Short answer: Yes, solar panels can work through glass, but the efficiency drops significantly. If you're thinking about installing solar panels indoors or behind a window, there are a few important technical and practical factors to understand before moving ahead. In this guide, we break down how. One that consistently comes up is the possibility of collecting solar energy through glass. In today's post, we explore if this is possible, its limitations and which solar technologies perform best with a glass barrier between them and the sun. Additionally, we will uncover what, if any, are the. Today solar panels come in all different shapes and sizes, have higher KW potentials, and can even be installed in your windows or behind clear glass. Maintenance and quality of glass are pivotal.