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Solar in Montgomery County, MD

Solar panels in Rockville, MD

4.3 peak sun hours per day. See what the data says about Rockville, then check your specific roof free.

Utility territory: Pepco

Local context

What limits Rockville roofs

Rockville averages 4.3 peak sun hours per day in the regional data. Roof orientation, usable area, and shade can reduce production further for an individual property.

Solar data for Rockville

Peak sun hours / day
4.3 hrs

Modeled annual average.

Typical system size
6–11 kW

Residential, based on typical household load.

Estimated first-year savings
$1,750–$3,250

Per year for a typical 6–11 kW system. The high end assumes the larger array.

Roofs suitable for solar
58–70%

Modeled from regional adoption data.

Primary utility
Pepco

Contact your utility for current net billing enrollment status.

Net metering / billing
Net Billing (RCP)

Maryland currently requires full retail-rate net metering with monthly rollover, so exported energy offsets consumption at the retail rate for systems interconnected while the program remains open; the current program is scheduled to close by July 2027 (earlier if the statewide capacity cap is reached first), and its successor is expected to credit exports at a lower rate. This estimate assumes a system sized to your annual usage.

Estimates use the average Maryland current utility rate (before solar) of $0.22/kWh (EIA, retrieved Aug 2026) and modeled solar production; individual results vary with your rate, usage, roof orientation, and shading.

Personalized estimate

Estimate your first-year solar savings

Start with your bill or adjust the rate and typical system size for Rockville.

kW

Typical homes: 6–11 kW.

$/ kWh

Prefilled with the state residential average.

Estimated first-year savings

$2,500/ yr

$1,750–$3,250/yr for a typical 6–11 kW system — the low end is a smaller array, the high end a larger one.

Estimate — individual results vary with your rate, usage, roof orientation, and shading. Assumes an 85% system derate and 100% self-consumption; exported energy uses the local net-billing estimate.

City averages are a starting point — check your address for your verified result.

Frequently asked questions

How much sun does Rockville get for solar?

Rockville receives approximately 4.3 peak sun hours per day on average, based on modeled regional data.

What is the estimated first-year savings from solar in Rockville?

For a typical 6–11 kW system in Rockville, first-year savings are estimated at $1,750–$3,250 per year: the low end uses the smaller system, while the high end is up to the larger system. Estimates use the average Maryland current utility rate (before solar) of $0.22/kWh (EIA, retrieved Aug 2026) and modeled solar production; individual results vary with your rate, usage, roof orientation, and shading. These are educational estimates, not guarantees.

What can limit solar production in Rockville?

Rockville averages 4.3 peak sun hours per day in the regional data. Roof orientation, usable area, and shade can reduce production further for an individual property.

Data source: City figures are modeled estimates for general guidance — not a quote for any specific property.

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The city data above is a regional estimate. Enter your address to get a personalized result based on your actual roof.

Solar data for nearby Maryland cities

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