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5 Best solar companies in Maine (2022 ranking)

UPDATED NOVEMBER 2022

There are plenty of solar companies out there – check out this updated ranking for the top rated solar installers in Maine based on shopper preferences. Compare customer ratings, company tiers, and genuine customer feedback to see which installer is the best fit for your solar project.

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Why you can trust EnergySage

The data on this page comes from real solar quotes to real solar shoppers on the EnergySage Marketplace. We give you access to transparent information so you can confidently make informed energy decisions. Learn more about how our Marketplace works and how we make money.

6 companies
173 customer reviews
5.0 average rating

Solar companies in Maine 2022

  • Multi-state
    Established 2015
    Elite Installer
    ACE develops, finances, builds, and operates residential, commercial and utility-scale solar PV projects. ACE has developed and/or built over 300 MW of solar PV projects across the US. We succeed by listening to our partners and clients, offering flexible, innovative solutions tailored to their needs, and driving the project to successf…
    Elite EnergySage badge

    Elite Installer

    Screened & Verified

    ACE develops, finances, builds, and operates residential, commercial and utility-scale solar PV projects. ACE has developed and/or built over 300 MW of solar PV projects across the US. We succeed by listening to our partners and clients, offering flexible, innovative solutions tailored to their needs, and driving the project to successf…
  • Multi-state
    Established 2010
    Elite Installer
    NuWatt Energy is a full-service Solar Power, Heat Pump AC, and Energy Efficiency/Control installation company. We offer free home and business solar energy quotes as well as solar system financing, design, engineering, permitting, installation, rebate acquisition, maintenance, and monitoring – all based on your energy goals and budget. …
    Elite EnergySage badge

    Elite Installer

    Screened & Verified

    NuWatt Energy is a full-service Solar Power, Heat Pump AC, and Energy Efficiency/Control installation company. We offer free home and business solar energy quotes as well as solar system financing, design, engineering, permitting, installation, rebate acquisition, maintenance, and monitoring – all based on your energy goals and budget. …
  • Topsham, ME
    Established 2018
    Advanced Installer
    All Solar Energy Solutions, LLC offers the best technology, design and craftsmanship accomplished by a knowledgeable and experienced team. We provide comprehensive solar panel consultation, design, engineering and installation services for residential and commercial applications in Maine. Throughout the process, we pledge to provide the …
    Advanced EnergySage badge

    Advanced Installer

    Screened & Verified

    All Solar Energy Solutions, LLC offers the best technology, design and craftsmanship accomplished by a knowledgeable and experienced team. We provide comprehensive solar panel consultation, design, engineering and installation services for residential and commercial applications in Maine. Throughout the process, we pledge to provide the …
  • Durham, ME
    Established 2012
    Advanced Installer
    Maine Solar Solutions is committed to customer satisfaction. Satisfaction is achieved by installing high-quality equipment, following the highest standard of workmanship, maintaining clear communication from initial contact through project completion and after.
    Advanced EnergySage badge

    Advanced Installer

    Screened & Verified

    Maine Solar Solutions is committed to customer satisfaction. Satisfaction is achieved by installing high-quality equipment, following the highest standard of workmanship, maintaining clear communication from initial contact through project completion and after.
  • Multi-state
    Established 2015
    Advanced Installer
    DeFreitas Enterprises, LLC is a family owned and operated solar installation company based in Chelmsford, MA. We have been installing for companies and customers since 2014 & have a 5 star rating for customer satisfaction. We communicate with previous customers and work incredibly well with the New England Market.
    Advanced EnergySage badge

    Advanced Installer

    Screened & Verified

    DeFreitas Enterprises, LLC is a family owned and operated solar installation company based in Chelmsford, MA. We have been installing for companies and customers since 2014 & have a 5 star rating for customer satisfaction. We communicate with previous customers and work incredibly well with the New England Market.
  • Multi-state
    Established 2011
    Approved Installer
    Invaleon Solar is a residential and commercial solar developer and installer in the state of Massachusetts. We come from a background of engineers, tradesmen, and financial planners. We have been in business since the start of the solar boom in MA, and our core values have carried us throughout the years. We believe that every home and b…
    Approved EnergySage badge

    Approved Installer

    Screened & Verified

    Invaleon Solar is a residential and commercial solar developer and installer in the state of Massachusetts. We come from a background of engineers, tradesmen, and financial planners. We have been in business since the start of the solar boom in MA, and our core values have carried us throughout the years. We believe that every home and b…

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How we determine the best solar companies in Maine

At EnergySage, we care about connecting solar shoppers to high-quality solar companies. As such, any solar installers we list above are active on the EnergySage Marketplace in Maine and are pre-screened by our team.

What does it mean to be “pre-screened”? We evaluate every solar installer to ensure that they’ll provide quality service to EnergySage users. These high-quality installers are approved based on their years of experience, licensing and insurance, reputation, and certifications. When bringing new installers into the EnergySage Marketplace, here’s how we ensure our partners are the best of the best:

  • At least three years of experience installing solar
  • Licensed and insured for solar installations
  • NABCEP certified
  • Reputation for excellent customer service and quality solar installations
  • Installs high quality solar equipment

Our rating tiers

Choosing the right installer can be difficult, especially when you’re deciding between multiple top-notch companies on EnergySage. To make it easier, we created a unique rating system that evaluates our partners’ performance based on real data from our Marketplace.

Elite+ installers are the most experienced, chosen, and celebrated companies on the Marketplace, having provided exceptional service to a high volume of shoppers for at least a year.

Elite installers earn top ratings from customers, endorsements from vendors, and win customers more frequently than their peers.

Advanced installers are among the top half of companies on the Marketplace for responsiveness, reputation, results.

Approved installers passed our rigorous screening criteria for experience, licensing, and positive reviews.

How to pick the best solar installer

When you’ve already narrowed down your options to reputable installers and are trying to decide which quote to move forward with, here are three final considerations that distinguish the best from the rest:

workmanship warranties for solar panels

Workmanship warranties

What is covered and for how long?

In the unlikely event there’s an issue with your solar panel system, it’s important to know who to call if something goes wrong. There are multiple warranties that come with your solar energy system, from manufacturer warranties for different components to workmanship warranties from your installer.

The workmanship warranty is specific to the work the installer performs, and is typically somewhere between one and 10 years. Be sure to check with your installer to see what’s included in the warranty, if there are any exclusions, and if there’s any cost to you in the event they have to come out and check on or replace some equipment.

house with solar installers and solar panels

The use of sub-contractors

Which crew will install your system?

In some instances, solar installers will rely on subcontractors to perform some, or all, of the work included during your solar installation. Don’t let this put you off: it’s entirely standard procedure in the industry. What is alarming, though, is a lack of transparency from installers about who will install your system and why they use subcontractors.

When you’ve narrowed down your list of potential solar installers, be sure to ask who will install the system–their own crew or subcontractors–and, if they use subs, ask why they do, what portion of the install the subcontractors will complete, and what oversight the company you purchase your system from has over the subcontractors. At the end of the day, the most important question is who will stand behind the quality of your installation.

solar company reviews on a computer

Expertise

How does each installer tailor their system to your needs?

Beyond ensuring that your solar installer has all of the appropriate licenses and industry-specific certifications, it’s important to work with a solar installer who has experience custom designing systems to fit their customers’ needs.

When you’re comparing your options, the best installers will work with you to understand your needs, as well as how solar fits your overall energy plans. Make sure your solar installer provides a consultative, professional solar experience.

By doing the legwork for you, EnergySage makes it easy to find reputable solar installation companies in Maine. We’ve already vetted all of our installer partners, and keep a close watch over their performance to ensure their installations and customer satisfaction are up to the levels that you–and we–expect. Start receiving quotes from reputable installers in your area by creating a free account on the EnergySage Marketplace today.

As of November 2022, the average solar panel cost in Maine is $3.33/W. Given a solar panel system size of 5 kilowatts (kW), an average solar installation in Maine ranges in cost from $14,152 to $19,148, with the average gross price for solar in Maine coming in at $16,650. After accounting for the 30% federal investment tax credit (ITC) and other state and local solar incentives, the net price you'll pay for solar can fall by thousands of dollars.

According to solar shoppers on the EnergySage Marketplace, the top five solar installers in Maine are:

There are 6 solar companies in Maine on the EnergySage Marketplace.
On average, solar shoppers in Maine save $20,215 over the course of 20 years. Shoppers who connect with a solar installer in Maine on the EnergySage Marketplace have a solar payback period of 12.05 years.