Solar Panel Cost in Washington, DC
Estimated costs and savings for ZIP code 20009 — updated for 2026
Urgent tax credit deadlines
- Section 48E phase-out completes December 31, 2027 — projects must be placed in service by then (469 days left).
Gross Cost
$22,400
7kW system
Annual Savings
$2,537
$211/month
Payback Period
8.8 yrs
Break-even
Peak Sun Hours
4.6
hrs/day avg
Solar System Cost Breakdown — Washington, DC
Estimated costs and savings for different residential solar system sizes in ZIP 20009. Costs based on DC average of $3.20/W and utility rate of $0.25/kWh.
| System | Cost | Savings/yr | Payback |
|---|---|---|---|
| 4 kW | $12,800 | $1,450 | 8.8 yrs |
| 5 kW | $16,000 | $1,813 | 8.8 yrs |
| 6 kW | $19,200 | $2,175 | 8.8 yrs |
| 7 kW(typical) | $22,400 | $2,537 | 8.8 yrs |
| 8 kW | $25,600 | $2,900 | 8.8 yrs |
| 10 kW | $32,000 | $3,625 | 8.8 yrs |
Solar Production in Washington, District of Columbia
Average Peak Sun Hours
4.6 hours/day
Good solar resource — solid investment
Est. Annual Production (7kW)
9,990 kWh
Based on 4.6 PSH × 7kW × 365 days × 85% efficiency
Average Utility Rate
$0.25/kWh
High utility rates make solar especially valuable
Cost Per Watt in DC
$3.20/W
Near national average for installed cost
Solar Panel FAQ — Washington, DC
How much do solar panels cost in Washington, DC?
A typical 7kW solar system in Washington, DC (ZIP 20009) costs approximately $22,400 before any incentives. This works out to about $3.20 per watt installed. Smaller systems start around $12,800, while larger 10kW systems can cost up to $32,000.
How long is the solar payback period in Washington?
The average solar payback period in Washington, DC is approximately 8.8 years for a 7kW system. With estimated annual savings of $2,537, the system pays for itself and then generates free electricity for the remaining 15-20+ years of its lifespan.
How much can I save with solar panels in 20009?
Homeowners in Washington, DC (ZIP 20009) can save approximately $211 per month or $2,537 per year with a standard 7kW solar system. Over 25 years, total savings can exceed $63,425, depending on utility rate increases.
How many peak sun hours does Washington get?
Washington, DC receives an average of 4.6 peak sun hours per day. This is near the national average, making solar a solid investment in this area.
What size solar system do I need for my home in Washington?
The average home in Washington, DC needs a 7kW solar system to offset their electricity usage. The exact size depends on your monthly electric bill, roof orientation, and available space. A 7kW system would produce approximately 9,990 kWh annually in ZIP 20009.
Solar Tools for District of Columbia
Looking for another area? Browse all ZIP codes →