Dynamic capacity estimation for a typical grid-tied event programmable Li-FePO4 battery

Electro-chemical batteries suffer capacity fading over the usage lifetime. Contributing factors are operating conditions, which includes local weather, selection of safety thresholds and event management. In addition, the shelf life is also known to be dependent on the inherent deterioration of the chemical properties over time. The term `capacity fading' does not carry value without indicating a benchmark to evaluate it. In this case, the benchmark is signified by the contracting down the safe operation region over the tenure of usage, within an expected limit, beyond which the system is considered unsafe or uneconomical to operate. This assessment was important to estimate useful battery life feasible for cost recovery.