Do your dishwashers not have different temperature programs? Tap water is generally set at 65ºC here. My dishwasher has a 45ºC program, a 50ºC program, etc. Depending on how dirty your dishes are you can use lower-temp program to save energy. They even make dishwasher pods specifically for lower temperatures. If it always takes in hot water it would need a way to cool it down.

Except most home outlets are rated at 16 Amps so at 110V only gives you 1760W of power, whole on a 230v outlet you can get 3680W.

• Run your faucet till hot water comes out, it makes it so the pre-rinse has more ability to soften crud on the surface of the dishes.

Why would this matter? Dishwashers aren’t connected to the hot water line.