603 Solar

Verified profile
Updated: 03 November 2022

Installing solar since 2018

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4.61 from 26 Reviews

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603 Solar reviews

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Breakdown of consumer reviews

Sales Process


Price as quoted


On schedule


Installation quality


After sales support


Latest good review thumbs up

Rich Engler | Litchfield, New Hampshire | 01/06/2023

Easy and smooth experience

From the start of my time working with 603 Solar, Zach and the team were extremely knowledgeable, transparent, and prompt! Zach answered all of my questions that I first had during our initial phone conversation in June. At the time, the Federal credit was going to be reduced from 26% to 22%. Understanding that greater than 6 months was an unreasonable leadtime, Zach assured me that if my project was not completed before 12/31/2022, 603 Solar would have given me the additional 4% credit I would have lost. We also ran into a few slight hiccups with my town building inspector, but Zach kept me in the loop every step of the way and was able to come to a resolution to keep our project moving forward. I would highly recommend Zach and 603 Solar for your project!

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Winton | Stratham, New Hampshire | 11/03/2022

603 Solar is an excellent company to do business with.

I had read reviews for 603 Solar and that is one of the reasons I went with them. I am extremely pleased with my experience dealing with Zach, Tyler and everyone from 603 Solar. They are very responsive, knowledgeable and professional. I highly recommend them.

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NewEnglander | Loudon, New Hampshire | 10/31/2022

Amazing company

We used 603 for our PV system. Zach and his crew were great to work with. Though, some supply issues which everyone is facing did push the project back it was worth it. He installers and design team were just great at answering all of our questions no matter what. We spoke to two other companies locally who also have great reps but 603 came in right on our budget and were honestly upfront the entire time about any delays.

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Paul St Laurent Jr | Rochester, New Hampshire | 06/26/2022

Up and running and running and running

I learned a lot from Scot, and it was a lot of fun He gave me the details and let me make up my mind. I did and ordered a 10 panel system. Well as more information came in, I saw that I really wanted to do more than I originally thought so I changed the order in coordination with Scot's input to a 28 panel system. We had some issues with changing city regulation and Erin made the changes that worked as well as submitting all that paperwork with Eversource and the State for the rebate. I continue to talk to Scot, getting suggestions for my house in Florida which will be getting panels in August. The solar panel system has been running since late November and I am happy, happy and really glad I was able to upgrade to a 28 panel system. 603-Solar and it's people were and continue to be fun to work with and I highly recommend them to meet all your solar panel system needs.

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D. Stahlin | Francestown, New Hampshire | 02/05/2022

Great Customer Service

We're very pleased with our roof-mount solar array from 603 Solar. Their team was easy to communicate with throughout all stages of the project. When upgraded panels came onto the market, they updated the original layout design to best fit our roof and maximize wattage. 603 followed up after the install, ensuring that everything was in good working order and that we had access to the system monitoring app. Sean, Erin, and Zach were courteous and professional throughout. Highly recommend.

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jbeliveau | Litchfield, New Hampshire | 01/24/2022

Extremely happy with the performance or 603 Solar

We are delighted with our experience with 603 Solar throughout the process. In December 2021, 603 Solar completed the installation of our 10kWa Solar array, made up of 25 400W panels. If you are considering solar for your home, we highly recommend the team at 603 Solar.

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Moon | Randolph, NH | 11/12/2021

Great experience

We looked into multiple companies for our Solar install and decided on 603 Solar as they were very attentive to our inquiries, honest with their answers and seemed very easy to work with. Everyone who was involved with our project from 603 Solar was great to work with. Great communication throughout the entire process. We would highly recommend choosing 603 Solar for your own project.

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Sajay Arthanat | Lee, NH | 10/29/2021

Wonderful experience!

Great company to work with! Highly professional and reliable. We installed our solar panels recently. Sean and his team did a detailed estimation of our power consumption and came up with a plan that would work best for us through the year without paying for electricity. Installation was efficient and completed as promised. I highly recommend 603 Solar if you are considering one for your home.

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Dana | Rumney, New Hampshire | 09/21/2021

Great company

Had 603 install 36 panel ground mount solar system summer 2021. The price was very competitive and the representative friendly and knowledgeable. The installer is subcontracted but works almost solely for 603. The work was done efficiently without any mess. I would definitely recommend that you talk with them if you are considering solar.

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ebsolar60 | Nashua, New Hampshire | 09/15/2021

Very pleased with Solar Install

Had 603 Solar install a solar array on my roof. During the process they were very helpful at answering questions and addressing my concerns. Installation went smoothly and electrical work was very well done. Very pleased with the end result.

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Chaput | Winchester, New Hampshire | 09/03/2021

Great People For Solar Install! You won’t regret using them!

My husband and I began our project with 603 Solar around fall of 2020. They are great to deal with. I found them to always be ready to explain anything and solve any issues. Our original sales person moved on over the winter; we got a call from the owner in the Spring letting us know this and making sure he had all the details of our project correct. They used Adams Electric to install our system. These guys were great also. They ran into much, much ledge on our property and our couple day project turned into like four days. They never got frustrated and never gave up. Also, we lost our internet connection with our solar system due to router range after it had been up and running for a couple months; 603 Solar came out and installed an extender solving the problem. They always answers my emails and texts with any questions or problems. I would definitely recommend them to anyone for a Solar Install. Our system has been installed and running since May 2021 and it has been great! I would say to anyone looking for a Solar Installer; 603 Solar will do you right.

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Service types

Residential solar - Grid tied

Commercial solar - Grid tied

Residential solar - Hybrid solar systems

Energy monitoring

About 603 Solar

603 Solar helps homeowners understand what their needs are and how much solar production they will need to offset their electric bill. We help calculate how much solar you will need, design exactly how the system will layout, and handle all the applications and permits required to approve a solar installation. Once approved we coordinate the installation and inspection of the system, and once it has been approved the system is ready to start collecting energy for you!

Office locations


New Hampshire - Stratham

152 Portsmouth Avenue, Stratham NH, 03885

New Hampshire - Exeter

24 Charter St, Exeter NH, 03833

New Hampshire - Stratham

152 Portsmouth Ave, Stratham NH, 03885

Contact 603 Solar

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Head Office
152 Portsmouth Avenue, Stratham NH, 03885
603 Solar