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.
Ideal roof angle for solar panels.
Forbes cited one study that had bloggers questioning whether panels should really face west.
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.
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.
However pitch angles between 30 and 45 degrees will work well in most situations.
On the contrary in the countries of the southern hemisphere such as south africa and australia the best orientation is true north.