Solar Panels

Solar panels usually refer to the solar collectors that are intended to collect heat (as opposed to photovoltaic technologies which convert sunlight into electrical power). The collected solar heat is typically used to heat water for use in building heating systems or industrial or technical applications.

There are various kinds of solar thermal collectors but most require a flat glass cover, or glazing, which serves not only to protect the panel while letting the sunlight through but also to prevent cooling of the panel from exposure to cold air.