NOVELTY - A power system comprises photo-voltaic cells arranged in solar panels; a parallel-wound direct current motor connected to a fan capable of forcing air through the IDEC apparatus; a diode interconnect device; and, electric wiring connecting the power sources of direct current and alternating current with the motor through the diode interconnect device to seamlessly power that motor from either or both power sources.    USE - For an indirect-direct evaporative cooling (IDEC) apparatus.    ADVANTAGE - The invention provides highly efficient system that supplies conditioned air to an interior space. It allows seamlessly drawing of operating power from multiple AC and DC sources. A unique combination of indirect stage heat exchanger plate coatings and water distribution manifolds enhances the operation of the IDEC apparatus used in the system.    DETAILED DESCRIPTION - A power system comprises photo-voltaic cells arranged in solar panels capable of supplying direct current (DC); alternating current (AC) supplied by a utility or other source); a parallel-wound direct current motor connected to a fan (41) capable of forcing air through indirect-direct evaporative cooling (IDEC) apparatus (10); a diode interconnect device; and, electric wiring connecting the power sources of direct current and alternating current with the motor through the diode interconnect device to seamlessly power that motor from either or both power sources.    INDEPENDENT CLAIMS are also included for:    (A) a hydrophilic coating for a heat exchange plate useable in the indirect evaporative cooling stage of indirect-direct evaporative cooling (IDEC) system comprising a flocked rayon-based material deposited on the plate;    (B) a fluid delivery device for releasing fluid useable for evaporative cooling of a gas is an evaporative cooling apparatus comprising a porous container for such fluid located above the evaporative cooling apparatus; and    (C) an indirect-direct evaporative cooling (IDEC) apparatus, comprising a unitary molded housing; an outside air entrance into the housing; a fan for moving outside air through the housing; a direct evaporative cooling stage within the housing for evaporative cooling of outside air; an indirect evaporative cooling stage within the housing for evaporative cooling of outside air comprising an array of multiple parallel plates, one side of the plate being wetted during operation and the other side being essentially dry; and U-shaped clamps arranged to selectively close portions of the parallel plates to create wet and dry passages through the plates.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the overall system for powering the evaporative cooling system for a sustainable energy source.    IDEC (10)    Cabinet (12)    Upper end (14)    Air inlet (16)    Rear (36)    Fan motor (40)    Fan (41)    Indirect cooling section (72)