2026 · No Federal Tax Credit · NREL + EIA Data
Solar Panels in Maine: Cost, Payback & ROI (2026)
Is solar still worth it in Maine after the 30% federal tax credit expired? These pre-computed estimates use NREL PVWatts production data and current 24.8¢/kWh Maine electricity rates for a typical home using 900 kWh/month.
Section 25D (30% federal solar tax credit) expired December 31, 2025
All numbers below reflect 2026 math with no federal residential credit. State incentives, where applicable, are noted in the section below.
Maine Solar at a Glance
Based on a 900 kWh/month home ($223/mo electric bill at 24.8¢/kWh), 100% offset, no state rebate applied.
9.4 kW
For 900 kWh/month home
$27,704
At $2.95/W (LBNL 2024 avg)
9.5 years
Without state rebate
$2,678
Estimated annual savings
$85,653
Cumulative before rebate
$57,949
Savings minus system cost
24.8¢/kWh
very high vs. 16.0¢ U.S. avg · EIA 2025
1,150 kWh/kW/yr
limited · 3.5 peak sun hrs/day · NREL PVWatts
Is Solar Worth It in Maine in 2026?
Maine pays 24.8¢/kWh — well above the U.S. average — and the state's growing solar market has benefited from a strong net metering framework. Efficiency Maine offers rebates and incentives for home energy improvements. Maine's solar resource is limited compared to Sun Belt states, but high rates compensate, especially for homes with significant heating loads transitioning to heat pumps.
For a typical Maine home consuming 900 kWh per month, our calculation shows a 9.4 kW system needed for 100% offset. At the current national average installed cost of $2.95/W (LBNL Tracking the Sun 2024), that's $27,704 gross before any state rebates. Year-one savings of $2,678 grow each year as electricity rates escalate — the model assumes 2.5%/year (EIA AEO 2024).
The 9.5 years payback period is solid — at or below the national average of 8–12 years. Over 25 years — the standard warranty period for most premium panels — a Maine homeowner following this profile would save an estimated $85,653 total, for a net benefit of $57,949 after recovering the system cost.
Year-by-Year Savings Snapshot: First 10 Years
Based on 9.4 kW system, 0.5%/yr degradation, 2.5%/yr rate escalation, no state rebate.
| Year | Production (kWh) | Annual Savings | Cumulative |
|---|---|---|---|
| Year 1 | 10,800 | $2,678 | $2,678 |
| Year 2 | 10,746 | $2,732 | $5,410 |
| Year 3 | 10,692 | $2,786 | $8,196 |
| Year 4 | 10,639 | $2,841 | $11,037 |
| Year 5 | 10,586 | $2,898 | $13,935 |
| Year 6 | 10,533 | $2,955 | $16,890 |
| Year 7 | 10,480 | $3,014 | $19,904 |
| Year 8 | 10,428 | $3,074 | $22,978 |
| Year 9 | 10,375 | $3,135 | $26,114 |
| Year 10✓ Paid off | 10,324 | $3,197 | $29,311 |
System cost to recover: $27,704. Table shows savings without state rebate applied. Use the interactive calculator to enter your actual bill and any rebate.
Solar Incentives in Maine (2026)
Efficiency Maine provides upfront rebates for solar installations through its residential solar program and coordinates with community solar programs for renters.
- Efficiency Maine residential solar rebates
- Community solar program (for renters/unsuitable rooftops)
- Property tax exemption on solar added value
- Retail-rate net metering
Incentive programs change frequently. Verify current offerings at dsireusa.org or directly with your utility before making any purchasing decision.
How We Calculate Maine Solar ROI
These estimates use the same methodology as our interactive solar ROI calculator, applied to Maine-specific data:
System cost
$2.95/W installed
LBNL Tracking the Sun 2024
Solar production
1,150 kWh/kW/yr
NREL PVWatts v8
Electricity rate
24.8¢/kWh
EIA Residential Rates 2025
Rate escalation
2.5%/year
EIA Annual Energy Outlook 2024
Panel degradation
0.5%/year
NREL (Jordan & Kurtz, median)
System lifetime
25 years
Standard warranty period
No Section 25D (federal residential solar credit) is included — it expired December 31, 2025. State incentives are not reflected in these pre-computed figures; use the interactive calculator to enter specific rebate amounts.
Calculate With Your Actual Numbers
The figures above use statewide averages. Enter your actual monthly bill, any Maine rebate amounts, and your offset target in our interactive calculator for a personalized estimate.
Frequently Asked Questions — Solar in Maine
Compare Other States
Estimates are based on NREL PVWatts v8 production data, EIA 2025 electricity rates, and LBNL 2024 installed cost benchmarks. Actual savings vary by roof pitch, shading, utility rate structure, and local permit costs. This is not financial advice. Consult a licensed solar installer before making any purchasing decision.