Prieto González, LisardoFensel, AnnaGómez Berbís, Juan MiguelPopa, ÁngelaAmescua Seco, Antonio de2023-07-042023-07-042021-11-03Prieto González, L.; Fensel, A.; Gómez Berbís, J.M.; Popa, A.; de Amescua Seco, A. A Survey on Energy Efficiency in Smart Homes and Smart Grids. Energies 2021, 14, 7273. https://doi.org/10.3390/en142172731996-1073https://hdl.handle.net/10016/37741Empowered by the emergence of novel information and communication technologies (ICTs) such as sensors and high-performance digital communication systems, Europe has adapted its electricity distribution network into a modern infrastructure known as a smart grid (SG). The benefits of this new infrastructure include precise and real-time capacity for measuring and monitoring the different energy-relevant parameters on the various points of the grid and for the remote operation and optimization of distribution. Furthermore, a new user profile is derived from this novel infrastructure, known as a prosumer (a user that can produce and consume energy to/from the grid), who can benefit from the features derived from applying advanced analytics and semantic technologies in the rich amount of big data generated by the different subsystems. However, this novel, highly interconnected infrastructure also presents some significant drawbacks, like those related to information security (IS). We provide a systematic literature survey of the ICT-empowered environments that comprise SGs and homes, and the application of modern artificial intelligence (AI) related technologies with sensor fusion systems and actuators, ensuring energy efficiency in such systems. Furthermore, we outline the current challenges and outlook for this field. These address new developments on microgrids, and data-driven energy efficiency that leads to better knowledge representation and decision-making for smart homes and SGseng© 2021 by the authorsAtribución 3.0 Españaenergy efficiencysmart homesemantic technologyknowledge graphssecurityfrauddetectionencryptionsmart gridcommunicationmicrogridresearch articleInformáticahttps://doi.org/10.3390/en14217273open access12116Energies14AR/0000028571