Rockford Solar Power Information & Peak Sun Hours
Solar Green Energy Summary for Rockford, Washington
Lattitude: 47.4512
Sunlight
Fixed Tilt Sunlight Hours: 3.8 hours per day
1-Axis Tilt Sunlight Hours: 5.3 hours per day
2-Axis Tilt Sunlight Hours: 6.1 hours per day
Looking at the average peak sunlight hours in Rockford is a valuable number for determining your solar power setup. Peak sunlight hours are only the hours a day in which the sunlight is strong enough for the solar panels to do their job. Not every hour of sunlight was created equal. For example, solar panels do not provide much use during early sunrise and sunset, and therefore you should not look at total hours of sunlight in a day, but instead focus on peak sunlight hours. Using this number will provide a much better estimate of your needs for setting up panels in Rockford, Washington.
The equator has a latitude of zero while Rockford has a latitude of 47.5. 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.
You will notice that the average peak sun hours for Rockford change based on the type of panel being used. The reason for this is quite simple. A fixed panel does exactly what it sounds like, remains fixed in one position at all times. A 1-axis and 2-axis panels have axis that allow them to rotate. The 1-axis rotates with the sun's daily east to west movement while a 2-axis also adjusts for seasonal changes.
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 Rockford. A fixed tilt mount for example will receive 3.8 average hours per day. For more efficiency for your system in Rockford you could use a 1-axis tracking mount and increase your daily peak sun average to 5.3 hours, or even further with a 2-axis panel to get an average of 6.1 hours.