Why The Program Does Simulate With A Different Module Tilt Than Defined?

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Why the program does simulate with a different module tilt than defined?

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The module orientation and angle has two influencing factors, the module mounting angle and the roof pitch. Both together then give a resulting module inclination and orientation.

 

It can be illustrated as follows:

 

If you put a ball on the module surface, then it will not just roll in the direction of the mounting angle. Because of the roof slope it will roll in a direction between the module mounting orientation and the orientation of the roof. This is the resulting module orientation. The greater the roof pitch, the greater the deviation of the resulting module orientation from the orientation of the mounting system.

For example: On an tilted roof with a western orientation you have installed a mounting system which is elevated to the south. Then the ball will roll not to the south but to the southwest.