Abstract: Operational planning of energy storage systems using batteries, e.g., Lithium-Ion batteries, is disclosed. A method of operating at least one server node includes: obtaining one or more load profiles associated with one or more interfacing modes of a battery energy storage system with an electrical utility distribution system, and predicting one or more degradations of the battery energy storage system, the one or more degradations being associated with operating the battery energy storage system in the one or more interfacing modes, the one or more degradations being predicted using an aging model of batteries of the battery energy storage system, the aging model being based on the one or more load profiles.