For me having PV panels means I don't have to use the eco wash programmes, as electricity consumption is not a worry. (Water is, however, but these days, machines use considerably less water than the old kind.
I was doing a normal, non-eco, wash at 60° the other day and, by mistake, switched the dishwasher on simultaneously. I checked the.monitor and both machines together were using about 2000 kW, and we were producing over 3000 kW so still feeding 1000 kW into the grid.
I would never open the dishwasher while it's drying as the droplets then dry on the things in there particularly plastic and cutlery, and leave marks. The higher temperature in the enclosed space makes the water evaporate quicker, leaving less marks.