Solar Calculators for Washington, DC
Free tools pre-loaded with Washington sun hours, electricity rates, and DC net metering policy.
Peak sun hours
4.3
hrs/day annual avg
Avg electricity rate
15.0¢
per kWh (Pepco)
Typical install cost
$3/W
DC median (2026)
Typical 8 kW system in Washington
Annual production
12,556 kWh
Year-1 savings
$1,883
System cost (est.)
$24,000
Simple payback
~13 yrs
Estimates based on 4.3 peak sun hours, 15.0¢/kWh, and $3/W installed cost. No federal tax credit (Section 25D expired Dec 31, 2025).
Run the numbers for Washington
Size my system
kW needed from your bill
Pre-filled for Washington →Savings calculator
25-year savings & ROI
Pre-filled for Washington →Payback period
Break-even analysis
Pre-filled for Washington →Solar potential
Address-based production
Pre-filled for Washington →TOU optimizer
Model peak/off-peak rates
Pre-filled for Washington →Quote checker
Is my quote a fair price?
Pre-filled for Washington →DC solar incentives
Available to Washington homeowners. Note: the federal Section 25D residential solar credit expired December 31, 2025.
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