How Many Solar Panels in Alabama?
A typical Alabama household using 10,500 kWh a year needs about 20 panels — a 7.8 kW system.
Panels needed
20
20 of 51 states, fewest first
System size
7.8 kW
Roof space
360 sq ft
Peak sun hours
4.6 / 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 Alabama
At 4.6 peak sun hours a day, Alabama sits close to the national average. Each kilowatt delivers about 1,343 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 Alabama? →