How Many Solar Panels in Virginia?
A typical Virginia household using 10,500 kWh a year needs about 20 panels — a 8.0 kW system.
Panels needed
20
25 of 51 states, fewest first
System size
8.0 kW
Roof space
360 sq ft
Peak sun hours
4.5 / day
Based on 400W panels and 10,500 kWh a year. Your own bill will differ — put your figure into the calculator.
What drives the number in Virginia
At 4.5 peak sun hours a day, Virginia sits close to the national average. Each kilowatt delivers about 1,314 kWh a year.
Roof space is usually the binding constraint rather than budget. The 360 square feet above is usable south-facing area — chimneys, vents, dormers and north-facing slopes do not count towards it.
How long would that system take to pay for itself in Virginia? →