###### Abstract
The descriptions of each component are given and their input and output voltages for the simulation and experimental study are analyzed and their changes are observed. MLIs offer several advantages over conventional two-level inverters in a wide range of industrial applications due to their effectiveness, reduced switching losses, lower dv/dt stress, and diminished total harmonic distortion (THD). Various studies have been conducted to propose different MLI topologies, including cascaded H-bridge (CHB), flying capacitor (FC), and neutral-point clamped (NPC) converters [18; 19; 20; 21; 22]. Among these traditional MLIs, the PUC-based MLI represents a promising structure, as it combines the advantages of both CHB and FC configurations [23; 24]. [PERSON] proposed the PUC-based MLI for the first time in 2011 [25]. This novel MLI is composed of a single primary DC supply voltage for one level and capacitors for the higher levels [26]. Figure 1: The historical change in total installations [10; 11]. [PERSON] et al. designed a novel seven-level single-stage/phase grid-connected photovoltaic (PV) inverter based on a PUC topology with finite set model predictive control (FS-MPC). This innovative design is configured to work with PV panels producing an output voltage of 180 VDC. In this study, the authors converted the DC energy obtained from solar panels into 120 VAC energy using the seven-level PUC MLI. They claimed that the key benefit of the suggested approach is less complexity as an additional conversion stage is not required [27]. [PERSON] et al. introduced a sliding mode controller (SMC) specifically developed for a five-level PUC MLI, utilizing a voltage sensorless switching technique. The purpose of using a control modulation technique without using a voltage sensor is to make the control system simple and less expensive. The suggested switching technique can also stabilize the capacitor voltage of the PUC MLI. In the five-level PUC MLI simulation, the input voltage of the inverter was set to 100 VDC, which was obtained from PV. In addition, the capacitor value was 150 uF, the switching frequency was 1 kHz, and the RL load was 10 \(\Omega\), 45 mH [28]. [PERSON] et al. proposed and simulated an MPC-based scheme for a PUC-based grid-connected inverter for PV applications. The suggested approach employs a cost function optimization method to select the most suitable switching states for the PUC-based inverter. This enables the PUC inverter to achieve maximum power point tracking in PV arrays. Simulation results reveal that the suggested approach is capable of correctly regulating grid current injection as well as the PV array output voltage [29]. [PERSON] et al. suggested an optimized SMC system for switching control in PUC7 MLIs. This robust and versatile controller is designed to accomplish both capacitor self-voltage balance and current reference tracking concurrently in both grid-connected and stand-alone PUC7 inverters. The proposed DC-AC converter is designed for an input voltage of 160 VDC, a 900 uF capacitor, and a 2000 Hz switching frequency. Moreover, the SMC's extensive experimental and simulation results confirm the feasibility of properly controlling the PUC7 inverter even under dynamic modes, non-linear loads, and parameter mismatch [30]. In [31], [PERSON] et al. focused on reducing the harmonic content of the output voltage of a grid-connected seven-level PUC MLI. They conducted a power quality analysis of a seven-level three-phase PUC employing multi-carrier switching strategies. Additionally, this proposed system was three-phase. There were two solar PV arrays operating at different voltages on each phase. It was noted that no auxiliary capacitor was used to increase the level.