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TyThis project focuses on designing and fabricating a SG3525 PWM inverter circuit that converts9 12V DC to a stable 220V AC with a frequency of 50Hz. The circuit can regulate output voltage and frequency by using PWM controller IC to meet diverse application demands such as lighting, fan, motor control, and uninterruptible power supply (UPS). The hardware implementation emphasizes reliability, efficiency, and safety to address challenges such as voltage instability and harmonic distortion, which could impact performance and application suitability. Previous switching circuits have always suffered from output voltage fluctuations, high power dissipation, and low efficiency due to inconsistent switching regulation or poor switching control. Furthermore, many designs are not appropriate for various applications, their practicality is limited. The project highlights practical considerations in hardware assembly, including component selection, PCB fabrication, and system testing. By transitioning from simulation to a physical prototype, this project aims to deliver a user-friendly, durable inverter capable of consistent voltage output and safe operation for diverse applications, such as renewable energy systems and portable power solutions. Key components include the SG3525 PWM controller, MOSFETs, transformers, capacitors, resistors, a lithium-ion battery, switches, and output loads like a fan and LED bulb. The completed inverter prototype demonstrates improved performance and adaptability, offering a reliable solution for home appliances. With continued enhancement, this design is ideal for market deployment, such as for portable power solutions, backup power sources, which contribute to sustainable energy advancement.