How Many Peak Sun Hours in Maryland? (Winter vs. Summer)
Spoke ArticleMaryland1 min readVerified Q1 · 2026

How Many Peak Sun Hours in Maryland? (Winter vs. Summer)

SBI Editorial DeskUpdated Q1 · 20262 sections

Many homeowners worry that Maryland's cloudy days and cold coastal winters 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 Maryland Solar Reality

Maryland receives an average of 4 to 4.5 peak sun hours per day. While this is lower than desert states, it 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.

Commercial rooftop deployment — high-density bifacial array
Fig · 01Commercial rooftop deployment — high-density bifacial array
02

Maximizing the Net Metering Cycle

During the long days of July and August, your panels will vastly overproduce. Thanks to Maryland'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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