Some times to increase the isolation of the greenhouse (to reduce the heat losses) we apply both screens during the night. In this case we use both energy and shading screen for saving energy purposes. Most of modern greenhouse controllers have this option, to use both screens for both options. From a climate controller we can see that the shading screen has a value of 1 (which means closed or applied) at the same time when the energy screen is also 1. This depends on the configuration of the climate controller.

has energy screen usage