This article presents a novel four-port DC–DC converter designed to integrate photovoltaics, fuel cells, and supercapacitors with one DC charging single-output port with a reduced component count. The proposed converter ensures an efficient power management strategy to manage the load power demand and optimize the power flow from the sources. The power management controller helps enhance the performance of the system by dynamically prioritizing the sources based on their availability and the demand of the load. A comprehensive reliability analysis is conducted to measure the converter’s robustness under varying load conditions, proving its suitability for real-world applications. The proposed topology’s performance was validated in three different scenarios for 1 kW using a simulation tool, and experiments in the laboratory were conducted. The failure rate and efficiency of the system are analyzed, and the converter promises a 96.5% efficiency for 1 kW and a failure rate of 4.6216 × 10⁶ failures per hour. The simulation and experimental results validate the converter’s performance, highlighting its superior efficiency, reliability, and scalability.

This paper introduces a novel hybrid multiport converter (MPC) for water irrigation systems. The proposed MPC is characterized by its simplicity and the ability to maintain a consistent DC‐link voltage. A power management technique has been developed to ensure the maximum power utilization sources even if either one of the sources is absent and simultaneously manages power demanded by the load. This technique facilitates active power sharing, rapid output voltage control, and handling the load disturbances. The proposed converter’s performance is assessed through simulation tools and experimental validation for a 1‐kW system, considering three different scenarios. Thus, the proposed converter achieves high gain, high efficiency of 96%, and faster dynamic response.

This work introduces an improved methodology for detecting the fault in the MOSFET switch used in the dual input fault tolerant (DIFT) DC-DC converter for DC microgrid application. The converter uses both photovoltaic (PV) and fuel cell (FC) sources to make sure that power is constantly available to load. DIFT predict the inductor current and compare it with actual inductor current and gives the result whether fault is present in the switch or not. We also use the FIDES method to find the failure rate of all the components under real-world stress situations, such the temperature and humidity changes that occurs all the time in Chennai. Based on FIDES reliability studies, the switch S3 which is prone to failure is found. If the fault switch is S3 with the help of S3R the demand in the load is maintained. This lets the converter keep working without faulted switch and this is how the output voltage is managed. The suggested way to diagnose can find and fix OC fault in the switch in just one switching cycle (20 μs). It can do the same thing for SC faults in four switching cycles (80 μs).