Photovoltaic has double glass components and

Glass-glass PV modules, also known as double glass solar panels, are photovoltaic modules encapsulated with tempered glass on both the front and back sides. Compared to traditional glass-backsheet modules, they offer greater durability and environmental resistance. [pdf]

Sunroom double glass components

A truly insulated sunroom is built using double-pane glass - never single pane glass. Between the layers of glass is usually an inert gas such as Argon, which provides a barrier to insulate the room from outsi. [pdf]