"Smitty Two" wrote in message
news

I don't think it'll save you a plug nickel. The amount of heat lost
during those 10 hours is exactly the amount of heat that has to be put
back in. It doesn't matter one whit whether it's done all at once in the
morning, or incrementally throughout the night.

There is one caveat. If your water heater is so poorly insulated or so
unfavorably situated that the water temp inside returns to supply
ambient before those ten hours elapse, then you'll save. Since you're
obviously energy conscious, that caveat likely doesn't apply.

What about me?
My WH is on for one hour daily (manually, when I get up in the AM). I take
my shower and wash dishes, then shut it off . There's still enough residual
hot water during the day for hand washing, etc. My clothes washer is only
used with cold water.