Livingston Solar Power Information & Peak Sun Hours
Solar Green Energy Summary for Livingston, Illinois
Lattitude: 38.9682
Sunlight
Fixed Tilt Sunlight Hours: 4.9 hours per day
1-Axis Tilt Sunlight Hours: 5.6 hours per day
2-Axis Tilt Sunlight Hours: 6.1 hours per day
The average amount of peak sun hours in a day is a different and more useful number as it relates to solar panels than total sun hours. Total sun hours are exactly what you would expect; the total amount of hours that the sun is out during a 24 hour period. Peak sun hours, on the other hand, are the total number of hours in a day where the sunshine is strong enough to to be absorbed and used by solar panels. Sunlight early in the morning or late at night is often not strong enough to count toward peak sun hours. Because of this, total sun hours will always be more than peak sun hours. Looking at the average peak sun hours in Livingston throughout the year can help you better estimate the amount of solar panels you will need to power your business or home.
The equator has a latitude of zero while Livingston has a latitude of 39.0. Any city located on the equator will receive the most sunlight throughout the year because the sunlight arrives at a perpendicular 90 degree angle to the earth at the equator. The further you are from the equator the more your daily sunlight hours can vary.
A tracking mount will increase the average peak sun hours for a solar power system. Think about a panel that is tracking the sun in the sky vs a panel that is fixed and not moving: you will see a higher efficiency ratio of productions. A 1-axis mount will track the sun from East to West from sunrise to sunset and move on a single axis of rotation. A 2-axis mount will track the Sun from East to West the same as a 1-axis mount would, but it will also track the angle of the sun in the sky as it slowly varies season to season. A 2-axis mount is more necessary in high latitude regions where the angle of the sun in the sky changes dramatically between each equinox.
Another reason to consider average peak sun hours is because weather can dramatically affect the day-to-day output of solar panels. It goes without saying that a dark stormy day will produce less output than a clear sunny day. Looking at a yearly average helps account for these daily variables.
We can use previous years of data to estimate the amount of peak sun hours in Livingston. A fixed tilt mount for example will receive 4.9 average hours per day. For more efficiency for your system in Livingston you could use a 1-axis tracking mount and increase your daily peak sun average to 5.6 hours, or even further with a 2-axis panel to get an average of 6.1 hours.