On Board Charger for Lithium Battery 48V 300V 500V 10kW 20kW High Voltage EV Charging OBC Product Details The 20KW on-board charger is a high-power and high-efficiency charger specially developed for new lithium-ion electric logistics vehicles, buses, construction machinery and other new energy vehicles. It is designed and developed with modular, standardized and universal design ideas. The charger supports three-phase AC input and the DC output voltage can be adjustable.