OPD (One Pedal Driving)

[barry7153]

I use OPD as standard unless I am only going a short distance. Does anyone know how many miles are recovered using this mode?

 

[webhiker]

233 miles


Okay, I'm kidding.
The answer is, it depends.
The way you use it (the gas pedal), how often and for how long.
Some may even argue that it may not save much range, but is a tool for a more comfortable ride. Your mileage may vary (pun intended)

 

[Kithmo]

OPD is a convenience feature rather than an economy thing.
I would think it actually may use more energy when stood than other modes, especially if on an incline.

 

[DixieTGS]

OPD is a convenience feature rather than an economy thing.
I would think it actually may use more energy when stood than other modes, especially if on an incline.

Agree. Sometimes the power meter shows significant power use when stationary especially if on an incline - I suspect that is a bug in many cases.

Using auto hold should reduce the extra power use to very little, and once on and stationary, using the handbrake should reduce it to 0 if the wait may be long. I believe the power meter value always drops to 0 in this case.

 

[Bam Bam]

Agree. Sometimes the power meter shows significant power use when stationary especially if on an incline - I suspect that is a bug in many cases.

Using auto hold should reduce the extra power use to very little, and once on and stationary, using the handbrake should reduce it to 0 if the wait may be long. I believe the power meter value always drops to 0 in this case.

Autohold will reduce power usage to zero. It is essentially the handbrake but with a 'quick release' by remaining in gear.

The car will hold itself on the motor but I've noticed that using up to 20% of motor power, which would add up to a huge amount over time.

Autohold is a massive energy saver for an EV since it doesn't have idling power available like an ICE car does (it is also really convenient!)

 

[Bam Bam]

I use OPD as standard unless I am only going a short distance. Does anyone know how many miles are recovered using this mode.

It will indeed depend.

Are you comparing to no regen at all or to the next level down?

If you are on the highway going a steady speed the whole time it won't gain you anything really.

If you are in traffic, then regen gains you a significant amount. Some people have shared their stats but I can't remember off the top of my head.

I once drove down from the hills to the valley and had unbelievable efficiency ratings for a little while!

 

[DixieTGS]

Autohold will reduce power usage to zero. It is essentially the handbrake but with a 'quick release' by remaining in gear.

I had read the autohold and parking brake both use the pads just like the foot pedal, but the parking brake winds a motor to clamp the discs (so a worm drive or similar) which doesn't require power once on, but autohold uses the same mechanism as the power assisted brakes and so requires a bit of power to maintain the force until released.

That info would have come from a website and not the manual so I'm not sure how trustworthy it is .

 

[Bam Bam]

I had read the autohold and parking brake both use the pads just like the foot pedal, but the parking brake winds a motor to clamp the discs (so a worm drive or similar) which doesn't require power once on, but autohold uses the same mechanism as the power assisted brakes and so requires a bit of power to maintain the force until released.

Ahh right, possibly.

I'm just going by the fact that the power percentage on the dash drops to zero when on autohold.

That no doubt is just reporting the main motor, so any power required to engage brakes won't be accounted for.

That said, I would expect that the power required to push a brake pad must be minuscule compared to the power required to hold a 1.6 tonne car in place against rolling down a hill.

 

[decrep]

I'm under the impression, that after coming to a stop with OPD the parking brake is applied, not held on the motor. I'll check next time I stop on a slope.

 

[decrep]

I use OPD as standard unless I am only going a short distance. Does anyone know how many miles are recovered using this mode?

The simple answer to that is "no".

The longer answer is, "insufficient data"

The ratio of distance under power to distance under braking has a huge influence.
Stop start driving over short distances will give the best distance recovered for distance traveled. long distances at steady speed, will give you hardly any distance recovered.

Also "distance" is probably the wrong unit, as that will also vary with driving. "Energy" is more appropriate, because that is what is recovered, and you can work out distance from your distance/kWh

[ Edit moderator: "Power" → "Energy" ]

 

[DixieTGS]

I'm under the impression, that after coming to a stop with OPD the parking brake is applied, not held on the motor. I'll check next time I stop on a slope.

On the flat I believe autohold kicks in as you stop if it is turned on in the menus, and you don't hear the little motor whir to apply the parking brake. I've no idea what happens if auto hold is disabled, or any difference with up / down hill operation. Adding to the regen with the foot brake when stopping may also change the behaviour.

You can also tell which brake is applied by looking at the dashboard.

On a hill it could get confusing to work out what's what because there is also hill hold control (HHC), which has a lot in common with auto hold but is not the same thing. I hope you've got some quiet roads to experiment on as it may take a while to sort out.

 

[siteguru]

Ahh right, possibly.

I'm just going by the fact that the power percentage on the dash drops to zero when on autohold.

That no doubt is just reporting the main motor, so any power required to engage brakes won't be accounted for.

That said, I would expect that the power required to push a brake pad must be minuscule compared to the power required to hold a 1.6 tonne car in place against rolling down a hill.

The actuator for the brakes will be on the 12V system not the main battery anyway, so the amount of power will be - as you said - miniscule.

 

[NLMGSAN]

Did any of you experience that with low charge levels (<10%) OPD was disabled?