IEC 61851 is an international standard for electric vehicle conductive charging systems, parts of which are currently still under development^{(written 2017)}. IEC 61851 is one of the International Electrotechnical Commission's group of standards for electric road vehicles and electric industrial trucks and is the responsibility of IEC Technical Committee 69 (TC69).

IEC 61851 consists of the following parts, detailed in separate IEC 61851 standard documents:

IEC 61851-1 defines four modes of charging: