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Maine Solar Cost Calculator

Estimate the cost and payback of a residential solar system in Maine. Adjust system size, installed price, value captured and verified incentives using transparent 2026 planning data.

Federal residential solar credit in 2026: $0. CalcuRiver does not subtract the expired 30% Section 25D credit from this estimate. Add only local or utility incentives you have independently verified.
State planning yield1,311 kWh/kW
Installed-cost benchmark$2.93/W
Federal credit assumed0%
Electricity rateloading…
2026 state snapshot

What changes in Maine

Maine's residential electricity rate is 77.0% above the U.S. average. Combined with a planning yield of 1,311 kWh/kW-year and a $3/W installed-cost benchmark, the same 8 kW system produces a different state-level cost and value profile.

View Maine electricity rates →
Residential electricity rate32.41¢/kWh77.0% above U.S. average
8 kW annual production10,488 kWh1,311 kWh/kW planning yield
8 kW gross benchmark cost$23,440$3/W planning benchmark
Annual value at full retail$3,399$283/month equivalent
Simple payback at full retail6.9 yearsBefore financing and unverified incentives
Existing city pages2Current CalcuRiver city coverage

This 8 kW snapshot is a comparison scenario, not a quote. It uses CalcuRiver's state planning yield, installed-cost benchmark and EIA 2026-07 residential rate. Actual roof production, export compensation, taxes, financing and local incentives can materially change the result.

state solar model

Build your Maine scenario

Start with state planning benchmarks, then replace them with your actual quote or site-specific inputs.

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The state planning benchmark is not a statewide average and does not replace a roof-specific production model or utility export analysis.

city coverage

Solar cost by city in Maine

Open a city page for a location-specific production benchmark and local planning inputs.

LewistonCity solar estimate →PortlandCity solar estimate →

How this Maine estimate works

  • Annual production = system size × 1,311 kWh/kW planning benchmark.
  • Retail-value ceiling = annual production × current Maine residential electricity price.
  • The value-capture control lets you haircut that ceiling for self-consumption/export economics.
  • Simple payback = entered net installed cost ÷ modeled annual electricity value.

Source boundaries

1,311 kWh/kW-year planning benchmark for Maine; a planning input, not a statewide average or site-specific roof forecast. Roof orientation, shading, equipment, local weather and utility export compensation can materially change the result.

Production methodologyCost benchmarkDetailed solar calculator
2026 state snapshot

How Maine differs

Residential electricity32.41¢/kWh
8 kW annual production10,488 kWh
8 kW benchmark gross cost$23,440
Simple retail-value payback6.9 years

Maine's July 2026 residential electricity benchmark is 77.0% above the U.S. average. Production and cost are planning benchmarks; utility export rules can change realized savings.

Rate source: EIA Electric Power Monthly Table 5.6.A · 2026-07 preliminary.

methodology & sources

Maine solar methodology

Production basis

1,311 kWh/kW-year planning benchmark for Maine; a planning input, not a statewide average or site-specific roof forecast.

Installed-cost basis

2.93 $/W planning benchmark; this is not an installer quote.

Electricity benchmark

32.41¢/kWh residential state benchmark for 2026-07 (preliminary).

Utility treatment

State pages show a planning-level retail-value benchmark. Utility export compensation can materially change realized savings.

Methodology: Solar utility model · CalcuRiver methodology.

why this estimate changes

Why this solar estimate changes

Solar value is driven by local production, installed cost, the retail value of electricity you avoid buying, and the compensation you receive for exported energy. CalcuRiver does not assume export credits equal the retail rate unless that utility program is explicitly verified.

Core logic: self-used solar offsets retail purchases; exported solar is valued only under a verified export-compensation rule.

Methodology & source policy

Continue this cost analysis

Use the same state context to connect solar production with grid prices, storage and EV charging.

Maine electricity ratesSee the grid-price benchmark used to value solar production.Maine home battery economicsEstimate storage value and self-consumption in the same state.EV charging in MaineSee how the same electricity market affects vehicle charging.