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5 Best Solar Companies in Maine (2024 Guide)

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Author Icon Written by Tamara Jude Updated 04/17/2024

Maine has slowly shifted its focus to solar energy growth over the last 26 years. The state’s Renewable Portfolio Standard (RPS) outlines gradual moves to more renewable energy sources, such as solar power. According to the Database of State Incentives for Renewables and Efficiency (DSIRE), Maine plans to run on 100% renewable energy by 2050 to help combat its rising, higher-than-average electricity costs. 

Our team spent nearly 60 hours researching leading solar installers on the national, regional, and local levels. Our guide details the best solar companies in Maine and offers advice on finding an installer that meets your home’s needs.

Compare Solar Installers in Maine

Company Star Rating Warranties Payment Options Link
4.8
25 years Full purchase, loan, lease, PPA GET QUOTE
4.2
25 years Full purchase, loan, lease GET QUOTE
4.6
N/A N/A GET QUOTE
4.2
N/A N/A GET QUOTE
4.2
N/A N/A GET QUOTE
No results were found.

Maine’s Top Solar Energy Companies

These are the best solar companies in Maine, according to our research and ranking methodology. 

SunPower: Best High-Efficiency System
Venture Solar: Best Northeast Regional Installer
Summit Energy: Best Regional Maine Installer
Maine Solar Solutions: Best Full-Service Maine Installer
Sundog Solar: Best Local Maine Installer

Our Top Picks for Solar Installers in Maine

SunPower

Best High-Efficiency System
4.8

Pros and Cons

Pros Custom-built systems with in-house components 25-year comprehensive coverage, plus output guarantee In-house solar storage and electric vehicle (EV) upgrades Cons Coverage varies by ZIP code within the state Higher-than-average pricing, according to some customer reviews No variety for panels, components, or batteries

Why We Chose SunPower

You should consider SunPower if you’re looking to invest in the highest-quality solar system available. The company uses Maxeon’s high-efficiency solar panels and custom, in-house solar components designed to work optimally together. SunPower also offers its exclusive SunVault battery storage and EV chargers.

The company provides 25-year warranty coverage, including a power performance guarantee. This warranty promises that your panels will still produce 92% of their outlined power production levels after 25 years.

Warranty and Financing

Warranty
SunPower provides a comprehensive 25-year warranty covering panels, system components, add-on upgrades, and workmanship. Coverage also includes a 25-year power output production guarantee.

Financing Options
✔ Full purchase
✔ Loan
✔ Lease
✔ Power purchase agreement (PPA)

Reputation and Awards

SunPower has developed advanced solar technology since 1985. The company was honored with PV Magazine’s 2019 Sustainability Award and Good Housekeeping’s 2022 Home Renovation Award in the Biggest Energy Savers category for its SunVault energy storage system.

SunPower is accredited by the BBB and has an A+ rating from the organization. When we analyzed customer reviews, we found that homeowners appreciated the excellent system performance, noting immediate energy savings. However, some complained about higher-than-average system pricing and delayed communication with third-party installers.

Learn more: SunPower Review

Venture Solar Best Northeast Regional Installer
4.2
Pros and Cons
Pros High-efficiency solar panels through SunPower System monitoring via smart devices and computer Two-month installation turnaround, per the company Cons Limited panel selection Phone number required for online quotes No solar battery options
Why We Chose Venture Solar

Venture Solar focuses on a smaller regional coverage area to provide a more personalized experience. As a SunPower dealer, the company offers high-efficiency solar panels with higher-than-average energy production. These all-black panels blend into most roof designs, providing a more inconspicuous rooftop installation. Additional protection includes critter guards to keep pests away from your system.

Venture completes its installation with in-house teams, leading to a quicker and cleaner process. The company uses drone footage for its roofing assessments for improved measurements. Venture Solar states its installations take one day to complete, with an average two-month timeframe from design to activation.

Warranty and Financing

Warranty

Venture Solar includes a 25-year bumper-to-bumper warranty covering service, parts, and power output.

Financing Options

✔ Full purchase
✔ Loan
✔ Lease

Reputation and Awards

The company maintains an A+ rating with the BBB but is not accredited. Customers praised Venture Solar for its courteous and knowledgeable sales team, but some cited cases of numerous failed inspections due to project issues.

Summit Energy Best Regional Maine Installer
4.6
Pros and Cons
Pros 30-year warranty coverage for parts, labor, and roof penetrations Rooftop solar and three ground-mount panel configurations System monitoring included with each project Cons Company is less than 10 years old Limited service personnel options, per customer reviews Unclear details about linear performance coverage
Why We Chose Summit Energy

Summit Energy offers one of the longest system protection plans available, offering peace of mind for Maine residents. The company partners with several leading panel manufacturers, such as Canadian Solar, REC, and Trina Solar. Summit Energy offers multiple panel configurations, such as rooftop, ground-mount, pole-mount, and SmartFlower solar installations. 

Each system includes 30 years of system monitoring through the company’s dedicated app. Additional benefits include transferable system ownership, warranty coverage, and a simplified online claims process. 

Warranty and Financing

Warranty

Summit Energy includes 30 years of coverage for parts, labor, roof leaks, and system monitoring. 

Financing Options
✔ Full purchase
✔ Loan
✔ PPAs

Reputation and Awards

Summit Energy has an A+ rating from the BBB and is accredited by the organization. While reading customer reviews, we learned that homeowners liked the company’s quick installation process and knowledgeable employees but noted no system servicing support. 

Maine Solar Solutions Best Full-Service Maine Installer
4.2
Pros and Cons
Pros Community solar assistance and installations Grid-tied and off-grid solar installations Service discount for active and retired military personnel Cons Only one battery option offered Smaller product catalog than other local installers Workmanship warranty falls below the industry average
Why We Chose Maine Solar Solutions

Maine Solar Solutions provides a one-stop shop for solar customers, offering several installation options to meet your needs. The company specializes in grid-tied and off-grid projects, allowing residents to choose their preferred level of energy independence. If solar panels won’t work for your home, the company provides alternative community solar assistance and activation to help you save with solar energy. 

Additional upgrades include Level 2 electric vehicle (EV) charging stations and Tesla Powerwall solar batteries. Although the company no longer installs heat pumps, it partners with local installers to help customers upgrade their HVAC systems.

Warranty and Financing

Warranty

Maine Solar Solutions protects its systems with a 25-year manufacturer and 10-year workmanship warranty. 

Financing Options
✔ Full purchase
✔ Loan

Reputation and Awards

Maine Solar Solutions holds certifications from the North American Board of Certified Energy Practitioners (NABCEP) and Efficiency Maine. The company was Maine’s first Tesla solar panel installer and is one of the few certified Powerwall installers in the state. 

Maine Solar Solutions carries an A+ rating from the BBB but is not accredited. The company received mainly 5-star reviews across multiple review sites. Customers liked the company’s seamless installation process, transparency, and efficient custom solar projects.

Sundog Solar Best Local Maine Installer
4.2
Pros and Cons
Pros Large selections of solar panels, inverters, and batteries Family-owned and operated business Rooftop solar and off-grid installations available Cons Short five-year workmanship warranty Limited solar financing options Manufacturer coverage varies by solar panel
Why We Chose Sundog Solar

Sundog Solar is a great choice for customers seeking the best customization options. The company offers an extensive product catalog of leading solar brands, such as REC, Q Cells, Solaria, and Tesla. Sundog Solar offers inverters from Enphase, SMA Solar, and SolarEdge, among others. Homeowners can pair rooftop or off-grid installations with solar batteries from Tesla, Sonnen, LG, and other top manufacturers. 

Sundog Solar uses an in-house team of NABCEP-certified installers and licensed electricians for each project. The company is a certified Efficiency Maine Qualified Contractor and offers additional energy efficiency upgrades, such as heat pumps and solar water heaters.

Warranty and Financing

Warranty

Sundog Solar offers a 25-year performance warranty plus five years of workmanship coverage. Equipment warranties come with the solar panels but vary based on the manufacturer. 

Financing Options
✔ Full purchase
✔ Loan
✔ PPAs

Reputation and Awards

Sundog Solar holds an A+ rating with the BBB but is not accredited. When analyzing customer reviews, we noted that residents appreciated the high-quality equipment and overall professionalism but mentioned issues with contacting the company after installation. 


What Are the Available Solar Incentives in Maine?

Although Maine has an ambitious renewable energy goal, the state offers limited incentives to make conversion more affordable. Still, homeowners can save on their solar panel installation costs with the following programs.

The federal solar tax credit provides up to 30% off installation costs to residents who legally own their systems. This incentive isn’t paid out as a cash refund but instead helps reduce or eliminate your federal taxes. You can apply the credit to photovoltaic (PV) panel systems, solar shingles and roofing, and stand-alone energy storage. Additional equipment, such as racking systems, wiring, and other components, also qualifies.

Installing a solar system typically increases your home value and property tax, but Maine’s Solar and Wind Energy Property Tax Exemption eliminates these additional taxes. No additional application is required for this benefit. It automatically applies. 

The Maine Public Utilities Commission (PUC) provides a statewide net-metering program known as the Net Energy Billing kWh Credit Program. It gives customers utility bill credits for sending excess energy their systems generate back to the power grid. These credits accumulate on each customer’s account and help reduce annual energy costs. 

The Maine PUC mandates that customers receive the full retail electricity rate for all payouts. This means that you’ll receive an energy bill credit equal to the original price of electricity. This is the best payout rate for net-metering programs and offers the best savings to customers. We recommend working with your solar installer and utility company to ensure program eligibility and interconnection requirements. 

Maine will continue to introduce solar incentives as it pursues its 100% renewable energy goal. We recommend checking DSIRE for complete details on current and future solar incentives.


When considering a solar installation company, compare the following key features to find the best provider for your needs. 

Solar Services

Considers solar panel companies that use in-house installers for their projects. These companies maintain a higher installation quality and have direct customer communication. Some installers use third-party contracts for solar projects involving various local installers. Maintaining installation quality with each remote team is hard, which could lead to improper installations. In addition, you’ll have a separate solar company contact which could complicate communication. We recommend using solar providers with in-house installation teams. 

Additional solar services include system monitoring and dedicated apps that provide insight into panel performance. The software details system health, average energy use, and panel or system problems. These services may be free or require additional subscription fees. Some solar providers include energy efficiency audits before an installation to find any energy leaks or issues. This service helps improve your home’s overall efficiency, resulting in better energy savings and solar system performance.

Warranties and Power Production Guarantees

Your solar panel system should include manufacturer and workmanship warranties. The manufacturer (or product) warranty covers your system for manufacturing defects or issues. With workmanship coverage, you have protection against installation-related issues. Our research found that top-performing solar panels include manufacturer coverage for 25 years or longer. This coverage length aligns with the average solar panel life span. Workmanship coverage varies between installers, though the industry standard is 15 years. Having product and workmanship match the estimated panel life span is ideal. 

Some solar companies include power production guarantees to outline expected panel performance. Over time, solar panels lose their efficiency by as much as 0.5% per year. Installers include these policies to guarantee solar electric production to account for this gradual panel degradation. Most providers will repair or upgrade your panels if they fall below these production levels. In rare instances, the installer will provide monetary compensation for failed production levels. Coverage varies between installers but may last as little as two years and up to 30 years. We recommend selecting solar systems with long-term production guarantees.

Payment Options

We recommend up-front cash payments or solar loans to maximize your solar investment. Both solar financing options offer the best return on investment (ROI) and make you the legal system owner. Most solar incentives and rebates require legal ownership as a qualification. Other payment options, such as solar leases and power purchase agreements (PPAs), keep panel ownership with the solar provider. This disqualifies you from additional cost savings and offers little long-term financial benefit. We don’t recommend these payment options unless you’re not interested in panel ownership.

Customer Support

Solar companies should offer two or more contact options for customer support. Most companies offer phone, email, or online forms. Additional options include in-app messaging, SMS, or online chat. When our team tested online chats, we got mixed results. Some chats connected to a live rep, while others used automated responses. We also recommend checking customer reviews for mentions of customer support issues. During our company research, we noticed recurring issues, such as unreturned phone calls, delayed responses, or unhelpful representatives.


How To Get a Solar Quote in Maine

We’ve provided the below guide on a typical solar quote and what to expect when meeting with a solar company. We recommend getting multiple free quotes from solar installers to compare products, pricing, and warranties. 

  1. Contact the solar installer: Check each company’s website for information on starting a quote. Many companies offer online forms, phone numbers, or online calculators to start the process. When we contacted companies by phone, we spoke with two separate employees. The first rep usually verifies your solar eligibility and coverage area. The second rep is from the sales department and will provide further service details.
  2. Set up a solar consultation: You’ll choose a date for your formal consultation. Many companies offer in-person or virtual options. Choose the method that works best for you. We do recommend checking the video call system requirements to ensure no technical issues occur during the meeting. 
  3. Have your energy bills ready: You’ll need your most recent energy bill for your consultation. Companies use your bill to determine your average energy needs and build a system to support your home. The company should advise how many months of bills it requires. If they don’t, we recommend having your last three months of bills ready.
  4. Assess your roof space: During your consultation, the sales rep will evaluate your home’s roof and check for available space, design issues, or structural damage. This evaluation helps determine your solar array size and ideal positioning. The rep will also check for nearby objects and trees that could impact panel performance. Because solar panels need sunlight to work, your panels need direct sun access. If your property includes too many tall trees, the rep may recommend tree removal before installation can occur. 
  5. Create your solar system: The solar company will design your system after completing their initial evaluations. Most companies allow you to customize your solar panel system based on your preferred solar panel type, brand, and size. Your panel choice will impact your system size and rooftop solar installation. High-end solar panels produce more energy, and require less roof space, but have the highest price tag. Cheaper solar panels are more affordable but generate less power and require more panels. Additional system components include solar batteries and electric vehicle (EV) chargers. 
  6. Review the final quote: You’ll receive a final, itemized quote for your solar power system. Your queue should include all solar panel costs, component pricing, labor charges, and warranty details. You’ll also receive details on financing options and your estimated payback period or the amount of time it takes for your system to pay for itself. Some companies may include details for available solar incentives and assist with the applications. Compare your complete quotes before deciding on a solar company.

Our Conclusion

We selected SunPower as the top Maine solar company due to its high-efficiency solar systems and 25 years of comprehensive coverage. Although some customer reviews mention higher costs than other providers, you’ll invest in better quality equipment built to last for decades. The added power performance guarantee ensures your system continues performing at outlined capacities through its life span. 

We recommend getting at least three quotes before committing to a provider. Review each installer’s product selection, pricing, financing options, and warranty coverage.

Other Maine Home Service Resources


FAQ About Solar Companies in Maine

Are solar panels worth it in ME?

Yes, installing solar is worth it in Maine due to the above-average electricity rates and the state’s ambitious clean energy goals. Moving to cheaper solar energy will help reduce your electricity costs and support Maine’s pursuit of 100% clean energy generation by 2050.  

Can you sell electricity back to the grid in ME?

Yes, you can sell electricity back to the Maine grid through the state’s net-energy billing (or net-metering) program. Homeowners receive electricity bill credits at the retail electricity rate, making this a favorable program. Contact your utility company for more details on net-energy billing. 

Does Maine offer a state solar tax credit?

No, Maine does not currently have a state solar tax credit. However, you can use the federal solar credit for 30% off installation costs. The credit applies to your federal tax liability and may help eliminate them. 

What is the average electricity rate in Maine?

According to the U.S. Energy Information Administration, the average cost of Maine electricity was 29 cents per kilowatt-hour (kWh) in March 2023. The state has the third-highest electricity rate in the New England region, behind Connecticut and Massachusetts.  This rate is nearly twice the country’s 15-cent average. 


Our Rating Methodology

We are committed to providing comprehensive and unbiased reviews to our readers. After over a thousand hours of research on solar companies, interviews with experts, and common customer needs, we’ve created a detailed rating system for solar providers based on six factors:

  • Solar equipment, installation, and services (25%)
  • Warranty and performance guarantees (25%)
  • Brand reputation and certifications (15%)
  • Financing options (15%)
  • Experience (10%)
  • Availability (10%)

Total scores are divided by 20 for a final 5-point rating scale.

To share feedback or ask a question about this article, send a note to our Reviews team at reviews@thisoldhousereviews.com.