This study describes the Space Vector Pulse Width Modulation (SVPWM) method for the Four-Switch Three-Phase Inverter (FSTPI). Based on the formation of fundamental space vectors and modulation techniques similar to the Six-Switch Three-Phase Inverter (SSTPI), the proposed SVPWM approach generates four voltage vectors. This method was developed to minimize the ripple content of both the output voltage and current. A four-switch three-phase inverter has the following benefits over a six-switch three-phase inverter: reduced conduction losses, less EMI, fewer switching losses, a simpler control scheme, and fewer interface circuits. The SSTP inverter divides the 𝛼𝛽 plane into six sectors, and the necessary reference voltage space vector is formed using effective (mean) vectors. This principle forms the basis of the space vector PWM algorithm for grid-connected Four-Switch Three-Phase Inverters (FSTPIs). By utilizing MATLAB/Simulink software, the performance of the FSTP inverter based on the switching patterns and reference voltage requirements can be easily optimized.