Especially on green roofs the use of a photovoltaic system makes sense.
Why? The modules benefit from the cooling effect of low-growing plants. This is because they store water, which cools the environment when it evaporates, thus increasing performance and thus yield.
However, at the same time there are challenges compared to mounting on gravel or bitumen roofs: plants must not shade the photovoltaic modules and must be “kept at a distance”. Otherwise, they have the opposite effect and reduce the energy yield – and that considerably!
