
Energy storage devices (ESDs) have become an essential component in renewable energy systems for higher reliability, given the fluctuating nature of renewable energy sources such as solar, wind, and biomass. Thus, various types of ESDs have been invented over the past years, and rechargeable batteries play an increasingly vital role in storing energy in response to the fluctuating nature of the renewable sources and increasing demand for reliable renewable energy sources. ESD options for longer-term and infrequent utilization can be listed primarily as below