Of course I am activating the onboard charger when I plug in. But why should the onboard charger require cooling if it has not been used? Seems terribly wasteful to me. It's been consuming about 1/2 kwh per cycle. Are you saying that the charger is on the same coolant circuit as other electronics that got hot from driving 10 miles, so it gets cooled along with them?When you plug in, you are activating the Bolt EV's 240 V onboard charger, which requires cooling.