Solar Panel Cost in South Portland, ME
Updated 2026 guide to solar panel prices, savings, and payback period in South Portland.
Estimated Solar Savings
Solar Panel System Costs in South Portland, ME
Below are estimated costs for different solar panel system sizes in South Portland, 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 South Portland?
The average cost of solar panels in South Portland, ME is approximately $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.South Portland homeowners typically see a payback period of 9 years and save an estimated $28,000 over 25 years.
Factors that affect your cost in South Portland:
- 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 within the South Portland metro area
- Local permits: Permitting costs and requirements vary by municipality in South Portland
- Incentives: State and local programs can significantly reduce your out-of-pocket cost
Solar Incentives Available in South Portland
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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Top Solar Companies in South Portland, ME
Venture Home Solar, LLC
Solar Panel Cost FAQ - South Portland, ME
The average cost of solar panels in South Portland is approximately $3.00 per watt before incentives. A typical 6kW residential system costs about $18,000 before the 30% federal tax credit, bringing the net cost to around $12,600.
The typical payback period for solar panels in South Portland is approximately 9 years. After that, you'll enjoy free electricity for the remaining 15-20+ years of your system's life, saving an estimated $28,000 over 25 years.
South Portland homeowners can take advantage of the 30% federal solar tax credit, which reduces your system cost by 30%. Maine also offers net metering, and various state-level incentive programs. Check our incentives page for the complete list.
South Portland homeowners can save an estimated $28,000 over 25 years by going solar. Actual savings depend on your electricity usage, system size, roof orientation, and available incentives. With electricity rates averaging $0.18/kWh in Maine, solar provides significant long-term savings.
Solar Costs in Other Maine Cities
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