Prevent solar panel microcracks by stacking pallets no more than 2 high on level ground, transporting panels vertically, carrying modules with 2 people by the frame only, never walking on panels, and commissioning electroluminescence imaging before accepting delivery and after. Prevent solar panel microcracks by stacking pallets no more than 2 high on level ground, transporting panels vertically, carrying modules with 2 people by the frame only, never walking on panels, and commissioning electroluminescence imaging before accepting delivery and after. Our Slide & Stack System is designed to accommodate multiple panels and typically ranges in sizes over 48 inches wide. While the wall is open, the panels stack into a parking bay. Panel parking bays can be parallel or perpendicular to the track, feature multiple bays, exist at one or both ends of the. The concept of a tandem solar cell is that you stack multiple solar together, each tuned to different wavelengths of light. The idea is that by using different semiconductor materials for the different cells, you can generate electricity more efficiently from different wavelengths of light.