The reason is described here
The profit for one kWh exported to the grid may be only 1/4 or 1/5 of the electricity pricing in energy consumption, or even less.
IAMMETER has always sought a solution to help customers utilize solar excess output more efficiently.
EV charger is one of the best actuators in this solution because the charging power can be controlled nearly linearly. Based on the reading of the meter on the grid side, you can get the solar excess output, then you can control the charging power , as nearly to the solar excess power as possible.