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Kennebunk solar costs $2.85-$3.15/W in 2026, averaging $25,500 for an 8.5 kW system. CMP provides 1:1 NEB credits at $0.27/kWh, generating ~$2,754/year. No federal 25D ITC. Property tax 100% exempt. Historic district may require design review. Payback: ~15 years (cash) or day-1 savings (PPA).
$3.00/W
Avg Cost
$25,500
8.5 kW System
$0.27
CMP Rate (/kWh)
$2,754
NEB/Year
~15 yr
Payback
Kennebunk solar installation costs $2.85-$3.15 per watt in 2026. This charming coastal tourist town offers a mix of historic village homes and newer residential developments, with solar-ready roofs common in the outer neighborhoods along Route 1 and Route 35.
| Component | Cost Range |
|---|---|
| Solar panels (8.5 kW) | $8,500-$10,200 |
| Inverter(s) | $2,500-$3,800 |
| Mounting and racking | $2,000-$3,000 |
| Electrical work and wiring | $2,400-$3,400 |
| Permitting and interconnection | $500-$900 |
| Labor and installation | $4,800-$6,500 |
| Design, engineering, overhead | $3,000-$4,200 |
| Total (before incentives) | $24,225-$26,775 |
The Section 25D residential solar tax credit expired December 31, 2025. Kennebunk homeowners pay the full system cost with $0 federal tax credit in 2026.
100% property tax exemption statewide (solar adds no property tax). Sales tax exemption is unverified — verify with your installer.
Kennebunk homes range from compact village properties in the historic center to larger homes along Route 1, Route 35, and the Kennebunk Beach area. System sizes typically range from 5-12 kW, with 8.5 kW being the local average.
| System Size | Panels | Cost Range | Annual NEB | Payback |
|---|---|---|---|---|
| 5 kW | 11-12 | $14,250-$15,750 | $1,350 | ~15 yr |
| 8 kW | 18-19 | $22,800-$25,200 | $2,160 | ~15 yr |
| 8.5 kW | 19-20 | $24,225-$26,775 | $2,754 | ~15 yr |
| 12 kW | 27-28 | $34,200-$37,800 | $3,888 | ~14 yr |
* 8.5 kW highlighted as the Kennebunk average. All costs before incentives. NEB based on CMP $0.27/kWh.
10,200
kWh/year (8.5 kW system)
$2,754
Annual NEB credits
~15 yrs
Payback (cash purchase)
System cost: $25,500
Year 1 NEB value: $2,754
Rate increase (est): 4-5%/year
Payback (cash): ~15 years
25-year savings: $45,000-$70,000+
ROI after 25 years: 80-170%
NuWatt's Propel financing offers $0 down with a fixed monthly payment lower than your CMP bill. Unlike a lease, you own the panels by year 5. See if you qualify at /maine/propel-solar
Maine's Net Energy Billing program gives Kennebunk homeowners 1:1 retail-rate credits for every kilowatt-hour of solar electricity exported to the CMP grid. This is one of the most favorable net metering policies in New England.
Learn more about Maine's net metering in our Maine NEB Guide.
Many Kennebunk homeowners prefer to keep their cash free for other investments. Propel Solar gives you $0 down, a fixed monthly payment lower than your CMP bill, and full ownership by year 5 — without tying up $25,000+.
A third-party owner installs solar on your roof and captures the 30% Section 48 ITC — a credit no longer available to homeowner purchases.
Your monthly solar payment is fixed and lower than your average CMP bill. No escalators. Predictable costs while CMP rates keep rising.
Full ownership transfers to you at year 5. American-made Silfab 440W panels. Free maintenance during the lease period.
Cash purchase: $25,500 upfront, ~15 year payback, $0 federal credit.
Propel: $0 down, save from day 1, own by year 5, 30% built-in discount.
Kennebunk, Kennebunkport, Wells, Biddeford, Saco, Arundel, York, Kittery — all CMP territory.
Kennebunk is a charming coastal town of approximately 13,000 residents, known for its historic village center, beautiful beaches, and proximity to Kennebunkport. While tourism drives the summer economy, year-round residents benefit from strong solar economics with NEB credits generating savings throughout the year.
$25,500
$0 Down
$0 Down
Compare all options in our Maine Cash vs Loan vs Lease Guide.
All southern Maine communities near Kennebunk are in CMP territory with the same rates and NEB credits. Solar costs are similar across the region.
CMP | $0.27/kWh
Upscale coastal neighbor. Same CMP rates with higher-value homes.
CMP | $0.27/kWh
CMP territory. Mix of year-round and seasonal properties.
CMP | $0.27/kWh
Larger city to the north with competitive solar pricing.
CMP | $0.27/kWh
CMP territory. Rural homes with excellent ground-mount options.
CMP | $0.27/kWh
Inland community with lower housing costs and strong solar ROI.
Kennebunk requires in-person permit applications at town hall. The historic village center has an overlay that may require design review for solar installations.
Building permit
Required. Covers structural and roof modifications.
Electrical permit
Required separately. Covers inverter and panel wiring.
Processing time
~8 business days typical (up to 10 in historic areas).
In-person required
Permits must be submitted in person at Kennebunk Town Hall.
Historic district
Properties in the historic village center may require design review, adding 2-4 weeks.
CMP interconnection
Application filed by installer. Approval 2-4 weeks.
Coastal zone
Kennebunk Beach properties: marine-grade equipment and wind-load engineering may be required.
Maine Solar Hub
Complete Maine solar guide
Maine Solar Costs
Statewide cost data
Solar Without ITC
Post-25D strategies
NEB Guide
Net Energy Billing explained
Cash vs Loan vs Lease
Financing compared
Portland Solar
$2.95-$3.19/W
Kittery Solar
$2.85-$3.15/W
York Solar
$2.85-$3.15/W
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