Power optimizer in Thanjavur Sri Saravanas Agencies A power optimizer is a type of Module-Level Power Electronics (MLPE) used in solar photovoltaic (PV) systems. Its primary function is to maximize the energy harvest from each individual solar panel by continuously optimizing its performance. It sits directly on the back of each solar panel, or is integrated into the panel itself. Unlike traditional string inverters that treat all panels in a series string as a single unit, a power optimizer works at the individual module level.