... Turn off hot water heater until 3 hours before needed. I only need hot water in the morning so that saves lots of electricity. ...
Actually, not heating the water until you need it is probably not really saving you anything measurable at all (not 'lots'). Modern electric water heaters are well insulated, very little energy is required to
keep the water hot, compared to the amount of energy required to
get the water hot (which is the same in either case).
If you have to raise the water from say 60 F to 130 F, that is a 70 F increase. But an electric tank may only lose a few degrees overnight. And those are either made up in the morning, or in stages at night. So there is almost no difference at all.
If you want to get really technical, if the average temperature overnight is 125 F rather than being kept at 130 F, it will lose energy at a slightly lower rate (slight less T-delta), but this is minuscule.
...
2. tankless hot water heater
...
Much the same applies to a tankless.
But more importantly, it seems you both could save much more $$$. Why are you heating hot water? If it's hot, you don't need a water heater, or spend any money on energy.
OK, that probably belongs in the 'pet peeve' thread, but it is a
water heater, not a
hot water heater. You don't need to heat hot water, it is already hot.
-ERD50