Diesel electrical generators are essential for providing reliable backup power during grid outages, ensuring the continuous operation of critical services such as hospitals, industries, and communication systems. These generators require instantaneous monitoring and control to optimize their performance and longevity. The Internet of Things facilitates efficient monitoring and enables remote control with a faster response time than human intervention, thereby helping to prevent potential damage or system failures. This research introduced the Internet of Things technology and its general architecture. The study first presented an abstract framework of IoT-based monitoring and controlling technology, divided into three layers: perception, network, and application. It then discussed the terminology related to electrical generators, the parameters monitored, and their operational environments. In addition, the advantages and challenges associated with integrating it with electrical generators were discussed. Finally, the research reviewed and analyzed several practical applications and case studies integrating IoT with diesel electrical generators, highlighting key challenges and proposing solutions. This work provided theoretical and practical insights into IoT-based monitoring and control systems for electrical generators.