Porsche Invents Perpetual Motion!

[beez]

The following Porsche article is interesting in that it says regen is stronger in Sport and Sport+ modes. This would explain the report on this forum by someone getting better range in Sport mode for a specific drive. I experimented and it is more aggressive.

https://ask.porsche.com/gb/en-GB/recuperation-and-drive-modes-macan-electric/

Humorously, they also say “Tip: Check your state of charge (SoC) on your next downhill drive - thanks to efficient recuperation, you may arrive in the valley with more energy than you used for the uphill drive.” If that were true, which is not possible, you could drive up and down that magic hill forever and never have to charge your car

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[craz8]

Infinite Energy - I'll take 2!

Tuned for dynamic performance with more direct response behaviour. Recuperation is stronger in these modes,

Does this mean that Normal mode does NOT regen at 240kw, and only Sport/Sport+ get the full energy, or, is this simply saying the brake pedal is more responsive in the Sport and Sport+ mode? I think it's the latter, in the same way the accelerator is more responsive too.

What I don't think it means is that the Overrun Recuperation changes performance, since that is set to only 0.6 m/s² and no Sport/Sport+ modification is noted in that section.

Fun Fact: I found out recently that the new, expensive, Lucid Gravity does NOT do blended braking - regen is only on the accelerator pedal!

 

[Awaz]

“Tip: Check your state of charge (SoC) on your next downhill drive - thanks to efficient recuperation, you may arrive in the valley with more energy than you used for the uphill drive.”

Yes, I did experience this when I took a trip to the Furka Pass in the Swiss Alps last summer. On my return, which was a downhill drive, it happened.
I don’t remember the exact numbers. But what I do remember is that I was very surprised that there was more energy than I used for the uphill drive.

 

[Fly4ever]

Is there also a visual difference in the main screen with the green arc goes even further counterclockwise when in sport/sport+ mode indicating more energy is gained?This is something I'll definitely try out during my next downhill ride!

 

[ColdCase]

You do know that more electrons are used driving up hill to create the potential energy (height) than are saved on the downhill.

Driving the 500 miles down to my parents house is always more fuel efficient than the way back, gas or electrons.

Everything is relative

 

[sor]

The only way I can make that “tip” make sense is if they aren’t talking about a round trip. For example, I’m on the highway headed from city A to city B. There is a hill in between the cities. City B is at a lower elevation. Therefore I can arrive in the valley on the city B side with higher SoC than I had when starting the uphill drive on the city A side.

 

[CHP]

Tip: Check your state of charge (SoC) on your next downhill drive - thanks to efficient recuperation, you may arrive in the valley with more energy than you used for the uphill drive.

Electric cars are considerably more efficient than ICE in mountains due to recuperation. This article however is misleading. Energy recovered from B downhill to A will be less than energy used going from A uphill to B. Simple thermodynamics and conservation of energy. Starting at A going uphill to B and then downhill to C however may give you this impression (experienced this in the Lake District myself).

Regen changes with drive modes, in sport/sport+ once lifting off the accelerator, regen will kick in harder to mimic ICE vs. coasting in other modes. Coasting downhill may work on a highway but certainly not on a mountain pass. Regen will come from braking (limited to 240 kW in Macan). That being said, Cayenne Turbo (600 kW) has highest regen so may have advantage in very fast mountain pass downhill runs.

Don't think Porsche engineers will appreciate this article. Thats why we always nanny journalists in my profession.

 

[daveo4EV]

The following Porsche article is interesting in that it says regen is stronger in Sport and Sport+ modes. This would explain the report on this forum by someone getting better range in Sport mode for a specific drive. I experimented and it is more aggressive.

https://ask.porsche.com/gb/en-GB/recuperation-and-drive-modes-macan-electric/

Humorously, they also say “Tip: Check your state of charge (SoC) on your next downhill drive - thanks to efficient recuperation, you may arrive in the valley with more energy than you used for the uphill drive.” If that were true, which is not possible, you could drive up and down that magic hill forever and never have to charge your car

Coasting is more efficient than regen - regen is only a win if you're actually going to stop the car or intended to decelerate the vehicle…

regen is no more than 55-65% efficient - i.e. you put 100 units of energy into the vehicle to get it up to speed - you may recover 60 of those units back the battery while bringing the car to a stop…

"more powerful" regen is simply porsche adjusting the max power regen is allowed to harvest slowing you faster - not recovering more energy - there is still only 100 units of energy in the system when you touch the brakes, but more powerful regen will harvest it's 60 units more quickly (slowing the car at a higher rate of g's)…

regen is not more efficient - it's just less wasteful than converting the kinetic energy into battery juice vs. throwing all the energy away as waste heat/thermals via the friction brakes…

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