I have for many years thought that sawing power (electricity) is a good thing. I try to shut down things to save power and money. Today I went a step further. I did put a timer on my water heater. It now only runs on power for two hours per 24 hours.
And do it have an impact on showering and getting hot water? No. I run it between 2-4 in the morning and today I took a shower at 1300. And the water was as hot as ever.