How Many Peak Sun Hours in Virginia?
Spoke ArticleVirginia1 min readVerified Q1 · 2026

How Many Peak Sun Hours in Virginia?

SBI Editorial DeskUpdated Q1 · 20262 sections

Many homeowners worry that Virginia's four distinct seasons make solar inefficient. However, solar engineers measure viability in "peak sun hours"—the specific times when solar intensity reaches 1,000 watts per square meter.

01

The Mid-Atlantic Solar Reality

Virginia receives an average of 4.5 to 5 peak sun hours per day. This is an excellent level of solar irradiance and is more than enough to offset 100% of a home's electricity usage when the system is correctly designed. Solar panels are highly efficient in cool temperatures, meaning crisp, sunny winter days still yield significant production.

02

Maximizing the Net Metering Cycle

During the long days of July and August, your panels will vastly overproduce. Thanks to Virginia's 1:1 net metering laws, this excess summer power is credited to your account and covers the slight dip in production during the shorter, snowier days of January and February.

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