I don't think so.Light seems to have all the energy, I never seen solar panel work in the dark It would be a first for me
If anything shadows are absent of energy they drain energy. In fact , you get depressed if you stay out of sunlight for a long time SAD (Seasonal Affective Disorder) As A Result of the Lack of Sunlight? | Serendip's Exchange shadows drain your "spiritual energy" if you will.