I have an excel calculation which gives me the angles for the horizontal direction and vertical elevation to the sun, for a given time at given longitude/latitude coordinates.
I also know my solar collectors horizontal direction (194,5 degrees) and tilt angle (45 degrees). In other words, I can very easily count the relative horizontal angle between the solar collectors and the sun, likewise also the the vertical relative angle.
However, I'm interested to count the combined angle. What could be the equation for this?
Thanks in advance!