Abstract: The present invention relates to a compact, fully integrated solar powered airconditioning (A/C) device for recycling and cooling the air inside buildings, which device comprises a photovoltaic (PV) solar cell, a Maximum Power Point Tracking (MPPT) Charge Controller, a battery unit and a vapor compression air cooling device.

Abstract: The present invention relates to a compact, fully integrated solar powered airconditioning (A/C) device for recycling and cooling the air inside buildings, which device comprises a photovoltaic (PV) solar cell, a Maximum Power Point Tracking (MPPT) Charge Controller, a battery unit and a vapor compression air cooling device.

Abstract: The invention relates to a solar air heater comprising—at least one transparent or translucent front panel comprising at least one first flow passage, said first flow passage substantially elongated and extending along the surface of the front panel,—a back panel preferably substantially parallel with the front panel,—at least one heat absorbing element, preferably located between the front panel and the back panel,—at least one air inlet,—at least one air outlet,—at least a second flow passage between the front panel and the heat absorption element, and—at least a third flow passage between the heat absorption element and the back panel, whereby air flowing through the solar air heater from an air inlet to an air outlet will pass at least a first, a second and a third flow passage.