You can run the dishwasher and washing machine at cheap times, is the first thing that comes to mind. Ditto the heated airerQuestion about them ,
If your the average 2 adult , few kids and your heating is on all the time in winter because someone is in etc etc how is a smart meter going to save you money ? dont you pay extra for the service so in the long run your not saving ?
FIL just had one and they are retired and always someone in .