Battery Terminology Glossary

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EMS (Energy Management System)

Higher-level control system that manages when and how the ESS charges/discharges according to grid signals,...

Energy Arbitrage

Charging when electricity is cheap and discharging when prices are high. 

Energy Capacity (MWh, kWh)

Total amount of energy the system can store and deliver, e.g., a 100 MWh BESS. 

Equivalent Full Cycles (EFC)

Partial cycles normalized to full cycles; two 50% DoD cycles = 1 EFC. 

ESS (Energy Storage System)

General term for any system that stores energy (electrical, thermal, mechanical, chemical) and releases it...