A power conversion apparatus includes: a first power terminal; a switching circuit including a first switching device on a path coupling a first power node to a first node, a second switching device on a path coupling the first node to a second power node, a third switching device on a path coupling the first power node to a second node, and a fourth switching device on a path coupling the second node to the second power node; a transformer including a first winding coupled to the switching circuit and a second winding; a rectifier circuit; a second power terminal; and a controller that controls operations of the switching circuit and the rectifier circuit to supply power from the second power terminal toward the first power terminal during a predetermined period different from a period during which power is supplied from the first power terminal toward the second power terminal.