DC–DC converter with multiple inputs and full isolated multi ports charging battery in photovoltaic energy systems

The need for functional photovoltaic systems with multiple inputs used in energy storage devices is increasing day by day. In addition to having sufficient performance, these units are a good alternative to integrated converters with their low costs. In terms of these advantages, a multi-port DC–DC converter is recommended for solar energy systems in this study. In this multi-pot system, each port has a specific purpose. Two of them are renewable sources, one is the battery set and the other is the load port. Although this topology is developed for standalone systems, it can be easily adapted to other different applications. The system can provide energy from each input source independently or by combining them, and any renewable source can be charged to extend the life of the battery set, whether discharged or charged. While the system can provide energy in some periods of time without the need for input sources or by combining all elements in the system, a different renewable source can also be used to extend the life of the discharged or charged battery set. A few extra features make the system superior to other existing systems; First of all, the PV source and battery are directed to the same point. Sometimes, only the solar cell charges the battery, providing safe grounding for both, and secondly, the output is isolated from other connection points. These advantages are given by comparing them with existing systems. The advantage that is different from other topologies is that the proposed method can continue battery charging in 3 ways with the switches reserved for PVs. The first is discontinuous mode, the second is semi-continuous mode and the third is continuous mode. This mode of operation is preferred according to the amount of energy received from the sun. In this way, it offers a functional charging capability. After the proposed system design and numerical studies, it is also applied experimentally. © Indian Academy of Sciences 2024.