In the pursuit of sustainable development, the integration of renewable energy technologies in building designs has become a key strategy for reducing energy consumption and environmental impact. This chapter explores the integration of sustainable power generation technologies in energy-efficient buildings, focusing on enhancing energy efficiency through advanced electrical systems and renewable energy sourcesRenewable energy sources. It delves into the role of smart grids, energy management systemsEnergy management systems, and dynamic pricing models in optimizing energy consumption, supported by predictive algorithmsPredictive algorithms and real-time monitoring. The chapter also examines the integration of renewable energy sourcesRenewable energy sources, such as solar photovoltaicsPhotovoltaic (PV) systems (PV), wind turbinesWind turbines, and geothermal heat pumpsGeothermal heat pumps , highlighting their contribution to energy independence and grid reliability. Building-integrated photovoltaicsPhotovoltaic (PV) systems (BIPV) and microgridsMicrogrids are emphasized for their ability to provide on-site power generation and contribute to the resilience and sustainability of urban infrastructure. Additionally, the chapter discusses innovative applications like solar-powered smart windows, thin-film solar cells, and photovoltaicPhotovoltaic (PV) systems thermal collectors (PV/T), showcasing their potential to revolutionize energy efficiency in modern buildings. By combining technological advancements with sustainable architectural practices, this chapter outlines a path toward reducing energy consumption, lowering operational costs, and mitigating environmental impacts in the built environment.