The Leading New Hampshire Solar Contractors

Our Mission

Our mission is to educate people on the benefits of solar energy, to the best of our ability, and to assist home and business owners to receive the best return on investment for their solar array.

The New Hampshire Solar Authority

603 Solar is a solar energy service based in Exeter, NH. We wanted to begin a solar company structured on the values of integrity and honesty, providing an amazing customer experience and getting people the best return on investment. 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 homeowners the best return on investment. Call us today to see how solar can work for you!

– 603 Solar

Meet The Team

Sean Carlson


[email protected] | Phone: 603-978-2228

Zachary Haithcock


[email protected] | Phone: 603-582-6032

Erin Pierce

Operations Manager

[email protected] | Phone: 603-570-2607 Ext. 3

Marian Caisse

Office Administrator

[email protected] | Phone: 603-570-2607 Ext. 4

Steve Cavallaro

Solar Advisor

[email protected] | Phone: 978-505-0852

Joey Deluca

Solar Advisor

[email protected] | Phone: 603-833-5915

Jeff Cantara

Solar Advisor

[email protected] | Phone: 603-205-0566

Jonathan Speltz

Solar Advisor

[email protected] | Phone: 603-973-0239

Gabriel Richard

Site Surveyor

[email protected] | Phone: 339-933-0499

Our Process

Step 1: Site Evaluation

In order for us to give you the best service we possibly can, and maximize your Return on Investment (or ROI), we need to take a look at the property you are interested in putting solar on. We look at the roof structure and size, roof azimuth, main electric panel and any sub panels, shading concerns, and anything else that would affect the project. Then we take a look at your yearly electric usage and tell you exactly how many modules you will need to cover it, and what the best system would be to maximize your ROI.

Step 2: System Design

After we perform the sight evaluation and figure out exact how many modules you will need our PV Solar Designer will put together a to-scale model of your home and the solar array using CAD software, so you know exactly how the array will look. If you wish to change the layout of the system, simply explain how you would like it changed, and we’ll send another model reflecting the changes! Once you are happy with the design we will finalize it so it is ready to send off to the town and utility for permits and interconnection approval.

Step 3: Permit and Interconnection Approval

Once the design has been finalized, our team will fill out and submit all of the required paperwork for permit approval by your local AHJ and interconnection approval from your Utility company. Once both are approved we are ready to schedule and install the system.

Step 4: System Installation

Once the permit and interconnection applications have been approved by the town and utility, its time to schedule your installation and install your PV Solar array! We partner with professional, licensed, and insured Master Electrician’s who have overseen hundreds of installations and coordinate with them and you to figure out the best date to install your system.

Step 5: Inspection and Commissioning

After your solar installation has been completed, it will need to be inspected by your local AHJ to ensure that the system has been installed according to current building and electric codes. We will coordinate with you and the AHJ to find a time that works for all parties. Once the system has been inspected we will file the necessary paperwork with your utility company so they can come and switch your meter with a bi-directional meter that allows you to transfer energy to and from the grid. After the utility comes to swap out your meter, we will come and power the system on!

Step 6: System Monitoring

Once the system has been powered on and is operational we will set you up with the systems online monitoring program so you know exactly what your system is producing on any given, day month or year. With monitoring set up we can always see what your system is doing, and if an issue ever arises, we will know.

Need more details? Contact us.

We are here to assist. Contact us by phone, email or via our Social Media channels.