The growing demand for photovoltaic (PV) systems with integrated energy storage poses challenges for power conditioning, often requiring multiple converters that increase cost, complexity, and losses. Multiport resonant converters have emerged as an efficient alternative by integrating PV modules, energy storage systems (ESSs), and a DC bus within a single topology. The triple active bridge (TAB) is the most common solution, but its high semiconductor count raises costs and reduces efficiency. This paper proposes a simplified three‐port LLC resonant converter tailored for standalone PV–ESS applications, where only the battery port requires bidirectional operation. A major contribution to this work is demonstrating that a three‐port LLC resonant converter with a reduced number of switches can achieve competitive performance while simplifying implementation. In particular, the use of a Class D amplifier in the PV port and a two‐diode rectifier in the DC bus port enabled a reduction in both component count and conduction losses, without compromising the converter’s flexibility for renewable energy applications. The topology reduces the number of semiconductor devices compared to TAB converters while maintaining galvanic isolation and soft‐switching capability. The design was validated through analytical modeling, SPICE simulations, and a laboratory prototype operating in four modes. Experimental results confirmed stable resonant operation with efficiencies above 88% in all modes, reaching up to 90.1% with SiC MOSFETs. The results demonstrate that the proposed topology combines reduced complexity, competitive performance, and high efficiency, making it suitable for standalone renewable energy systems with integrated storage.

Computational analysis using PSpice has become an indispensable tool for evaluating power electronics circuits, as it allows accurate simulation of transient effects, ripple, and component dynamics, enabling reliable assessment of complex topologies before physical implementation. In single-phase systems, electrolytic components are commonly used due to their high energy density, which helps mitigate low-frequency ripple caused by power oscillations between the DC and AC sides. However, these components have a limited lifespan, which compromises the system’s long-term reliability. This work proposes and evaluates the Stacked Switched Capacitor (SSC) topology as a power decoupling technique, implemented within a 200 W Cuk converter. The proposed SSC design enables a substantial reduction in required capacitance, replacing a conventional 600 μF capacitor with only three 36 μF capacitors, while maintaining voltage stability and output power performance. Simulation results show a high efficiency of 94% and a DC-link energy of 0.992 J, confirming the SSC’s ability to effectively mitigate voltage ripple at twice the grid angular frequency (2ω, rad/s) without compromising system durability. Comparative analysis with conventional decoupling strategies demonstrates that the SSC topology offers a compact, efficient, and reliable alternative, reducing the number of required passive components and switching devices. These results provide a strong basis for further exploration of SSC-based designs in space- and cost-constrained single-phase DC-AC applications.

This study evaluates the technical feasibility of an autonomous photovoltaic pumping system for agricultural use in isolated communities, using a representative region of the Mixteca Poblana, Mexico, as a case study. A reference sizing methodology reported in the literature was adopted for the sizing of isolated systems, and subsequently enhanced through a structured methodological extension, applied in the final stage of the design, focused on the technical validation and commercial selection of system components. The base framework incorporates site characterization and crop selection criteria. Subsequent stages define the hydraulic and electrical design requirements for the extension of the methodology, such as the calculation of water demand, the determination of pump power, and the estimation of energy requirements. These parameters enable the integrated correlation between hydraulic demand and electrical system constraints in the selection of the main system components, including the pump, photovoltaic array, battery storage system, water storage tank, and inverter. The technical robustness of the combined approach was validated through a simulation performed using specialized solar pumping software, confirming the operational feasibility and replication potential in rural communities with similar conditions.