Calculation method one. The optimum tilt angle is calculated by adding 15 degrees to your latitude during winter, and subtracting 15 degrees from your latitude during summer. For instance, if your latitude is 34°, the optimum tilt angle for your solar panels during winter will be 34 + 15 = 49°.
http://sinovoltaics.com/learning-center/system-design/solar-panel-angle-tilt-calculation/
This is because the roundness of the tubes minimize the off-azimuth effect. The reduction in solar power density, if the panel is not square (not incident at 90°) to the sun’s rays, is a cosine function. For example if the angle is 80°, instead of 90°, the sun intensity is still 98% (i.e., cos10°).
https://www.solartubs.com/solar-collector-angle.html
Method 1: Quick and Easy (But Less Effective) Take your latitude and add 15 degrees for the winter, or subtract 15 degrees for the summer. For example: if your latitude is 40 degrees, the angle you want to tilt your panels in the winter is: 40 + 15 = 55 degrees. In the summer, it would be: 40 - 15 = 25 degrees.
http://www.solarpoweristhefuture.com/how-to-figure-correct-angle-for-solar-panels.shtml
Next you need to determine the angle of inclination you are going to utilize. This is the tilt angle whereby vertical is 90 degrees and horizontal is 0 degrees. This inclination angle will play a role in determining the performance during the seasons.
https://www.solartubs.com/solar-collector-angle.html
Read on to find out what to expect if you. adjust the tilt seasonally, or keep it fixed at the best angle for the year, or keep it fixed. at the best winter angle. Optimum Tilt for Winter. To calculate the best angle of tilt in the winter, take your latitude, multiply by 0.89, and add 24 degrees. The result is the angle from the horizontal at which the panel. should be tilted. This table gives the angle for some latitudes: Latitude Angle % of optimum.
http://www.alltrafficsolutions.com/SupportDocs/Optimum%20Orientation%20of%20Solar%20Panels.pdf
Method 2(c): The Better Way (Spring & Fall) Take your latitude and subtract 2.5 degrees. For example: if your latitude is 40 degrees, the best tilt for your panels in the spring & fall is: 40 - 2.5 = 37.5 degrees. Choosing the Right Tilt. You don't necessarily have to adjust the tilt of your panels every season.
http://www.solarpoweristhefuture.com/how-to-figure-correct-angle-for-solar-panels.shtml
Calculation method two. This is an improvement of the general method that gives better results. In this method, the optimum tilt angle for solar panels during winter is calculated by multiplying the latitude by 0.9 and then adding 29°. In the above case example of a latitude of 34°, the tilt angle will be (34 * 0.9) + 29 = 59.6°.
http://sinovoltaics.com/learning-center/system-design/solar-panel-angle-tilt-calculation/
To get the most from solar panels, point them in the direction that captures the most. sun. But there are a number of variables in figuring out the best direction. This page is. designed to help you find the best placement for your solar panels in your situation.
http://www.alltrafficsolutions.com/SupportDocs/Optimum%20Orientation%20of%20Solar%20Panels.pdf
When evaluating your own potential solar site, most likely your roof, it’s helpful to understand the particulars of your situation, such as the pitch, or angle, of the roof, as well as the direction that the intended surface faces, and to then relate that to the path of the sun through the sky during each of the four seasons.
https://cleantechnica.com/2015/11/12/what-is-the-best-angle-for-solar-panels/
The solar panel angle of your solar system is different depending on which part of the world you are. Solar panels give the highest energy output when they are directly facing the sun. The sun moves across the sky and will be low or high depending on the time of the day and the season.
http://sinovoltaics.com/learning-center/system-design/solar-panel-angle-tilt-calculation/
how to measure tilt angle of solar
The optimum tilt angle is calculated by adding 15 degrees to your latitude during winter, and subtracting 15 degrees from your latitude during summer.