Sitting at traffic lights about a mile from a cold start. About 10c . Climate control off . Engine off in EV mode . 4 bars on the hv battery. When I switched on Climate control - set to 19c- the ICE engine immediately started. So heat is going to cost you in fuel consumption . At least until the engine has warmed up and has it to spare. .
I tried it twice, same result. And a third time just a few seconds later (its a new toy!) This time the engine did not start.
Did it reach some kind of threshold. Was it now satisfied the engine was warm enough after 1 mile to provide heat without the engine running. Or was it that HV battery now had enough charge to run the climate control without engine charging assistance?
