How Many Solar Panels in Wisconsin?
A typical Wisconsin household using 10,500 kWh a year needs about 22 panels — a 8.6 kW system. That is 2 more than the national average.
Panels needed
22
45 of 51 states, fewest first
System size
8.6 kW
Roof space
396 sq ft
Peak sun hours
4.2 / 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 Wisconsin
At 4.2 peak sun hours a day, Wisconsin sits close to the national average. Each kilowatt delivers about 1,226 kWh a year.
Roof space is usually the binding constraint rather than budget. The 396 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 Wisconsin? →