There are apps that track the prices and can automatically "trigger" charging when it's cheaper. Found these examples by quickly googling: https://www.trueene

There are apps that track the prices and can automatically "trigger" charging when it's cheaper. Found these examples by quickly googling: https://www.trueenergy.io/app/ https://www.trueenergy.io/app/ https://play.google.com/store/apps/details?id=com.sense.androidclient https://play.google.com/store/apps/details?id=com.sense.andr... https://play.google.com/store/apps/details?id=com.tibber.android https://play.google.com/store/apps/details?id=com.tibber.and... EDIT: to answer the question: yes, these apps use something called "Nord Pool" which publishes hourly electricity prices (in Swedish): https://elavtal24.com/blogg/tibber-greenely/ https://elavtal24.com/blogg/tibber-greenely/