Two types of mounting systems were used here. The Tree-system substructure is knocked into the ground at a certain angle, preventing the system from blowing away and leaking the impermeable layer. On the upper part of the mountain is a flat-roof system. The temporary covering layer that is there now will be replaced by a permanent layer in the future. The PV system will then have to be removed temporarily. A flat-roof system is then easier to remove than a system anchored in the ground.