The #Fingrid #Tuntihinta app has become popular in Finland. (Unfortunately only Finnish UI)

Yesterday (La=Sat) when electricity was almost free (windy!) I forgot to switch on the dishwasher in the evening and was sanctioned €0,20 for washing dishes today (Su=Sunday)

I also feel guilty for causing some peaker plant to ramp up slightly, possibly with non-renewable fuel and driving prices up for everyone else on the grid.