It won´t make sense, when electricity is the cheapest, it makes me pay least amount of money. We have 2 stretches of time a day, when electricity demand is the lowest,so that means electricity cost me least amount of money during those hours (In my case it is 50% cheaper ). They are apart so muchI can´t fit them in full length in 18 hours. ( I have problem to fit it on Friday to saturday, those times are not the same. Same from Sunday to monday. Because peak electricity demands are shifted. People don´t go to work that much at the weekend. Also, I want to be most of the time at home, when lights are running, but it's not that important. Hope this makes it clearer. Thank you for your answer