El Centro Solar Power Information & Peak Sun Hours
Solar Green Energy Summary for El Centro, California
Lattitude: 32.7873
Sunlight
Fixed Tilt Sunlight Hours: 6.4 hours per day
1-Axis Tilt Sunlight Hours: 7 hours per day
2-Axis Tilt Sunlight Hours: 8.6 hours per day
If you put your solar powered math calculator in your backpack it will turn off from the lack of sunlight needed to power the device. As you slowly open your backpack and begin to let sunlight in, the calculator will eventually turn on when the amount of sunlight is enough to power the calculator. Similarly, peak sun hours refer to the hours of they day where the sunlight is strong enough to power a solar panel. This is different from total sunlight hours, which is simply the amount of hours in a day when there is any sunlight.
Knowing the latitude of El Centro will help estimate average peak sun hours for your area. The latitude is used to accurately estimate the time of sunrise and sunset, thus giving you the total hours of daylight each day. Once you know the total hours of daylight, you can estimate the amount of peak sun hours based on a number of variables such as weather, time of year, the angle of the solar panel.
There are a few ways to increase average peak sun hours per year for your solar power system. One way is to use a tracking mount solar panel instead of a fixed tilt solar panel. A 1-axis mount will track the sun throughout the sky from sunrise to sunset, giving your panel a more efficient facing direction towards the sun throughout the day. A 2-axis solar panel will track the sun in the sky throughout the day, but also change and follow the angle of the sun in the sky throughout the year. Both of these axis system solar panels will produce higher average peak sun hours than a fixed solar panel.
There are more variables than latitude that can change average peak sun hours. Weather patterns and geography will influence solar insolation that reaches your system. Thick grey storm clouds for example will block out a lot of the sun to the point where there may be no peak sun hours in the middle of the day when the sun is usually very powerful. Trees and mountains can deflect the sunlight, so be sure your solar panel is selectively placed.
We can use previous years of data to estimate the amount of peak sun hours in El Centro. A fixed tilt mount for example will receive 6.4 average hours per day. For more efficiency for your system in El Centro you could use a 1-axis tracking mount and increase your daily peak sun average to 7 hours, or even further with a 2-axis panel to get an average of 8.6 hours.