The angle and direction of the roof does not have any high impact on the overall output today, thanks to the advanced technology. However, it is not sensible to install panels on very steep panes facing north-west, north or north-east. With regard to the maximum output, the optimum orientation is towards the south with about 1:2 roof. The output starts to fall as the angle or the direction changes. With panes facing east and west, gently sloping roofs are clearly better than steeply sloping ones, as the panels are able to obtain light in a very broad angle.
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