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EV charging glossary

Industry jargon

Bidirectional charging

Bidirectional charging allows electrical energy to flow both into an EV battery and back out through compatible charging equipment. The exported energy can be used by a home, building, local load or electricity network depending on the system design. ISO 15118-20 defines communication messages and sequences for bidirectional power transfer. The vehicle, EVSE, electrical installation and grid connection must all support the intended use case. Bidirectional capability at the charger does not automatically permit export to the public network. Grid-connection requirements, including G99 and G100 where applicable in Great Britain, still need to be satisfied.

Related terms

Vehicle-to-grid

Vehicle-to-home

ISO 15118
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