Solar Panel Cost in Rockville, MD
Estimated costs and savings for ZIP code 20850 — updated for 2026
Urgent tax credit deadlines
- Section 48E phase-out completes December 31, 2027 — projects must be placed in service by then (515 days left).
Gross Cost
$23,100
7kW system
Annual Savings
$1,499
$125/month
Payback Period
15.4 yrs
Break-even
Peak Sun Hours
4.6
hrs/day avg
Solar System Cost Breakdown — Rockville, MD
Estimated costs and savings for different residential solar system sizes in ZIP 20850. Costs based on MD average of $3.30/W and utility rate of $0.15/kWh.
| System | Cost | Savings/yr | Payback |
|---|---|---|---|
| 4 kW | $13,200 | $856 | 15.4 yrs |
| 5 kW | $16,500 | $1,070 | 15.4 yrs |
| 6 kW | $19,800 | $1,284 | 15.4 yrs |
| 7 kW(typical) | $23,100 | $1,499 | 15.4 yrs |
| 8 kW | $26,400 | $1,713 | 15.4 yrs |
| 10 kW | $33,000 | $2,141 | 15.4 yrs |
Solar Production in Rockville, Maryland
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
$0.15/kWh
Above-average rates — good solar savings potential
Cost Per Watt in MD
$3.30/W
Near national average for installed cost
Solar Panel FAQ — Rockville, MD
How much do solar panels cost in Rockville, MD?
A typical 7kW solar system in Rockville, MD (ZIP 20850) costs approximately $23,100 before any incentives. This works out to about $3.30 per watt installed. Smaller systems start around $13,200, while larger 10kW systems can cost up to $33,000.
How long is the solar payback period in Rockville?
The average solar payback period in Rockville, MD is approximately 15.4 years for a 7kW system. With estimated annual savings of $1,499, 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 20850?
Homeowners in Rockville, MD (ZIP 20850) can save approximately $125 per month or $1,499 per year with a standard 7kW solar system. Over 25 years, total savings can exceed $37,475, depending on utility rate increases.
How many peak sun hours does Rockville get?
Rockville, MD 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 Rockville?
The average home in Rockville, MD 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 20850.
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