Advanced and hybrid energy storage technologies offer a revolutionary way to address the problems with contemporary energy applications. The new phase of the energy transition is unfolding in three waves, each. The AES Lawai Solar Project in Kauai, Hawaii has a 100 megawatt-hour battery energy storage system paired with a solar photovoltaic system. Sometimes two is better than one. Flexible, scalable, and effective energy storage is provided via thermal-electric systems, battery-supercapacitor hybrids, and high-performance supercapacitors.