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Rockingham County DominionRECSVECHEC Installer core area

Solar panels in Timberville, Virginia: 1,363 kWh per kW per year

A south-facing kilowatt of panels in Timberville makes about 1,363 kWh a year, 0.2% below the Virginia median. Power here comes from Dominion or REC or SVEC or HEC; the numbers below use the Dominion rate of 15.20¢ per kWh (2025 average). Your bill shows which one serves you.

1,363

kWh / kW / year

PVWatts, south-facing

4.90

Peak sun hours / day

annual average irradiance

10,904

kWh / yr from 8 kW

a common home system

15.20¢

Dominion price

2025 residential avg

Monthly solar production per kW in Timberville, VirginiaKilowatt-hours per month for a 1 kW south-facing system. Peak in Jul, low in Dec.050100150Jan90Feb89Mar121Apr129May136Jun136Jul136Aug129Sep112Oct112Nov93Dec82
NREL PVWatts v8, 1 kW DC, fixed roof mount, azimuth 180°, tilt 25°, 14% losses. Jul makes about 1.7× Dec.

Seasonality

Monthly solar production in Timberville

Virginia net metering carries excess credits forward for 12 months, so Jul's surplus offsets Dec's shortfall. Systems are sized to annual usage rather than to the lowest month. How the calculator models net metering; the current rules by utility are on this Virginia incentives page, maintained by the installer behind this site.

Capacity factor: 15.6%. Elevation about 354 m. Compare every town on the city list, or see how roof direction, tilt and shade change the number.

Payback in Timberville

Solar cost and payback for an average home in Timberville

Assumes 1,038 kWh a month (≈ $158) at Dominion Energy's 2025 average price, Timberville's PVWatts production, 3% annual rate growth and $2.78/W installed, no federal credit. Dollars are nominal. Change any of it in the calculator, or compare every utility in Are solar panels worth it in Virginia?

Run it with your bill

9.1 kW

System size

$25,298

Est. cost

$2,066

Year-1 savings

11.2 yrs

Break-even

$61,672

25-yr savings

$36,374

Net benefit

undiscounted

Utility

Electric utilities serving Rockingham County

Rockingham County is split between utilities. Rates are calendar-year averages; see all Virginia utilities for the full table.

UtilityTypeAvg price ¢/kWhAvg kWh / monthData year
Dominion EnergyInvestor-owned utility15.201,0382025*
Rappahannock Electric CooperativeElectric cooperative15.491,1952025*
Shenandoah Valley Electric CooperativeElectric cooperative14.491,2002025*
Harrisonburg Electric CommissionMunicipal utility11.519742025*

Questions

Questions about solar in Timberville

How much electricity does a solar system produce in Timberville?
About 1,363 kWh per year for every kilowatt of panels on a south-facing roof, according to NREL's PVWatts. An 8 kW system would make roughly 10,904 kWh a year. East- or west-facing roofs make less; the calculator applies those factors.
Who is the electric utility in Timberville?
EIA's service-territory data lists Dominion Energy and Rappahannock Electric Cooperative and Shenandoah Valley Electric Cooperative and Harrisonburg Electric Commission for Rockingham County. Boundaries run through the locality; your bill shows which one serves you. Dominion's 2025 average residential price was 15.20¢ per kWh.
Is solar worth it in Timberville?
For an average Dominion home (1,038 kWh a month), the default assumptions give a 9.1 kW system costing about $25,298 with a break-even around 11.2 years and $36,374 net benefit (nominal) over 25 years. Your bill, roof and shade change that; the calculator lets you enter them. The statewide picture is in “Is solar worth it in Virginia?”.
Where does the sun data come from?
NREL PVWatts v8 (8.5.0), using the 1093415.csv typical-year weather dataset for grid cell 1093415, about 2 km from the town center. Inputs: 1 kW DC, fixed roof mount, 180° azimuth, 25° tilt, 14% system losses. Typical-year data doesn't change year to year.

Solar production in towns near Timberville

Sources: NREL PVWatts v8 (8.5.0, typical-year weather); EIA Form 861 2025 utility data and service territories; U.S. Census Bureau place coordinates. Formulas and assumptions on the methodology page.