This can be done by using a smart AC charger. In europe (At least) the company Easee makes AC chargeres that are WiFi / 4G enabled. In Sweden (And Norway) you

This can be done by using a smart AC charger. In europe (At least) the company Easee makes AC chargeres that are WiFi / 4G enabled. In Sweden (And Norway) you can connect them to a service like Tibber, which allows you to automatically enable/disable charging with the electricity price, assuming you have a spot price electricity contract. https://tibber.com/en/product/easee https://tibber.com/en/product/easee Easee chargers also have a pretty bitching API, so you can also make your own automations using e.g. home assistant or what have you.