There are two methods for calculating the tilt angle for solar panels.
Proper solar panel angle.
The optimum tilt angle is calculated by adding 15 degrees to your latitude during winter and subtracting 15 degrees from your latitude during summer.
While the angle of your solar panels is important a more important factor in your energy production is going to be the direction your panels face.
For instance if your latitude.
Since solar panels are more productive when the sun s rays are perpendicular to their surfaces the certainly best orientation is the one directly true south azimuth angle 180.
Similarly you can calculate the angle for winter by adding 15.
For instance if your latitude is 34 the optimum tilt angle for your solar panels during winter will be 34 15 49.
Whatever your latitude is you can subtract 15 from it to calculate the angle for summer.
Here two simple methods for calculating approximate solar panel angle according to your latitude.
Both of these angles require latitude degrees.
On the contrary in the countries of the southern hemisphere such as south africa and australia the best orientation is true north.