Years in business

> 3


Review score is above industry average of 3.97



NABCEP qualified installer


Solar panel cost calculator

Latest 603 Solar reviews

Latest review

Rachel F over 1 month

603 Solar was an amazing company to work with. They were personable, knowledgable and willing to answer the many questions that I had throughout the whole process. We are extremely happy with our panels and would recommend 603 Solar to anyone interested in taking the solar plunge!

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All 603 Solar reviews

603 Solar prices

This installer does not publish their standard system prices on the net.

As such we have used average pricing from the installers service areas as a proxy for what this company would most likely charge for a solar system.

System size


Average cost per watt


Net cost of system

$15,648 - $19,126

Average payback time

Annual power production

12,084 kWh

Levelized cost of solar energy

Levelized cost per kWh is the cost of the solar system divided by the total number of kWh produced by a solar system over it’s lifetime.

6¢ kWh

If you don't get solar

29¢ kWh

Forecast average NH electric rates over the next 25 years

Installers description for their business

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!



152 Portsmouth Avenue, Stratham NH, 03885


(click to reveal) ..2607


603 Solar

Office locations

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152 Portsmouth Avenue, Stratham NH, 03885

Service locations

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Accreditations and affiliations

Top 100 Solar Installers of 2020

Service Types

Residential solar - Grid tied

Small commercial solar - Grid tied

Residential solar - Hybrid solar systems

Energy monitoring

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