15 Best Solar Companies in Portsmouth, NH (2025 Reviews)
We analyzed over 1500 solar companies in the nation,
and have selected the top 15 in Portsmouth based on:
Customer review scores
Service area for Portsmouth, NH
Company policies and services offered
Accreditations and certifications
Please enter a valid 5-digit zip code!
Average Portsmouth homeowner saves $1,660/year with solar panels
Why you can trust EcoWatch
Best Solar Companies in Portsmouth
Finding the right solar panel installation company for your roof is a big decision, but it's one that can reap a lot of rewards in Portsmouth. What's especially making many homeowners consider installing solar panels is their high energy bills that keep increasing each year.
As you set out on your search for the best solar companies in Portsmouth, you might notice that there are a large number of providers to choose from. So, we’ve accumulated an expertly curated list of the top solar companies in the area.To get an idea of how much you would have to pay to install solar panels on your roof, you can get a free, no-obligation quote from one of the top solar companies in Portsmouth by clicking the "get quote" button below.
Best for Leasing
Sunrun
- Expansive service area
- Many financing options
- Some reported issues with customer service
- Some reported issues with door-to-door sales
EcoWatch Rankings for Solar Companies in Portsmouth

SunPower by BlueSel Home Solar
Clear Pricing Policy
Informative Resources
Reliable Customer Support
Limited information available on website
Services Offered
Cleaning and Maintenance
Panel Installation
Permit Assistance

ReVision Energy
Reliable Customer Support
Free Quotes
Clear Pricing Policy
Informative Resources
Limited information available on website
Services Offered
Panel Installation
Financing Assistance
Consultation
Community Solar Projects
Battery Storage
Cleaning and Maintenance


Helios Solar Energy
Free Quotes
Prompt Service Delivery
Reliable Customer Support
Clear Pricing Policy
Limited information available on website
Services Offered
Panel Installation
Cleaning and Maintenance
Consultation
Financing Assistance
Permit Assistance



Granite State Solar
Informative Resources
Reliable Customer Support
Clear Pricing Policy
Limited information available on website
Services Offered
Panel Installation
Financing Assistance
Battery Storage

Sundial Solar
Informative Resources
Free Quotes
Clear Pricing Policy
Limited information available on website
Services Offered
Permit Assistance
Battery Storage
Consultation
Panel Installation
Tesla Powerwall
Financing Assistance

Future Energy Solar
Informative Resources
Free Quotes
Reliable Customer Support
Prompt Service Delivery
Limited information available on website
Services Offered
Panel Installation
Permit Assistance
Financing Assistance



Maine Solar Solutions
Clear Pricing Policy
Reliable Customer Support
Free Quotes
Informative Resources
Limited information available on website
Services Offered
Tesla Powerwall
Grid-Tied Solar System
Financing Assistance
Consultation
Permit Assistance
Off-Grid Solar Systems
Community Solar Projects
Panel Installation
Battery Storage

EnergySage
Clear Pricing Policy
Free Quotes
Informative Resources
Limited information available on website
Services Offered
Battery Storage
Community Solar Projects
Tesla Powerwall
Panel Installation
Financing Assistance

altE Store
Free Quotes
Clear Pricing Policy
Informative Resources
Limited information available on website
Services Offered
Cleaning and Maintenance
Battery Storage
Grid-Tied Solar System
Off-Grid Solar Systems
Panel Installation

Boston Solar
Informative Resources
Prompt Service Delivery
Free Quotes
Reliable Customer Support
Limited information available on website
Services Offered
Consultation
Financing Assistance
Battery Storage
Panel Installation
Methodology: How We Ranked the Best Solar Companies in Portsmouth
EcoWatch's solar experts analyzed each solar company in Portsmouth based on criteria such as its reputation in the industry, customer reviews, services, warranty coverage and financing. Using this solar methodology, we used the data we collected to rate and rank each company and narrow down our picks for the best solar companies in Portsmouth
Below are some the criteria we examined specifically for New Hampshire solar companies
- Brand reputation and certifications (20%): We take each company's Better Business Bureau (BBB) score into consideration, as well as how long the installer has been in business (at least 5 years is required, 10 preferred) and what type of solar certifications it holds.
- Customer reviews (20%): Trust is a top priority at EcoWatch, so we take customer experience under close consideration. We scour different review sites and customer testimonials when ranking our top solar companies, checking sites such as Trustpilot and Google Reviews. We also consider any potential complaints or lawsuits filed against these companies and award or remove points accordingly.
- Warranty (20%): A company earns a perfect score in this category if it offers 25-year warranties that cover performance, product and workmanship. The industry standard that we measure companies against is 25-year product and performance warranties, along with a 10-year workmanship warranty. We also look closely into the track record of the post-installation support each company provides in terms of honoring its contracts
- Solar services (10%): All of the companies we review install solar panels, but we award companies higher points if they offer additional services for customers, like battery installation, energy-efficiency audits, and EV chargers.
- Pricing and financing (10%): It's hard to get exact quotes for solar projects, but we use marketplace research to determine how each company prices its equipment and installation services. Additionally, companies that offer more help for panel financing — like in-house loans, leases, or PPAs — score higher than those that don't.
- Availability (10%): The bigger the service area, the higher the company will score.
- Transparency and accessibility (5%): Solar installers that offer free consultations and easy contact methods score higher in this category.
- Environmental, social and corporate governance factors (5%): A company earns a perfect score in this category if it offers public data disclosure, addresses end-of-life (EOL) products or processes, and demonstrates a commitment to uplifting the communities that it serves.
The Cost and Benefits of Solar in Portsmouth
Solar panels run off a free energy source — the sun — but before you can take advantage of this you will need to pay to install your system.A few main factors that determine the cost of installing solar panels on your home and how much it could save you over time are:
- Average daily sunlight: Since Portsmouth gets a decent amount of average daily sunlight, your solar panels can generally produce enough energy to power your whole home, which affects how much your electricity bills will be.
- Incentives: Those who install a solar system this year can save 0 of their overall solar costs by taking advantage of the federal solar investment tax credit. You can also save about $20,000 on your utility bills over 20 years not including incentives.
- Choice of solar panels: The type of solar panels you get will affect your total cost. High-efficiency monocrystalline panels are more expensive upfront but can also lead to more savings over the lifetime of your system. If you don’t need to maximize efficiency, you can opt for a higher number of more affordable panels.
- Your energy consumption: If your family needs to use a lot of energy, you'll reap more rewards from installing solar panels.
Thanks to solar panels now being cheaper than ever as well as local and federal solar incentives, they are a worthwhile investment for the majority of homeowners.
Solar Savings Calculator for {{ solarcalc.name }}
Use the calculator below to get a sense of how much switching to solar could impact the environment and your wallet. You can also view our solar panel cost guide for Portsmouth, NH.
{{ solarcalc.time_period|number:0 }} -year savings | {{ solarcalc.total_savings()|currency }} |
Estimated cost | {{ solarcalc.array_cost() | currency }} |
Estimated incentives | {{ solarcalc.incentive_savings() | currency }} |
Payback period | {{ solarcalc.payback_period()|number:1 }} years |
CO2 emissions prevented | {{ solarcalc.CO2_total()|number:0 }} lbs |
Miles driven equivalent | {{ solarcalc.CO2_total()/0.78|number:0 }} mi |
Switching to solar in {{ solarcalc.name }} can save you {{ solarcalc.total_savings() | currency }} over the course of {{ solarcalc.time_period|number:0 }} years.
Solar Incentives in Portsmouth
One of the benefits of installing a solar panel system is receiving government incentives.On top of the federal tax credit incentive, there are also some local incentives, which in most cases, can be claimed in addition to the federal incentive, so you can save even more. Take a look at our article on solar incentives to learn what incentives you can benefit from.
Environmental Impact of Switching to Solar in Portsmouth
If you’re thinking of adding solar panels to your home, one of the primary reasons why may be to reduce your carbon footprint.A question many might have in mind is how much can they really help protect the environment by going solar anyway? Something that can severely affect your carbon footprint is how long your commute is and how much you drive overall. If you go solar and drive an electric car, you can significantly decrease your carbon dioxide emissions by charging your car at home.After you go solar, your carbon dioxide emissions can be lowered by about 40 pounds a year. As you can see, investing in solar has so many other benefits outside of saving money. One of the major ones is that you can help save the Earth too.
Best for Leasing
Sunrun
- Expansive service area
- Many financing options
- Some reported issues with customer service
- Some reported issues with door-to-door sales
EcoWatch's Portsmouth, NH Solar Company Rankings FAQs
What is the best solar panel installer in Portsmouth?
In Portsmouth, SunPower by BlueSel Home Solar is the most reputable local solar company. Our team of experts rates it 3.00 stars, so it's a good choice if you're looking to add solar panels to your home.
What are the best and worst things about solar power?
The biggest advantages of solar power are that it can lower or, for some, 100% erase your electricity bills, raise your home’s value and lower your carbon footprint. The main disadvantages are that solar panels can be costly to install, you may not see as many savings if you don’t use a lot of electricity and whether you can install solar panels depends on your roof configuration.
Are solar panels worth it?
Solar panels can be a good investment for many homeowners, but truthfully, they might not be worth it for everyone. If your home doesn't get a lot of direct sunlight or your power bills are already pretty low, solar panels might not be for you.
How much solar panel capacity do I need for my house?
Solar panel capacity is rated based on the amount of power they produce under standard testing conditions. Since each panel can generally produce about 250 to 400 watts per hour, the average home will need 20 to 35 panels.
Our goal is to reach as many people as we can with sensible solutions like solar energy. Our team of full-time local researchers collects solar price and installation data for every city in America then compiles it to create these digestible city guides. If you want to read our solar expert’s opinion on the top solar companies featured here, follow this link.
Company research was conducted by Melissa Smith and Karsten Neumeister. Local data analysis was conducted by James Savino. See something we missed or could do better? Email the editor.