How Many Solar Panels in Idaho?
A typical Idaho household using 10,500 kWh a year needs about 19 panels — a 7.5 kW system. That is 1 fewer than the national average.
Panels needed
19
13 of 51 states, fewest first
System size
7.5 kW
Roof space
342 sq ft
Peak sun hours
4.8 / 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 Idaho
At 4.8 peak sun hours a day, Idaho sits close to the national average. Each kilowatt delivers about 1,402 kWh a year.
Roof space is usually the binding constraint rather than budget. The 342 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 Idaho? →