A typical BESS includes battery cells or modules, battery racks, a battery management system, a power conversion system, an energy management system, thermal management, fire protection, switchgear, monitoring software, and safety protection devices. These components work together to store, convert, control, and safely deliver energy.

A Battery Management System, or BMS, monitors and protects the battery. It tracks voltage, current, temperature, state of charge, state of health, and cell balance. The BMS helps prevent overcharging, over-discharging, overheating, and unsafe operating conditions.

A Power Conversion System, or PCS, is a bidirectional inverter used in a BESS. It converts DC power from the batteries into AC power for the facility or grid, and converts AC power back into DC power when charging the batteries. The PCS is essential for safe and efficient energy conversion.

An Energy Management System, or EMS, controls when the BESS charges and discharges. It can optimize energy use based on electricity prices, demand peaks, solar production, backup needs, grid signals, and operating rules. The EMS is the control layer that helps the BESS deliver economic and operational value.

Liquid cooling uses a circulating coolant to manage battery temperature more evenly and efficiently than basic air cooling. It can improve temperature consistency, support high-density designs, reduce thermal stress, and help maintain battery performance and lifespan in demanding commercial and industrial applications.