Novato Solar Power Information & Peak Sun Hours
Solar Green Energy Summary for Novato, California
Lattitude: 38.092
Sunlight
Fixed Tilt Sunlight Hours: 5.6 hours per day
1-Axis Tilt Sunlight Hours: 7.3 hours per day
2-Axis Tilt Sunlight Hours: 7.8 hours per day
Peak sun hours are a vital measurement to understand when considering the installation of solar panels. Peak sun hours are not the same as total sunlight hours because not every hour of sunlight during the day has enough strength and solar insolation to qualify as a peak sun hour. The rule of thumb is that a peak sun hour is when the intensity of the sun that is hitting your solar panel is providing at least 1,000 watts per square meter. This is an arbitrary number, but it is a number where most solar panels will be producing an efficient output and not underperforming due to sunshine that is not strong enough or direct enough.
The latitude at the equator of the earth is zero degrees. This is where sunlight strikes the earth most directly. Due to the earth's curved shape, sunlight hits at a various angles depending on location. As latitude increases, the further you are located from the equator and more variance you see in sunlight hours. The latitude of Novato is 38.1.
Throughout the day the sun obviously moves throughout the Novato sky. The suns position in the sky also changes throughout the year with the seasons. A fixed solar panel does not accommodate for these changes. However, a 1-axis panel rotates and follows the sun’s path during the day. A 2-axis panel both follows the sun’s daily path as well as the seasonal differences
The sunrise and sunset is very predictable every day, but things like cloud coverage and weather are less predictable and vary daily and annually. If a location that is usually very sunny experiences a huge increase in storms and cloud coverage in a given year than the average peak sun hours for that day or year will probably decrease. Tall objects such as trees and buildings can block out the sun during high solar insolation times, so be sure to strategically place your solar panels to get better efficiency.
We can use previous years of data to estimate the amount of peak sun hours in Novato. A fixed tilt mount for example will receive 5.6 average hours per day. For more efficiency for your system in Novato you could use a 1-axis tracking mount and increase your daily peak sun average to 7.3 hours, or even further with a 2-axis panel to get an average of 7.8 hours.