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Smart charging is a form of electric vehicle charging in which the time and rate at which an EV's battery pack is charged can be controlled in a more "intelligent" way than the simple use of a manual on/off switch.
Typically smart charging is used to reduce the peak loads on the electricity distribution grid supplying the power needed to charge an electric vehicle.
The United Kingdom Government has mandated that:
"All government funded home chargepoints for electric vehicles must use innovative ‘smart’ technology from July 2019. This means chargepoints must be able to be remotely accessed, and capable of receiving, interpreting and reacting to a signal. Smart charging can also reduce high peaks of electricity demands, minimising the cost of electric vehicles to the electricity system – and keeping costs down for consumers by encouraging off-peak charging."