Cost of Solar Panels Maine | Cost of Solar Panels Portland Maine




The Average Cost to Install Solar In Maine

The average home in Maine uses between 9,000 kWh and 12,800 kWh of electricity annually. The cost for a grid-tied, rooftop solar electric system designed to cover this electricity usage would have a direct purchase price between $21,126 and $28,539. Once the 30% tax credit is factored in, the net purchase price would range between $14,788 and $19,977.

If Your Bill Is Annual Electric Usage*Solar Array SizeEstimated Solar Purchase Price**Net Cost After
30% Tax Credit
$1406,431 kWh/yr5.0 kW array$15,990$11,193
$1889,003 kWh/yr
7.0 kW array$21,126$14,788
$26012,862 kWh/yr
10.0 kW array$28,539$19,977
$35518,007 kWh/yr
14.0 kW array$38,838$27,187
(**) Pricing estimates assume an unshaded, south-facing roof with a 35-degree roof pitch.
Production levels and costs will vary depending on your free site assessment findings.

 (*)You can find how much energy you use on your electric bill. 

What Type Of Solar Electric Systems Are Available?

The average system costs noted above are for a grid-tied, roof-mounted solar electric system. Grid-tied, rooftop solar systems are our most common type of solar electric system installed throughout Maine.

However, other solar system options, such as grid-tied, grid-tied + battery backup, off-grid battery-based systems, and ground mounts, are available. To ensure you get the information you need to make an informed decision about what type of solar system will work best for you, we have outlined the options below. 


These are the most common types of solar electric systems in Maine. With this system, your home can be powered by the sun when it is shining. You are still connected to your utility provider (often called the grid), so you still have power when sunlight is unavailable. Net Metering allows the electricity generated by your solar system to offset the electricity used from the grid at night or on a cloudy day. This ensures that all of your system’s electricity offsets your usage and, ultimately, your electric bill. However, if the grid goes down, your system will shut off, and you will lose power. Grid-tied systems are the less expensive option due to not needing batteries and other additional equipment.

Tesla Powerwall

Installing a grid-tied solar electric system is an excellent step towards energy independence. However, during a power outage, your system does not provide power. By pairing a grid-tied solar electric system with battery backup, you can bank the energy you produce for times when you need it, like when the grid goes down.  Although whole-house backup is achievable, most grid-tied battery backup systems are designed only to power “critical” electrical loads. If you are thinking about going solar now but want to add batteries in the future, we can design your system to accommodate your future battery needs. These systems are more costly than grid-tied alone. 

off-grid batteries

Many people like the idea of installing an off-grid solar system because of its independence. However, it could require a lifestyle change to reduce energy consumption as you cannot rely on the grid. These systems tend to be most popular in rural locations such as camps or where the nearest power line may be miles away. You will need batteries to store your energy, must monitor the battery health, and be aware that you have a finite amount of energy you can collect and store on a daily basis. These systems have special design and operation requirements making them more challenging to install and service than a more common grid-tied system. They also require more components and usually cost more. Maine Solar Solutions has a design and installation team experienced with off-grid solar systems if you would like to learn more.

Rooftop Solar Versus Ground Mounted Solar

There are two common types of solar panel installations for grid-tied solar systems: roof-mounted and ground-mounted. 

Most of the solar electric systems installed in Maine feature rooftop solar arrays. But sometimes aesthetic concerns or heavily shaded roofs make consideration of a ground-mounted solar array advisable. Ground-mounted solar arrays typically cost between 15 – 25% more than rooftop solar arrays. The expense of ground anchors, racking, and trenching accounts for this higher cost. Although a ground-mounted solar array costs more than an equal-sized rooftop array, many of our customers have found that a ground-mounted array provides the best balance of cost, aesthetics, and value. Our experienced solar consultants can show you the relative costs of both options and help you determine what makes the most sense.

The Homeowner’s Guide to Going Solar In Maine

A Homeowner's Guide to Going Solar in Maine

Download your free eBook!

This free resource answers the most common questions we receive about solar energy installations in Maine.

What Factors Affect The Cost Of A Solar Electric System?

During your free solar site assessment, we gather information about your home that we use to design your system. We prepare a proposal based on your electricity usage and show several different solar panel options. Below is the information that we gather that helps us get you a fixed-cost system price.

  • Electricity Usage: We review your electric bills and calculate the amount of electricity you use over the course of a year. 
  • Roof Information: People often ask, “Is my roof good for solar? Does my house face the right way for solar panels? What’s the ideal roof angle for solar?” To answer those questions, our solar consultants will measure the angle or pitch of your roof and determine the orientation of your home towards the south. Roofs that face toward the southeast or southwest may require an additional panel or two to produce the same amount of power as a roof that faces directly south. People are often surprised to learn that even if their roof faces directly toward the east or west, annual solar production can still make installing a solar system an affordable investment.
  • Shading Measurements: For electricity production, the more exposed your roof is to sunlight throughout the day, the better. Your roof does not need to have full sun all day to be a good candidate for solar, and a partially shaded roof may only require a few additional panels to match the production of an unshaded roof.
  • Solar Panel Type: Solar panels account for the greatest equipment cost for a solar electric system. We offer several different solar panels to choose from. There are many solar panel manufacturers, each offering multiple solar panel models. Solar panels differ in size, wattage, efficiency, appearance, and warranty. Each of these specifications impacts the solar panel’s cost and factors into their relative value. Our customers find it helpful when we present a range of solar panel options and take the time to educate them about the differences in panel features, performance, cost, and value.

What Incentives Are Available For Installing Solar?

The primary incentive for homeowners installing solar in Maine is the Federal Solar Tax Credit (ITC). Solar electric systems installed between 2022 and 2032 qualify for a 30% federal tax credit. This tax credit is scheduled to fall to 26% in 2033 and 22% in 2034. It is currently set to expire in 2035. There’s a lot of information about the ITC out there, so to help, we gathered answers to some commonly asked questions about the federal tax credit here.

What’s Included In My Solar Electric System Costs?

Once your system is designed and you have chosen which solar panels and optional add-ons you would like to include in your system, we prepare a fixed-cost installation contract that includes all of the equipment and labor required to install a safe, code-compliant system. Your fixed-cost solar electric system includes the following:


  • Solar Panels
  • Inverter system
  • Power Optimizers
  • System monitoring so that you can watch the entire array and each panel’s output information on your desktop or your phone
  • Racking and roof attachment equipment
  • Roof-specific attachment points
  • Electrical components required for a safe, code-compliant installation


  • Installation labor by Maine Solar Solutions qualified electricians and installers 
  • Maine Solar Solutions Maine Solar Solutions proudly offers Maine’s
    first 30-year solar warranty, setting a new standard in energy investment protection at no additional cost to you!


  • Assistance with all required paperwork, utility, and permitting
  • Utility interconnection application fee
  • Electric and building permits and associated fees

What Are The Additional Costs Involved To Go Solar?

During our site evaluation, we may determine that your electric service or breaker panel will need to be upgraded to accommodate the solar installation. Your solar proposal will detail the cost of any additional electrical work; the final system cost will include these costs. It’s also important to note that all grid-tied solar electric customers currently pay their utility providers a current rate of $22 per month to utilize the grid, known as an interconnection fee. That rate will still be incurred.

What Add-ons Or Options Are Available When Installing A Solar Electric System?

Battery Backup Systems:
A grid-tied solar electric system will not provide backup power during a power outage. We offer battery systems for customers seeking to add a backup power source to their grid-tied solar electric system. The most popular battery backup system is the Telsa Powerwall. Battery systems are eligible for the 30% federal tax credit.  If you’re curious about batteries, your solar consultant will review options with you.  Even if you aren’t ready for batteries during your initial solar installation, your solar electric system can be designed to allow for the easy addition of batteries later.

Electric Vehicle (EV) Chargers:
With the growing popularity of electric cars, many of our solar customers are requesting the installation of an electric car charging station at their homes. Combining an electric vehicle with a solar electric system in your home allows you to fix the cost of operating your electric car and truly enables you to operate your EV as a carbon-free, renewable energy vehicle. 

Is Going Solar A Good Return on Investment (ROI) In Maine?

Owning a solar electric system is one of the few investments that truly pays for itself in savings over time. A properly sized and designed solar electric system can eliminate nearly your entire annual electric bill. For most Maine homeowners, the solar electric system will pay for itself in as few as 7-10 years. Customers choosing to finance the purchase of their system may see longer payback times.

Once the system has paid for itself, a typical Maine solar system owner will only have to pay their fixed utility service charge – currently around $22 per month. Whether you pay for your solar system out of pocket or choose to finance the purchase, you have essentially fixed your cost of electricity and protected yourself from ever-increasing electricity price increases!

For someone in their 50’s, I looked at installing solar panels as saving for my 401K. Because when I am 70, who knows what the price of electricity will be. I am fixing the cost of most of my electricity for life!
– Cathy G., Gorham, ME

What Are The Ways To Pay For Solar Electric Systems?

Most customers choose between paying upfront for their solar electric system or financing the purchase and paying a monthly payment.

Direct Purchase: Choosing to pay for a solar electric system out of pocket will give you the highest return on your investment. You’ll own your solar panels immediately and not have to pay any interest. Many of our customers have taken advantage of low-interest rates and increasing home values to pay for their solar systems with home equity loans or when refinancing their mortgages.

Solar Loans:  Financing the purchase of a solar electric system allows you to fix your cost of electricity for the lifetime of your loan. Your fixed monthly payments may at first be higher than your monthly electric bill, but over time, as electricity rates go up, your monthly payments will stay the same.

Here at Maine Solar Solutions, we only work with recognized and socially responsible lenders who are dedicated to accelerating the transition to 100% clean energy. Our lenders offer consumer-friendly lending processes with easy online access, so customers can instantly qualify for no money down loans, fixed interest rates, and loan term options. During your solar process, we will review how a solar loan works and work together to build the best loan package possible for your goals and budget.

Other Considerations

Cost should not be the only factor when choosing a solar installation company. A solar electric system will last more than 25 years; it’s important to consider a qualified, experienced company that will provide guidance and support throughout the entire system life span.  From initial consult, through installation, with ongoing support and consultation, choose a company with a proven track record.  Keep in mind that solar electric systems are installed to meet the requirements of the National Electric Code and as such need to be installed by licensed electricians and qualified technicians under their supervision.

Free Solar Site Assessment 

Curious to see what a solar electric system would cost for your home?

At Maine Solar Solutions, our goal is to give you the information you need to make an informed decision. Schedule an informative, free, no-obligation solar consultation with one of our knowledgeable solar consultants today and begin your path towards energy independence.

491 US Route 1 Suite 20
Freeport, Maine 04032

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