A control system for a plurality of electrochromic elements, for example, used in automobiles, to control the glare of the IEC elements used as a rearview mirror (20) as well as the OEC elements (24, 26) used as sideview mirrors (24, 26). The drive circuits for the OEC's elements may be customized to account for various factors such as the type of curvature as well as the size, vehicle glass characteristics, such as tinting, operating temperature and shape.