The glass is set deep into the module frame and they are firmly attached to each other by silicone that is applied with continuous precision. This guarantees exceptional rigidity for the entire module and stops any possible loosening of the frame as a result of strong outward forces in cases such as sliding of heavy snow..To protect the cells from the most severe environmental conditions, they are encapsulated between a tempered glass cover and an EVA pottant with a PVF back sheet. The entire laminate is installed in an anodized aluminum frame for structural strength and ease of installation.Features: Kyocera's advanced cell processing technology and � less size panel. - covers the same area as the 120W panel but is more flexible in placement, especially where space is limited such as RV rooftop.- 12/24V option: Connect cables in parallel to form a 12V system or connect in series to form a 24V system. � less