In conjunction with IEEE VIS 2023, Melbourne, Australia. The energy sector is witnessing significant technological progress, primarily driven by the growth of renewable energy, distributed energy resources, and smart grid technologies. This rapid evolution is generating increasingly large, complex data that present substantial challenges for energy systems planning and operations. For example, previously, distribution feeders had only a handful of sensors and controllable devices; now, with these new technologies, thousands or even tens of thousands of such devices are possible. As a result, energy system models have grown exponentially in planning scenarios from just hundreds of components to millions. Moreover, the adoption of distributed solar generation and grid-aware devices such as smart thermostats and electric vehicles are expanding the breadth of stakeholders, including consumers, engineers, regulators, urban planners, and policymakers, who are trying to understand these energy systems. These new energy systems are generating vast amounts of complex data, which require visualization techniques capable of handling the sheer scale and multifaceted complexity of the information. Unfortunately, much of the visualization supporting these changes is outdated, with simple one-line diagrams and contour plots being over-extended by the data they are being applied to. More research is needed to develop new and innovative visualization methods that can handle the increasing complexity of energy systems and provide a diversity of stakeholders with the necessary insights to make informed decisions about the future of energy.</p> The EnergyVis 2023 workshop aims to bring together scientists, researchers, and practitioners from the energy and visualization domains to critically assess and discuss energy data visualization in the context of the evolving energy sector.