This study proposes using a 15-level cross-connected sources-based multilevel inverter (CCS-MLI) to apply in photovoltaic (PV) power generation. The inverter topology is realized with ten active switches and four DC sources. The CCS-based multilevel inverter produces an output voltage waveform with fifteen levels, while the DC source voltages are maintained at appropriate levels. A high-frequency control method called multi-carrier pulse width modulation (MCPWM) is proposed to control the switching states of the 15-level CCS-MLI. All the carriers remain in phase when the equal frequency approach of Phase Disposition (PD) is used. The simulation is performed using the MATLAB/Simulink environment. The simulation outcomes illustrate that MCPWM with the PD technique can significantly reduce the total harmonic distortion (THD) in the output of 15-level CCS-MLI. Moreover, the effectiveness of the topology & its control is verified with resistive and inductive loads. The system is further simulated for variable load, modulation index, and frequency to validate the dynamic performance for industrial applications. The superior harmonic profile and stable dynamic performance indicate the suitability of the designed system as a solar inverter for standalone or grid-tied applications.