I wouldn't do this in my place. Having a balcony already makes your interior less bright and "closed". Blocking sunlight (even compared to semi-opaque balustrad

I wouldn't do this in my place. Having a balcony already makes your interior less bright and "closed". Blocking sunlight (even compared to semi-opaque balustrades) would make it worse, for a final energy gain that is quite small compared to central electricity production.