Mi sembrava strano...
I was surprised too of a gas-dishwasher!

)
Now the changed description could not make anyone mistake again...
Steve, here in Italy I mean, is not usual to accumulate hot water, as can happen often there in US or in some other countries of the Europe, to be used for anything you need, from laundry to shower.
For those who haven't electric water heater (used only where there's not a gas pubblic line, because of their high electric consumes) we have one gas-heater ("caldaia a gas") which produce hot water "instantaneally", as you switch on any hot faucet of the house.
Although that, the appliances as washers and dishwashers, are both connected only with cold water, as they have only one inlet valve; they increase temperature electrically, and this is possible thanks to the built-in heater at 2000W/16A to 240V/50Hz wiring.
SUN! This is a real energy producer, I'm thinking of putting on my house-roof a solar-board to get hot water with sun irradiation! And than accumulate it...
Now it's snowing... but spring and summer are very sunny!!!