The Nissan Leaf employs an advanced telematics system called "Carwings" which originally was only available in Japan.[83][84] The system sends and receives data via a built-in GPRS radio similar to the connectivity of mobile phones. Carwings is connected any time the car is in range of a cell tower and it makes possible several user functionalities, such as position and possible range on a map and which charging stations are available within range. The system also tracks and compiles statistics about distance traveled and energy consumption and produces daily, monthly and annual reports of these and several other operational parameters. All information is available in the Leaf's digital screens.[83][85] Users' mobile phones can be used to turn on the air-conditioner and heater, and reset charging functions even when the vehicle is powered down. This remote functionality can be used to pre-heat or pre-cool the car prior to use while it is still charging so that less energy from the battery is used for climate control. An on-board remote-controlled timer can also be pre-programmed to recharge batteries at a set time such as during off-peak rates.[86] The Leaf's SL trim has a small solar panel at the rear of the roof/spoiler that can trickle charge the auxiliary battery.
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