Abstract: Various systems, processes, and techniques may be used for converting alternating current power to direct current power for an electro-chemical reactor. In certain implementations, a system and a process may include the ability to receive an alternating current power signal, convert the alternating current signal to a direct current signal, and distribute the direct current signal to at least two power conversion modules coupled to a mounting structure. Each power conversion module may be able to convert a portion of the direct current signal to a high-frequency alternating current signal, adjust the voltage of the high-frequency alternating current signal, convert the voltage-adjusted high-frequency alternating current signal to a direct current power signal, and filter the direct current power signal. The system and the process may include the ability to combine the direct current power signals from the modules into an output direct current power signal for an electro-chemical reactor.