"A review of flywheel energy storage systems: state of the art and opportunities" comprehensively examines flywheel energy storage systems (FESS), detailing their components (flywheel rotors, bearings, converters, and auxiliary systems), materials (composite and steel), and applications (utility, renewable energy integration, transportation, and defense). Taurus, is using FESS in residential renewable energy generation, focusing on the system's advantages (sustainability, longevity, performance in extreme environments, rapid charge/discharge) and challenges (cost, self-discharge limitations). Both sources highlight the potential of FESS, particularly in niche applications and hybrid systems, but acknowledge the technology's current limitations compared to lithium-ion batteries. The paper offers a deeper technical analysis, while the YouTube video provides a more accessible overview of a specific company's approach and market positioning. Both sources suggest that FESS may play a significant role in future energy storage solutions, particularly in conjunction with other technologies.