I have a partially electric car, a 2016 Toyota RAV4 hybrid. I have noted there are two ways I can hold the car on a hill at standstill. I can either press the brake pedal (after releasing it, there's an automatic hill hold that will hold it for a few seconds), or alternatively I can press the accelerator slightly.
I however have worried about the potential implications of holding the car on a hill by the accelerator for extended periods of time. I know that the electric motors are providing the same torque they would be producing by driving the hill up, and thus the current through the windings shouldn't be too high. However, even given that, the electric motors are at standstill, so if their cooling happens by air circulation, they won't be cooled.
So, is it harmful to hold an electric car on a hill by pressing the accelerator slightly? Are there any electric motor cooling issues?