To provide an optical shutter for improved photovoltaic array thermal performance.

A photovoltaic array with improved thermal performance includes a photovoltaic array, an electro-optic shutter disposed on the photovoltaic array, and a control system connected to at least the electro-optic shutter. The control system, based upon input from a sensor, switches the electro-optic shutter between transmissive and reflective conditions so as to control exposure of light to the photovoltaic array.