeded to flood their inboxes with more questions. Eric was the only one that didn’t eventually get fed up with me. He responded quickly to each one – usually that same day or the day after. If he didn’t know the answer, then he knew who to ask. He got me in touch with other experts at GSS who traditionally work behind-the-scenes like Alec the warehouse manager or Erik (with a K), one of the owners, when I had detailed questions about panel specs or inverter choices.

    Eric and I went back and forth quite a bit about array design, number of panels, brand, power rating, and even the microinverter size to go with them. It wasn’t just a “here’s what we’re going to do, take it or leave it” kind of situation… the whole team was very flexible and accommodating, even if I made unusual requests that went against their typical installations. To give you some perspective, we started the paperwork in February and we were still making changes to the plan in mid-April as new technology became available and replaced the old stuff. Eric, Tanya and Emily were always very courteous and cheerful when taking my questions and requests. This was especially appreciated during the permitting and paperwork review processes. It shouldn’t come as a surprise, but you have to get a lot of people to sign off on a solar installation before you can actually install it. These guys held my hand through the whole process though. They kept me up-to-date every day on who would be showing up to inspect which parts of my house and what that meant for the project. They took care of all the coordination between the town inspector, the utility company, and the PUC for the state tax credit. I know it was a lot of work, but I never had to deal with it. They did it all.

    After three months of preparation, the permits were finally in place and the parts we decided on had arrived. Now, my setup involved 14.4 kW of power from 48 panels in six rows across two roofs. GSS brought a team of five to my house and they managed to put the whole array together in a day and a half. These guys were just as polite and respectful as the staff I’d been coordinating with so far. The installation crew has been in the game for a while and they are masters of their respective trades – that much I gathered right away – but what really surprised me is how well they worked together as a team. They kept communication constant, they didn’t argue about anything, and they had a rhythm to their work so they all finished the important parts at the same time. I shadowed them throughout the whole process, asking questions about what they were doing and why they decided to go with one technique over another. Each one seemed happy that I was taking an interest in their work instead of just leaving them alone. I learned about electrical engineering from Phil and Troy, mounting rail construction from Nate and Brandon, the microinverter map from Darren, and panel laying from Jake and Zach on the second day. Not only that, but they told me the company’s story and a bit about their team dynamics as well. GSS is a fairly small team compared to most companies, so they have a very important advantage: they all know each other personally as friends instead of just colleagues. That was pretty apparently when I saw how they worked together, but hearing them say it was a key value of the company really made it clear. These guys are a tight-knit team, and they all believe in the mission. This is definitely the crew you want doing your solar installation.

    Eric told me early on that GSS aims to “under-promise and over-deliver”. Well, my array has been active for about two weeks now and I can confidently say that they pulled that off. The panels take care of all of my power needs and they ended up costing about $100 per month less than my old power bill. These guys started saving me money the moment the array got switched on. My roof is beautiful and slick, it’s generating more than enough to power our home and our cars, and I learned a ridiculous amount of stuff about the world of solar throughout the journey. GSS made it the experience an absolute pleasure. I strongly recommend them to anyone that wants to look at getting a solar installation.

    1 person found this helpful
  • "The Gold Standard of Solar Installers "

    Reviewed Apr 03, 2017
    "The Gold Standard of Solar Installers "

    Reviewed Apr 03, 2017

    We can't thank Eric and the folks at Granite State Solar enough for making our transition to SOLAR so easy. From the initial consultation with Eric to the financing with GreenSky and the expert installation crew - everyone was a pleasure to deal with. We looked at several other solar installers from NH, MA, and even RI, but none seemed as professional, friendly, or knowledgable and forthcoming about what we could actually expect during the whole process and beyond. We heard nightmare stories about other companies, trouble getting straightforward answers to questions, delays and trouble with scheduling, rude installers and faulty work, but our experience with GSS has been nothing less that fantastic! You guys really set the bar high and we can't thank you enough! THANK YOU!

    1 person found this helpful
  • "Praise for GSS"

    Reviewed Mar 28, 2017

    We have nothing but praise for GSS. Eric Kilens worked with us from the beginning to the end. He provided professional services that went beyond sales and was available whenever we needed him.

    Our site was difficult--in the hills, one mile up a dirt road, over ledge and then along a ragged “path” to the south facing slope site. The slope was densely wooded with second growth trees that required two cuts.

    The installation team was excellent and it was a tough job. The cement as well as all the installation equipment had to be hauled over the rough terrain.

    We’d like to give a special thank you to the electricians, Troy and his team, who in addition to their excellent work called out an unrelated safety issue at our camp that has since been fixed.

    Months later, Eric has helped us through problems (not of GSS’s making) with our meter as well as selling our SRECS.

    All the GSS people we worked with were not only very professional but congenial as well. We suspect that the job cost more than GSS’s estimate but they kept to their quote.

    We highly recommend GSS.

    The Strong’s, New Hampton, NH. Installation, August 2016

    1 person found this helpful
  • "More than satisfied with service "

    Reviewed Mar 16, 2017
    "More than satisfied with service "

    Reviewed Mar 16, 2017

    I contracted with GSS to install a roof- mounted 5.4 KW system in my house.
    At the beginning the company went out of their way to acquire and install a product that I wanted as opposed to their usual product.
    The installation went smoothly, professionally, and respectfully as if a military unit descended on my house and took over. It was impressive to observe. They even raked and spiffed up some flower beds that had been tussled up.
    The obtaining of permissions and final inspections went quickly and professionally - much much more than can be said about by city electrical inspector.
    10 months later the company representative even helped me with understanding the Federal Tax forms related to getting my Energy Credits reimbursement.
    Wish all my contractor related project went as successfully. Highly recommended.

    1 person found this helpful
Show All

Get a custom solar estimate for your home

Get a custom solar estimate for your home

Based on your roof and actual offers in your area

Try Solar Calculator

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.

  • Installation
  • Financing
  • General Contracting
  • Solar Repair & Maintenance
  • High Efficiency Hot Water
  • High Efficiency HVAC
  • Solar PV

... Loading panels

... Loading inverters

... Loading storage products

Associated product manufacturers

Associated financing companies

Get a custom solar estimate for your home

Get a custom solar estimate for your home

Based on your roof and actual offers in your area

Try Solar Calculator



Granite State Solar Headquarters

57 Ryan Rd
Bow, New Hampshire
03304 United States

Workmanship Warranty

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


New Hampshire Sustainable Energy Association, NH Clean Tech Council


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.

States served by Granite State Solar

  • New Hampshire NH ,
  • Vermont VT