The key - is control
"The benefits of a solar shading system can only be harvested if the system is automatically controlled."
The benefits of a solar shading system in terms of improved indoor comfort, better visual comfort, energy savings and use of natural daylight can only be harvested if the system is automatically controlled. It will then work properly even when the occupant is absent and it will react to the sun and the wind without requiring any attention, which is important for the energy saving aspect.
(Source: REHVA)