Energy Reports is an online multidisciplinary fully open access journal, covering a large spectrum of energy research, either from a technical engineering viewpoint or from a social research aspect. The journal focuses on energy systems and their implications. The journal does not cover research on topics related to nuclear energy and mining, as well as specific or individual equipment of a system (e.g. engines, heat exchangers, etc.), chemical processes, or applications that may have a greater content from other fields instead of energy (e.g. health, psychology, etc.). For more details on the scope of the journal, authors can refer to the description of the sections below. Renewable Energy This section welcomes submissions of research related to measuring, harvesting, and conversion of renewable energies. Topics of interest include but are not limited to all kinds of technology associated with solar energy, wind energy, bioenergy, marine energy (tidal, wave, and ocean), and desalination. Electric Systems, Power, and Controls This section welcomes submissions related to electric power systems, including power generation, transmission, distribution, and utilization. We are interested in manuscripts that address the development and application of technologies and control strategies for improving the performance, reliability, and sustainability of electric power systems. Topics of interest include but are not limited to power electronics, electric vehicles, electric energy storage systems, smart grids, control, automation, and demand-side management. Energy Systems and Efficiency This section welcomes submissions that focus on systems designed to produce, convert, store, and supply useful forms of energy to meet the demand of different end users efficiently. Topics of interest include wasted/low-grade heat, thermal energy generation and use, cooling systems not associated to vapor compression refrigeration cycle, energy supply and distribution in buildings, analysis of energy-water nexus, systems energy and exergy analysis, systems maintenance and safety, and hydropower. Building's Energy and HVAC Systems This section welcomes submissions of research related to reporting novel theoretical studies, experiments, on-site measurements, numerical simulations and optimization of systems, and the equipment of building envelopes, HVAC systems, and renewable energy systems integrated with building components and construction elements. Building's energy includes thermal, visual, acoustic comfort, indoor air quality, and all technologies of the building shell (both opaque and transparent envelopes) and, energy systems, for both new constructions and retrofit of existing buildings. Energy Conversion and Storage Technologies This section welcomes submissions of research related to the development and optimization of technologies that convert and store energy for various applications, such as building, transportation, industry, and grid applications. Topics of interest include but are not limited to energy generation and conversion technologies, battery technologies, fuel cells, thermal energy storage, and renewable energy integration. Environment, Energy Economics and Policies This section welcomes submissions of research that support the advancement of the sustainable energy development along one or more sustainability dimensions - environmental, economic, and social. Topics of interest include methods for comparison and measurement of sustainability, and energy policies and measures that enable low carbon development on a global scale, along with green economy and better governance. Other featured topics include intersectoral such as energy-water, and water-food-energy, and integrated assessment models, macroeconomic analyses, trends and projections, plus energy markets, investment and finance drivers, and financial and regulatory mechanisms. Hydrocarbon Mitigation Technologies This section welcomes submissions of research that support the mitigation of environmental problems associated with hydrocarbon technology that are not associated with renewable energy. Topics of interest include but are not limited to carbon capture and storage, geothermal energy, hydrogen production, delivery, and infrastructure, along with clean fuels, and hydrocarbon processes optimization. Another key topic is the environmental and societal safety issues that need to be addressed in the extraction, transformation, and use of hydrocarbons.