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NuWatt designs, installs, and manages solar, battery, heat pump, and EV charger systems across 9 states. One company, one warranty, one point of contact.
Get a Free QuoteA 15kW system produces 18,000 kWh/year and saves an estimated $4,752/year at current Central Maine Power rates.
Net System Cost
Based on Central Maine Power rate of $0.26/kWh
System Cost
$44,506
State Incentive
$0
Net Cost
$44,506
Annual Production
18,000 kWh
Annual Savings
$4,752
Payback Period
9.4 years
25-Year Total Savings
$173,254
A 15kW solar system in Westbrook, Maine uses approximately 38 panels (400W each) and requires about 270 square feet of unshaded south-facing roof space. This size is typically a good fit for very large homes, all-electric households, or homes with EVs and heat pumps. At the current Central Maine Power rate of $0.26/kWh, which is 57% above the national average, a 15kW system produces approximately 18,000 kWh per year and saves $4,752 annually.
The total cost for a 15kW system in Westbrook is approximately $44,506 before incentives. The estimated payback period is 9.4 years. Over 25 years, you can expect total savings of $173,254.
The federal residential solar tax credit (Section 25D) expired at the end of 2025, so state and utility incentives are now the primary way to reduce your solar costs. Central Maine Power offers net metering, so any excess energy your 15kW system produces earns bill credits. NuWatt Energy handles the entire installation process in Westbrook, from system design through Central Maine Power interconnection.
4kW System
~10 panels · ~72 sq ft roof · Best for apartments, condos, or small homes with low electricity usage
6kW System
~15 panels · ~108 sq ft roof · Best for small to mid-size homes using 500-700 kWh per month
8kW System
~20 panels · ~144 sq ft roof · Best for average-size homes using 700-1,000 kWh per month
10kW System
~25 panels · ~180 sq ft roof · Best for large homes or households with above-average electricity usage
15kW System
Current~38 panels · ~270 sq ft roof · Best for very large homes, all-electric households, or homes with EVs and heat pumps
Investor-Owned Utility · $0.26/kWh
Rate
$0.26/kWh
Net Metering
Available
Solar Rebate
None
NuWatt Energy serves Westbrook with dedicated local crews. No lead sharing, no middlemen. Save $4,752/year with a 15kW system.