Today’s energy ecosystem is engaged with numerous intelligent objects that are connected to the Internet leading to the network of smart connected things. This network is expanding day by day in response to the need for affordable, compact, and advanced energy infrastructure pursuing the key goal of improving energy services in societies. The great cumulation of Internet-connected objects paves the way for the emergence of the community of smart objects that is called the Internet of Things (IoT). The IoT eases virtually controlling energy processes in almost every domain of society. Hence, this technology is intended as one of the main tools for the realization of grid modernization schemes. As future energy grids are going toward fully renewable energy networks, the capable technologies are the essential requirements of the modern grid in providing sufficient flexibility for keeping its sustainability. When it comes to how to implement such technologies in practice, the immense potential of the IoT technology has made it as a strong contender for the feasibility of programs with advanced technologies. On the other hand, the integrated operation of energy networks due to the emergence of hybrid energy devices adds more complexities to the grid’s developments. Herein, IoT technology brings a widespread network of smart systems with a variety of capabilities, particularly in terms of networking, storage, and computing. This chapter wants to provide an overview of the key role of IoT in the energy management of future modern energy networks with a high/full share of renewable energy sources. Moreover, this chapter discusses the capability of IoT technology in improving synergies among different smart energy management devices.