Strong understanding of device characteristics, gate driving circuit design, thermal design, magnetics design (inductors, transformers), power electronics topologies (AC/DC, DC/DC & DC/AC), modulation schemes, and control theories, including analog & digital circuits (MOSFETs, op-amps, regulators, microcontrollers, etc.). Tesla is leveraging its breakthrough firmware, electronics, test, and manufacturing capability to develop and deploy grid connected storage at residential, industrial, and utility levels.