Terms beginning with M referencing EN 61851
Standard or regulation
EN 61851
EN 61851 is the UK-relevant BS EN IEC standard series for conductive EV charging systems, covering EVSE requirements, charging modes, control functions and safety principles for AC and DC charging. In UK terminology it is often referenced through BS EN IEC adoption and manufacturer compliance declarations.
M
Megawatt Charging System (MCS)
Megawatt Charging System (MCS) is a high-power DC charging system developed for heavy-duty electric vehicles, particularly electric trucks and other applications that need very large amounts of energy transferred during short charging stops. It uses a dedicated high-current connector and is being standardised internationally, including within the IEC 61851 series.
Mode 1 Charging
Mode 1 charging is basic AC charging from a standard socket without dedicated EV charging control or protection built into the supply equipment. It is normally assessed alongside charging mode, AC/DC architecture, power rating, connector type and how the charger shares or delivers power.
Mode 2 Charging
Mode 2 charging uses a cable with an in-cable control and protection device between a socket outlet and the EV. It is normally assessed alongside charging mode, AC/DC architecture, power rating, connector type and how the charger shares or delivers power.
Mode 3 Charging
Mode 3 charging uses dedicated AC EV supply equipment with control signalling between the charger and the vehicle. It is normally assessed alongside charging mode, AC/DC architecture, power rating, connector type and how the charger shares or delivers power.
Mode 4 Charging
Mode 4 charging uses off-board DC charging equipment to supply DC power directly to the vehicle battery. It is normally assessed alongside charging mode, AC/DC architecture, power rating, connector type and how the charger shares or delivers power.