How many amps drawn when stopped with light foot on brake?

[hdrygas]

I will check tomorrow but with my foot lightly on the break and stereo on, air on 2-3. I am learning to not press the break hard right now so I will have to check but by memory alone it may be 1-2 higher. I will check tomorrow.

[hobbit]

You're testing with the *AC* on ?! You realize that's a whole
'nother kilowatt of draw directly from the HV battery, right?
There's where your 5 amps are coming from.
.
Try it with everything else turned off and letting the creep force
try to work against the set parking brake so you sit still.
.
_H*

[ScottY]

ok... i went out and confirm it again. The reading is with everything off, current draw 1.x amps. When I allow the car to creep, it's 1.x amp more. Total of 2-3 amps.

[GreenJuice]

I'm resurrecting this 2 year old thread to give some additional readings from my ScanGauge II BTA Xgauge in various situations when stopped, and to ask a question of the many gurus who've previously contributed to this thread!

My additional observations (A/C, lights, interior fan all off):
If I hold the car stationary in D with a light foot on the brake so that the yellow arrow from the battery on the MFD is still on, it reads around 2 - 3 amps.
A firm pressure on the brake, drops its down to around 1.5 amps, as the yellow arrow clears. This reading stays the same regardless of whether I am in D, N or P.
Lift off the brake in D and the reading rises to 2 -3 amps, as the car creeps forward.
Lift off the brake in P or N and the reading falls to around 0.9 - 1.1 amp range.
I guess this last figure represents a background or baseline energy use.
The application of the brake itself appears to consume energy, putting up the current draw.

My question:
Does this imply that there might be something (perhaps minimal) to be gained by selecting P and taking my foot of all pedals, if I think I might get held up at a long set of lights?

[ken1784]

Originally Posted by GreenJuice

My question:
Does this imply that there might be something (perhaps minimal) to be gained by selecting P and taking my foot of all pedals, if I think I might get held up at a long set of lights?

I also think it is minimal, 0.5 amps between brake-on and off.

However, following is a ceremony among Japanese hypermilers going to red lights.

1. shift to N below 7mph, no more regen expected and no electric consumption of simulating creeping at lower speed by light braking
2. apply parking brake when stopped, then release foot brake to save 0.5 amps
3. shift to D and release parking brake when to start

Ken@Japan

[David Beale]

With foot hard on brake you are adding the brake lights to the load and intermittently, the brake booster pump as well as making the braking system "think". As these run off the 12V system you may not see an immediate change, as the charger may take some time to compensate. Note that while the brake lights don't draw very much at all, they will trip the charger, and it's not very efficient, thus you can see the difference.