I was going to start a new thread but I see that others are already discussing this issue.
My experience is that, for the first few months, I would only hear the noise of the fans/pump while charging the car, after charging the car for a while, or after driving and using regenerative braking -- at least in warm weather. In other words, I would only hear it running when it was needed. On days when the car had not been used or charged recently, the car would remain silent when I powered it up.
After a couple of months however, it started to run all the time. No matter how cool the ambient temperature, no matter how long since it had been last charged or driven (even after a day or two), as soon as I power up the car, the noise of the cooling fan/pumps can be heard. It runs constantly now. Not only is it sad (I miss my silent car), I don't like the notion of expending energy to keep that pump running all the time.
Can someone confirm for me that the car can indeed be silent as I remember? In other words, you power it up and so long as you haven't been charging/driving recently (say, overnight) and the ambient temperature is cool, you don't hear anything? Of course the climate control system should be off too. (I ask because mine's been making noise like this since like July and I'm starting to doubt my memory.)
And if the answers come back yes, it can/was/is silent, how many never get silence now? Who else starts up their car and *always* hears the same sound you hear when you plug-in for charging -- the apparent sound of the cooling fans/pumps for the invertor (and motor?)?