How much do solar panels cost in Washington D.C.?

In Washington D.C., solar panel installation averages about $2.95 per watt. For a typical $150 monthly electric bill, a 5.1 kW system (13 panels) costs approximately $15,340 before incentives, or $10,738 after the 30% federal tax credit.

Is solar worth it in Washington D.C.?

Yes — with 4.9 peak sun hours per day and 25.4¢/kWh electricity rates, solar in Washington D.C. typically pays for itself in 5.9 years. The rating is Excellent.

Solar Panel Cost & Savings in Washington D.C. (2026)

Quick Washington D.C. Solar Facts

4.9

Peak Sun Hours/Day

25.4¢

Electricity Rate

$2.95

Install Cost/Watt

5.9 yrs

Avg Payback

In Washington D.C., a typical 5.1 kW system (13 panels) costs approximately $10,738 after the 30% federal tax credit. With 4.9 peak sun hours per day and 25.4¢/kWh electricity rates, annual savings average $1,820 with a payback period of 5.9 years. Rating: Excellent. Source: NREL PVWatts v8 (PSH), US EIA July 2026 (rates), SEIA/EnergySage Q1 2026 (costs).

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How many solar panels do I need in Washington D.C.?

For a typical home with a $150 monthly electric bill in Washington D.C., you need about 13 panels (5.2 kW system). Your exact number depends on your specific monthly usage and roof orientation.

What solar incentives are available in Washington D.C.?

Every US homeowner qualifies for the 30% federal Investment Tax Credit (ITC) through 2032. Many states also offer additional incentives — check our main calculator's Incentives tab for Washington D.C.-specific rebates, tax credits, and net metering policies.

Is Washington D.C. a good state for solar?

Washington D.C. has 4.9 peak sun hours per day (U.S. average: 4.98). With electricity at 25.4¢/kWh (U.S. average: 18.83¢/kWh), solar in Washington D.C. typically pays for itself in 5.9 years. Overall rating: Excellent.