What are the relative costs? It depends very much on the weather, but in Denmark the cost can vary from around 1DKK/kWh (€0.14) to 5kr/kWh (€0.67), or a few ho

What are the relative costs? It depends very much on the weather, but in Denmark the cost can vary from around 1DKK/kWh (€0.14) to 5kr/kWh (€0.67), or a few hours a year even more. Recent and future prices are shown here: https://andelenergi.dk/kundeservice/aftaler-og-priser/timepris/ https://andelenergi.dk/kundeservice/aftaler-og-priser/timepr... I don't know of any studies done here, but anecdotally I do know people who have the app version of that webpage and will schedule their laundry/dishwasher accordingly. (And of course EV owners will configure their car to charge at the cheapest period.) Personally, the saving isn't worth thinking about for me. I run the dishwasher overnight anyway and sometimes the washing machine, but that's to avoid the noise during the evening rather than any economic or environmental reason.