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EV charging glossary

Battery

Battery capacity

EV battery capacity is the amount of electrical energy a battery can store, usually stated in kilowatt-hours. Capacity is an energy quantity, so it should not be expressed in kilowatts, which measure power. Manufacturers may publish gross capacity and usable capacity. Gross capacity describes the total designed energy content, while usable capacity is the portion the vehicle allows the driver to access within the battery-management limits. A larger capacity can support more driving range, but range also depends on vehicle efficiency, speed, temperature and auxiliary loads.

Related terms

kWh

State of charge

State of health
Browse the full glossary Interactive periodic table

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