If you don’t want the full chat, here it is: overnight. Specifically, between 10 PM and 7 AM.
That’s when electricity is cheapest on most time-of-use tariffs (like Economy 7 or Economy 10). You know, the ones where your smart meter grumbles at you during the day.
But wait—are you on a standard tariff? Then it doesn’t matter. The price is flat. So, you can run it at 3 PM on a Tuesday and it costs the same as 3 AM on a Sunday. Annoying, isn’t it?
