This work presents a comprehensive analysis of AC Voltage Controllers, focusing on their performance in regulating power output for various loads. The study explores the principles of operation, control techniques, and their application in power electronics. Detailed experimental evaluations are conducted to assess the efficiency, power quality, and stability of the AC Voltage Controllers under different operating conditions. The results provide insights into optimizing controller design for improved performance in industrial and domestic applications, highlighting key advantages such as energy savings, voltage regulation, and harmonic mitigation.