Solar panels in District of Columbia: cost, payback and the rules that matter
District of Columbia homes pay 24.7¢ per kWh for electricity, the 10th highest of 51, up 17.8% in a year. A typical home needs 14 panels. With no federal tax credit they pay for themselves in about 9.2 yrs.
Four facts that decide solar in District of Columbia
1. The sun. One kilowatt of panels makes about 1,335 kWh a year in Washington. Other towns differ a little; the planner works it out for any address.
2. The price of electricity. Every kWh your panels make is worth what you would otherwise pay: 24.7¢ in District of Columbia today.
3. What your utility pays for exports. Most District of Columbia utilities still credit exported solar close to the retail rate, but rules differ by utility and change often.
4. Incentives. The 30% federal Residential Clean Energy Credit (IRC §25D) ended for systems whose installation is completed after December 31, 2025 (One Big Beautiful Bill Act, P.L. We don't know of a statewide income-tax credit for home solar in District of Columbia.
District of Columbia's homes
324,491 households; 41.5% own their home. 88,655 owner-occupied single-family houses: the main market for rooftop solar. The median home was built in 1958; 46.9% heat with electricity.
ACS 2020–2024 5-year estimates, U.S. Census Bureau.
Plan a specific District of Columbia home
Solar in Washington, District of Columbia’s largest city
| City | Sun hrs/day | kWh per kW | Best tilt | Typical kW | Payback (NM) | Payback (NB) | Solar ¢/kWh |
|---|---|---|---|---|---|---|---|
| Washington | 4.7 | 1,335 | 35° | 5.9 | 9.2 yrs | 15.0 yrs | 11.7 |
NM = exports credited at retail (net metering); NB = exports at ~30% of retail (net billing). Systems sized to the District of Columbia average home. $3.00/W, cash, 25 years.
Rule changes that affect District of Columbia
All changes and deadlines →- Federal: In-service deadline for the lease/PPA solar credit · Tax credits
- Federal: National data: solar prices fell to a median $3.60 per watt · Prices
- Federal: Construction-start deadline passed for the lease/PPA credit · Tax credits
- Federal: The 30% homeowner solar tax credit is gone · Tax credits
Questions about solar in District of Columbia
How much do solar panels cost in District of Columbia?
A 5.9 kW system, the size the average District of Columbia home needs, costs about $14,750 to $22,125 before incentives in 2026.
Is solar worth it in District of Columbia?
In the median District of Columbia city, solar pays for itself in about 9.2 yrs if exported power earns the retail rate, or 15.0 yrs if it earns about 30% of retail. Most utilities here still offer some form of net metering; check yours.
Is there a solar tax credit in District of Columbia?
We know of no statewide income-tax credit for home solar in District of Columbia; utilities and cities sometimes offer rebates. The 30% federal credit ended for homeowner systems installed after December 31, 2025.
How many solar panels does a District of Columbia home need?
About 14 panels of 420 watts for the state-average 639 kWh a month. In Washington, 1 kW of panels makes about 1,335 kWh a year.