Water treatment device (1), in particular for desalinizing and / or distilling and / or purifying water, through
solar energy, wherein the device (1) comprises a support structure (2) having at least a first surface (5) and a second surface (6) extending between an upper part (3) and a base (4) of the support structure (2), at least one photovoltaic element (7) transparent to
infrared radiation which is connected to the support structure (2) at the first surface (5), wherein the photovoltaic element (7) is part of a photovoltaic circuit (22) for the generation and storage of electrical energy, at least one condensation plane (8) connected to the support structure (2) at the second surface (6), wherein the condensation plane (8) comprises a duct (9) for receiving water to be treated and for leading a residue of
treated water to the base (4) of the support structure (2), a collection tank (17) for collecting the
condensed water on the condensation plane (8), at least one hydraulic apparatus (14) connected to and powered by the photovoltaic circuit (22) to regulate the flow of the water to be treated, and a
control unit (18) connected to at least the photovoltaic circuit (22) and the hydraulic apparatus (14).