The worldwide energy production is majorly based on fossil fuels, and it covers 84% of world key energy consumption as on 2020 statistics. To support global energy demand, both government and private sectors have started to focus the problems on fossil fuel depletion and the impact of Greenhouse gas emissions in climatic change. To reduce the emission of Greenhouse gas and to obtain energy transition of sustainable range, it is necessary to integrate renewable energy in the power grid as per recent studies. Though the renewable energy sector kept its phenomenal growth in the current scenario and the prediction of its supply to fulfill two-thirds of global energy demand in 2050, there are challenges in power generation, transmission, and distribution where the economic feasibility plays a role. Modern technology, such as the Internet of Things (IoT), plays an important role in overcoming these problems and optimizing renewable energy supplies. Understanding the use of IoT technology fosters trust in this sector to give a better solution for renewable energy management such as generation, transmission, and distribution, as well as effective energy sharing to the grid. This chapter discusses IoT technologies and their integration in the renewable energy sector to increase their efficiency. Furthermore, information transmission and 30storage for data analytics to provide optimum energy supply, and issues in IoT implementation with solutions to security and privacy maintenance are highlighted.