Rohnert Park Solar Power Information & Peak Sun Hours
Solar Green Energy Summary for Rohnert Park, California
Lattitude: 38.348
Sunlight
Fixed Tilt Sunlight Hours: 5.9 hours per day
1-Axis Tilt Sunlight Hours: 6.6 hours per day
2-Axis Tilt Sunlight Hours: 8.3 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 Rohnert Park throughout the year can help you better estimate the amount of solar panels you will need to power your business or home.
Knowing that the latitude of Rohnert Park is 38.3 can be helpful for understanding total sunlight hour variance. As you approach the equator latitude approaches zero. The closer the latitude is to zero, the more consistent the daily sunlight hours are throughout the year. Total sunlight hour consistency simply makes planning for your solar power needs easier, but it is certainly not a requirement.
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.
Climate in your geographical region is a major factor that will influence average peak sun hours per year. If you live in a region that does not have a lot of completely sunny days, then cloud coverage will greatly influence solar insolation on any given day. Mountains and trees may also contribute to lower solar insolation if they block the sun from your panels at any given point of the day.
Since we know the latitude of Rohnert Park we can take the average amount of total sunlight hours and estimate that with a fixed solar panel there would be an average of 5.9 peak sun hours per day. 6.6 hours per day with a 1-axis tracking mount that tracks the sun from sunrise to sunset, and 8.3 hours with a 2-axis tracking mount that tracks the sun everywhere in the sky.