Power optimizers are DC/DC converters connected to each solar module to turn it into "smart" modules. Power optimizers increase the energy output of PV systems by continuously tracking the Maximum Power Point (MPP) of each solar module individually. Maximum Power Point Tracking (MPPT) per solar module allows flexible installation design with multiple orientations, tilt angles and module types in the same string. In addition, power optimizers monitor the performance of each module and communicate the performance data to a monitoring platform for enhanced, cost-effective panel-level maintenance. We offer SolarEdge- and Huawei optimizers.