However pitch angles between 30 and 45 degrees will work well in most situations.
Ideal roof angle for solar panels.
If you are trying to install solar panels on a steep roof it may not be possible to place panels at the optimal tilt with traditional racking systems.
Many roofs are going to have slopes between 30 and 40 degrees which means that solar panels can lie flush against the roof and produce enough electricity for attractive returns.
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.
Ideally a fixed roof mounted solar energy system should be at an angle that is equal to the latitude of the location where it is installed.
While it s true they should face south for the best results a west facing system would have produced 49 percent more electricity during the peak demand hours of the summer months than a south facing system.