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EV charging glossary

Industry jargon

Battery Energy Storage System

Also called: BESS, battery storage system A Battery Energy Storage System, or BESS, stores electrical energy in batteries so it can be used later. A complete BESS normally includes battery packs along with power conversion, control, protection and thermal-management equipment. At an EV charging site, a BESS can reduce grid import during peak charging demand, store on-site generation or shift energy use between time periods. The value depends on the site's electrical limits, tariff structure and operating pattern. A BESS is a separate asset from the EV batteries themselves, although both can take part in site energy management.

Related terms

Peak shaving

Load balancing

DER
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