The interleaved Boost resonant converter is a well-known topology for applications requiring high step-up ratios, such as photovoltaic (PV) applications. It features its step-up capability, low input current ripple, and soft-switching characteristics. Nevertheless, designing Boost inductors presents challenges. If the Boost inductance is too large, it results in a significant DC component in the inductor current, making it challenging to achieve soft switching on the low-voltage side. Conversely, if the Boost inductance is too small, it leads to a large peak-to-peak boost inductor current, increasing magnetic core losses. There is also a trade-off between boost inductors and magnetizing inductance, impacting conduction loss. This paper addresses these challenges by introducing an auxiliary inductor that facilitates full-range soft-switching. Although the auxiliary inductor will bring losses, it is possible to reduce the overall system loss based on the overall system loss. Additionally, the implementation of a quadruple rectifier reduces diode voltage stress, decreasing costs and diode losses. It also contributes to a low turn ratio transformer and reduced transformer size as well as losses. Finally, a 330W prototype operating with input voltage ranging from 44V to 66V and an output between 250V and 440V is presented to validate the proposed concept.