It is globally recognized that energy drives the world's economies. However, nations must make the transition to energy sources that are secure, reliable, carbon neutral, and do not perturb the climate to ensure global economic and social growth and well-being. Renewable energies, as well as being the most abundant forms of energy, address all these issues. However, there are glaring problems with renewable energy: intermittency and variability. Renewable energy is not reliable in terms of being available on demand. To rectify this problem, reliable energy storage solutions must be found to address intermittency concerns and to ease the integration of renewable energy into existing power grids. This symposium will present attendees with the state-of-the-art in large-scale energy storage. All of the viable technology options will be considered as well as European and U.S. perspectives on current and future energy storage and grid integration issues. The session also features a discussion of the world's largest water-pumped energy storage and grid integration project. This case study will present innovative steps that will make it possible for Ireland to exploit its natural wind resources and become an important element in European energy security. The symposium will add to the global debate regarding the future of renewable energy and its potential to replace fossil fuels.