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All industries › Glossary › Battery energy storage system

Glossary

Battery energy storage system

Also: BESS, battery storage, standalone storage

A grid-connected battery site: containers of lithium-ion cells, inverters and a substation, built in months on a few acres.

A utility-scale battery site is rows of containerized battery modules on concrete pads, with inverters, transformers and a substation. It charges from the grid and discharges when power is worth more. Standalone storage has its own queue position; a battery paired with a solar farm usually shares the solar farm's.

Battery sites are smaller and faster to build than solar farms (a few acres to a dozen per hundred megawatts, and months rather than a year), with more concrete, electrical and fire protection work per acre. Groundtrace tracks standalone battery sites as their own industry.

Related terms

MW and MWhA plant's power (megawatts) and a battery's stored energy (megawatt-hours); a solar farm's size in AC and DC differs.Interconnection queueThe grid operator's list of power projects asking to connect to the grid, usually the first public trace of a solar, wind or storage site.Trade subcontractorA company hired by the builder for one scope of work: clearing, grading, piling, electrical, survey, fencing and the like.
Every term Utility solar projects Data center projects

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