State of Health (SOH) refers to the overall condition or health status of a battery or energy storage system. It indicates the degree of degradation or wear that the battery has experienced over time and usage. SOH provides valuable information about the battery's remaining useful life and its ability to deliver its rated capacity. Factors affecting SOH include the number of charge-discharge cycles, operating conditions, temperature, and usage patterns. Monitoring SOH is essential for assessing battery performance, predicting maintenance needs, and optimizing battery usage to ensure reliability and longevity.