
Solar Panel Cost in Maine
Updated 2026 guide to solar panel prices, savings, and payback period in Maine.
Estimated Solar Savings
Solar Panel System Costs in Maine
Below are estimated costs for different solar panel system sizes in Maine, including the 30% federal solar tax credit.
| System Size | Cost Before Incentives | Federal Tax Credit (30%) | Net Cost | Est. Annual Production |
|---|---|---|---|---|
| 4 kW | $12,000 | -$3,600 | $8,400 | 5,548 kWh |
| 6 kWMost Popular | $18,000 | -$5,400 | $12,600 | 8,322 kWh |
| 8 kW | $24,000 | -$7,200 | $16,800 | 11,096 kWh |
| 10 kW | $30,000 | -$9,000 | $21,000 | 13,870 kWh |
| 12 kW | $36,000 | -$10,800 | $25,200 | 16,644 kWh |
What Affects Solar Panel Cost in Maine?
The average cost of solar panels in Maine is $300/watt before incentives. For a typical 6kW residential system, that means a total cost of about $18,000 before the federal tax credit.
After applying the 30% federal Investment Tax Credit (ITC), your net cost drops to approximately $12,600.Maine homeowners typically see a payback period of 9 years and save an estimated $28,000 over 25 years.
Maine solar costs have fallen roughly 38% over the past decade. Net metering policies and community solar programs have helped drive adoption and lower costs.
Factors that affect your cost:
- System size: Larger systems cost more but have a lower cost per watt
- Equipment quality: Premium panels and inverters cost more but offer better efficiency
- Roof complexity: Steep roofs, multiple levels, or shading can increase installation costs
- Local labor rates: Installation costs vary by region within Maine
- Incentives: State and local programs can significantly reduce your out-of-pocket cost

Solar Incentives in Maine
Federal Solar Investment Tax Credit
30% Federal Tax Credit (ITC)
Maine homeowners can take advantage of the 30% federal solar tax credit along with state-level net metering benefits.
State & Local Incentives
Net Energy Billing
Net MeteringMaine's net energy billing program provides credits for solar energy produced at rates that vary by project type.
Efficiency Maine Rebate
RebateEfficiency Maine offers rebates for heat pump installations that can be paired with solar for maximum energy savings.
Property Tax Exemption
Property TaxMaine municipalities can offer property tax exemptions for solar energy equipment.
Net Metering
Maine's net energy billing allows residential solar customers to receive credits for excess generation. Community solar options are also available throughout the state.
AvailableSRECs
Maine does not have a traditional SREC market but has a Renewable Portfolio Standard that supports solar development.
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Solar Panel Cost FAQ - Maine
The cost of solar panels in Maine typically ranges from $2.50 to $3.50 per watt before incentives. For a standard 6 kW residential system, homeowners in Maine can expect to pay between $15,000 and $21,000 before the federal tax credit. After applying the 30% federal Investment Tax Credit, the net cost drops to approximately $10,500-$14,700. Actual costs vary based on your specific roof, chosen equipment, and installer. We recommend getting at least three quotes from local Maine solar installers to find the best price.
The average solar payback period in Maine depends on local electricity rates, available incentives, and sun exposure. Most Maine homeowners see a payback period between 6 and 10 years. After the payback period, you essentially enjoy free electricity for the remaining 15-20+ years of your system's life. Higher local electricity rates and additional state incentives can shorten the payback period significantly. A qualified Maine solar installer can calculate your specific payback period based on your energy usage and roof characteristics.
Maine homeowners who install solar panels typically save between $20,000 and $50,000 over 25 years, depending on system size, electricity rates, and available incentives. These savings come from reduced or eliminated electricity bills, net metering credits, and any applicable SREC income. As electricity rates in Maine continue to rise (historically averaging 2-3% annually), your savings grow each year. The combination of the 30% federal tax credit and any Maine-specific incentives helps maximize your return on investment.
The right solar system size for your Maine home depends on your electricity consumption, roof space, and budget. The average Maine home uses approximately 10,000-11,000 kWh per year, which typically requires a 6-8 kW solar system. To determine your ideal size, review your annual electricity usage on recent utility bills. Factors like Maine's average peak sun hours, your roof orientation, and any shading will affect how many panels you need. A professional Maine solar installer will use satellite imagery and your usage data to recommend the optimal system size.
Yes, solar is generally worth the investment for Maine homeowners in 2025. With solar panel costs at historic lows, the 30% federal tax credit still available, and electricity rates continuing to rise, the financial case for solar in Maine is strong. Most Maine homeowners who go solar see positive returns within 6-10 years, followed by 15-20+ years of significant savings. Additionally, solar panels increase your home value, provide energy independence, and protect against future electricity rate increases. The best way to determine if solar is right for your Maine home is to get a free, customized quote from a qualified local installer.
Solar Panel Costs by City in Maine
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