Cost & Savings Breakdown
Based on $150/month electric bill in South Portland
System Size
7 kW
Annual Production
8,202 kWh
Gross System Cost
$23,876
Federal Tax Credit (30%)
-$7,163
State Incentive
-$2,000
Net Cost
$14,713
Monthly Savings
$122
CO₂ Offset/yr
7,546 lbs
25-Year Savings Projection
Utility & Net Metering
Local UtilityCentral Maine Power
Net Metering PolicyFull Retail
Compensation RateFull retail rate
Capacity LimitNo overall limit
Electricity Rate$0.178/kWh
Peak Sun Hours4 hrs/day
Available Incentives
30%
Federal ITC — Deduct 30% of your system cost from federal taxes. Available through 2032.
$2,000
Maine State Incentive — Maine offers a solar rebate program up to $2,000.
Common Questions
How much does solar cost in South Portland?
Solar in South Portland, Maine costs approximately $23,876 for a 7 kW system. After the 30% federal tax credit, your net cost is about $14,713.
What is the solar payback period in South Portland?
The estimated payback period for solar in South Portland is 10.1 years, based on a $150/month electric bill and local sun hours of 4 hrs/day.
Does Central Maine Power offer net metering?
Central Maine Power offers Full Retail net metering. Full retail rate.