This paper presents the design of a control circuit for a single-phase inverter capable of generating a pure sine wave output that is accurately aligned with the desired voltage amplitude and frequency. With the global shift toward renewable energy sources, the need for efficient and reliable power conversion systems has become more critical than ever. The proposed design utilizes advanced microcontroller technology along with modulation techniques such as Sinusoidal Pulse Width Modulation (SPWM) and Selective Harmonic Elimination (SHE). These techniques help achieve higher efficiency, significantly reduce harmonic distortion, and enhance the overall reliability of the inverter. This innovative approach contributes to improved energy efficiency and supports the development of smarter, more environmentally friendly power systems. The inverter is highly suitable for integration into solar energy systems, offering a stable and clean AC power supply for both residential and commercial applications. Its modular architecture also allows easy scalability to meet varying load demands and future upgrades.