An adjustable solar-power unit to power a dispenser includes a support housing maintaining a receiving aperture to rotatably retain a solar panel carrying holder therein. The adjustable solar-power unit is configured to be mounted remotely from the dispenser or may be configured to be integral with a housing that maintains the components of the dispenser. The holder may be rotated or pivoted so that the angle of incidence of the ambient light can be substantially perpendicular with that of the solar elements carried by the holder to generate an optimal amount of electrical power therefrom in order to power the dispenser.