What is a BESS? The basics of battery storage

What is BESS?

A Battery Energy Storage System (BESS) is a system that stores electrical energy in batteries for later use. These systems play an increasingly important role in the energy transition, as they make it possible to store surplus energy and use it when demand is at its highest.

BESS systems come in many sizes — from small units for individual buildings to large container-based installations for industrial use and grid connection. Globe Energy delivers systems from 50 kW to several GW.

How does it work?

A BESS consists of battery cells (typically lithium iron phosphate/LFP), a battery inverter, a battery management system (BMS), and an energy management system (EMS). The BMS monitors the cells' temperature, voltage, and current to ensure safe and efficient operation.

The system charges when electricity prices are low or when solar panels produce surplus energy, and delivers energy back when prices are high or consumption is at its peak.

Benefits of BESS

Key benefits include reduced electricity costs through peak shaving, increased utilization of renewable energy, backup power during outages, and the ability to participate in frequency regulation markets. For industrial companies, a BESS can also reduce power peaks and thereby significantly lower grid tariffs.