This paper proposes a new zero-current switching (ZCS) technique for three-level boost DC/DC converter. This new technique eliminates the switching loss and dv/dt noise due to the discharging of MOSFET’s junction capacitances and the reverse recovery of diodes and enables the converters to operate at high frequencies. Consequently, the total turn-off switching losses can be significantly reduced and as a result, a high switching frequency of the used switches can be actually realized. The size and weight of the devices are reduced as the heat sink is not required. The effectiveness of the proposed converter topology is provided for PV system by the simulat ion results and power loss analysis using the simulation software PSIM.