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District of Columbia Solar Cost Calculator

Estimate the cost and payback of a residential solar system in District of Columbia. 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 yield1,386 kWh/kW
Installed-cost benchmark$3.09/W
Federal credit assumed0%
Electricity rateloading…
2026 state snapshot

What changes in District of Columbia

The District of Columbia's July 2026 residential electricity benchmark is 25.21¢/kWh. Combined with a 1,386 kWh/kW-year planning yield and a $3.09/W installed-cost benchmark, an 8 kW system has a distinct district-level planning profile.

View District of Columbia electricity rates →
Residential electricity rate25.21¢/kWhDistrict benchmark
8 kW annual production11,088 kWh1,386 kWh/kW planning yield
8 kW gross benchmark cost$20,720$4/W planning benchmark
Annual value at full retail$2,795$233/month equivalent
Simple payback at full retail7.4 yearsBefore financing and unverified incentives
Existing city pages6Current 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 District of Columbia 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 District of Columbia

Open the Washington page for the district planning benchmark and local search context.

WashingtonCity solar estimate →

How this District of Columbia estimate works

  • Annual production = system size × 1,386 kWh/kW planning benchmark.
  • Retail-value ceiling = annual production × current District of Columbia 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

1,386 kWh/kW-year planning benchmark for District of Columbia; 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 District of Columbia differs

Residential electricity25.21¢/kWh
8 kW annual production11,088 kWh
8 kW benchmark gross cost$20,720
Simple retail-value payback7.4 years

The District of Columbia's July 2026 residential electricity benchmark is 25.21¢/kWh. 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

District of Columbia solar methodology

Production basis

1,386 kWh/kW-year planning benchmark for District of Columbia; a planning input, not a statewide average or site-specific roof forecast.

Installed-cost basis

3.09 $/W planning benchmark; this is not an installer quote.

Electricity benchmark

25.21¢/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.

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