A photovoltaic module assembly for non-penetrating installation to a substantially flat surface, the assembly comprising: a photovoltaic module including: a device including a photovoltaic laminate, a frame assembled to the photovoltaic laminate, the frame including: framework encompassing a perimeter of the photovoltaic laminate and having a trailing frame member, a first support arm extending from the framework and beyond the trailing frame member, the first support arm forming a first seat; a deflector defining a front face and a rear face; and a clip extending from one of the frame and the rear face of the deflector; wherein the assembly is configured to provide a first mounted state in which the deflector is nested within the first seat and is releasably mounted to the trailing frame member via the clip, the first seat includes side walls forming a slot sized to frictionally receive a portion of the deflector; wherein the first support arm further forms a second seat for frictionally receiving a portion of the deflector, the second seat being longitudinally disposed between the trailing frame member and the first seat a, and wherein the deflector includes opposing, first and second sides (124,126) and opposing, first and second ends (128,130); the first mounted state includes a portion of the first end disposed within the first seat; and the assembly is configured to provide a second mounted state in which a portion of the second end is disposed within the second seat and the deflector is releasably mounted to the trailing frame member via the clip. a photovoltaic module including: a device including a photovoltaic laminate, a frame assembled to the photovoltaic laminate, the frame including: framework encompassing a perimeter of the photovoltaic laminate and having a trailing frame member, a first support arm extending from the framework and beyond the trailing frame member, the first support arm forming a first seat; a deflector defining a front face and a rear face; and a clip extending from one of the frame and the rear face of the deflector; a device including a photovoltaic laminate, a frame assembled to the photovoltaic laminate, the frame including: framework encompassing a perimeter of the photovoltaic laminate and having a trailing frame member, a first support arm extending from the framework and beyond the trailing frame member, the first support arm forming a first seat; a deflector defining a front face and a rear face; and a clip extending from one of the frame and the rear face of the deflector; framework encompassing a perimeter of the photovoltaic laminate and having a trailing frame member, a first support arm extending from the framework and beyond the trailing frame member, the first support arm forming a first seat; a deflector defining a front face and a rear face; and a clip extending from one of the frame and the rear face of the deflector; wherein the assembly is configured to provide a first mounted state in which the deflector is nested within the first seat and is releasably mounted to the trailing frame member via the clip, the first seat includes side walls forming a slot sized to frictionally receive a portion of the deflector; wherein the first support arm further forms a second seat for frictionally receiving a portion of the deflector, the second seat being longitudinally disposed between the trailing frame member and the first seat a, and wherein the deflector includes opposing, first and second sides (124,126) and opposing, first and second ends (128,130);