Impact of cruising speed on range

[Awaz]

I find range to be more important than charging speed.

Agreed,
On long trips, need around 45 minutes break for a relaxed lunch break and coffee etc. In that time, the battery can charge up to the limit you want.
Wouldn't a real world range of around 450 be nice? Donut Lab’s “Miracle” Solid-State Battery is a start. So let's see how it pans out.

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[jwatte]

The Escalade IQ claims a 450 mile range.
There are things other than range that matter

 

[EVowner]

Macan 4S 20" Aero wheels, air suspension on non studded winter tyres.
Battery temp 24C with preheated cabin to 22C (charged right before departure).

Driven 100km on highway at 130km/h with outside temps -5C to -2,5C, dry road no headwind.

Average speed 126km/h(78mi/h) with consumption 30,7kWh/100km(2.02 mi/kWh) Battery temp when I parked was 20C.

I understand that consumption in winter will be higher, but I always thought main culprits were battery temp and heating. Like stated battery temp in this drive was close to ideal conditions for whole journey. Also car was preheated so I would expected that it would be running just heat pump which should not be consuming crazy amount of energy.

Does anybody else see such poor numbers?

 

[Degenatron]

Macan 4S 20" Aero wheels, air suspension on non studded winter tyres.
Battery temp 24C with preheated cabin to 22C (charged right before departure).

Driven 100km on highway at 130km/h with outside temps -5C to -2,5C, dry road no headwind.

Average speed 126km/h(78mi/h) with consumption 30,7kWh/100km(2.02 mi/kWh) Battery temp when I parked was 20C.

I understand that consumption in winter will be higher, but I always thought main culprits were battery temp and heating. Like stated battery temp in this drive was close to ideal conditions for whole journey. Also car was preheated so I would expected that it would be running just heat pump which should not be consuming crazy amount of energy.

Does anybody else see such poor numbers?

Looks about right, matches my experience below. Values in blue are measured, black calculated based on the range test video & porsche consumption data:

I would say my 86mph @ 5C is equivalent to your 80mph at -5C, then your 22C cabin heat took you down a notch to 2.0m/kWh!

 

[TomekGnomek]

Does anybody else see such poor numbers?

It's not poor, I would say it's standard.

I usually get way above 30kw given similar conditions (21" wheels, 140km/h in winter), never ever below 30kw unless the avg speed is significantly below 100 km/h.

What's interesting is I get very similar results in Taycan which should be more efficient at least on highway. So I guess the EV is what it is, above certain parameters the impact of speed and temp on battery drain is so big other factors became insignificant. Good thing it charges fast so after some time I stopped caring about the range just make sure there are HPC chargers on the way and let the PCM do it's job.

 

[EVowner]

It's not poor, I would say it's standard.

I usually get way above 30kw given similar conditions (21" wheels, 140km/h in winter), never ever below 30kw unless the avg speed is significantly below 100 km/h.

Really? Maybe heavy footed driving?
I have a friend with Macan Turbo on 22" rims who claims at 120km/h in 3C outside he is getting around 26.9 kWh/100km.

Last month with average speed 124km/h in 2C outside temp I was getting consumption 24.8 kWh/100km. That said I observed that my car seems to be sometimes giving these nice numbers and then randomly high ones while driving same stretches of highway. Hence me wondering what is the standard.

 

[TomekGnomek]

Last month with average speed 124km/h in 2C outside temp I was getting consumption 24.8 kWh/100km.

For me avg 123 km/h on highway means you are mostly doing 140km/h.
This was in +5C outside temp.

I very much doubt claims of anything below 30kw during longer stretches of high speed driving in winter. You can - under some circumstances - get "120km/h in 3C outside he is getting around 26.9 kWh/100km" perhaps downhill or sth

There are many factors like elevation change, road friction (some highways are smooth with more asphalt, some have more concrete), tires, tire pressure. During long stretches of highway driving all these factors combine.

How you exit a corner matters as just entering the highway alone can have impact - you can slowly drive and accelerate or you can feel the back sliding on full throttle. So driving style also comes into play.

Overall it is what it is - either you can charge fast and have fun driving or the EV is not for you

That being told I noticed some improvement in consumption after:
1) the first software update
2) doing a better job with tire alignment on wheels minimising the RFV (Road Force Variation)

 

[EVowner]

For me avg 123 km/h on highway means you are mostly doing 140km/h.
This was in +5C outside temp.

Ok I see the difference now. When I am talking about driving 130km/h it is speed set to cruise control with me resetting trip meter once I enter highway. Both mentioned drives were with mostly empty highway so there was not much of breaking/accelerating hence real average speeds being 124 and 126km/h.

When you are saying that you are getting average speed 123km/h with doing mostly 140km/h it most likely means that you do a lot of breaking and accelerating so while we get similar average speeds consumption can be quite different.

While you are right that there are many factors at play I just don't see much differences other than few C delta in outside temp in my drives. My car is also randomly losing SOC % while parked in garage, so I am wondering if maybe BMS is getting messed up calculations.

 

[TomekGnomek]

My car is also randomly losing SOC % while parked in garage, so I am wondering if maybe BMS is getting messed up calculations.

So I would check this - there is a separate thread abut this problem.
Some cars keep the SoC and some cars loose the charge up to 1% daily which is not normal.
I would try to document this and have it checked.

 

[KLMRCLL]

My car is also randomly losing SOC % while parked in garage, so I am wondering if maybe BMS is getting messed up calculations

Unplugged cars loose SoC at a certain rate if unused and unplugged after 24h or so. Look at the manual for details. Specially if the SoC is above 80%.

 

[MatC21]

This was at 0 degrees celsius and constant 150-160 kmh, sometimes 170. Plus entry/exit to autobahn on some 30kmh city parts which ruin the average. 20 inch winter tires on 4S.

 

[USMA81]

I went to AI for a bit more information on temperature effects, specifically asking about air density and rolling resistance. Air density is about 7.5% greater at 0 C (32 F) than at 20 C (68 F). Rolling resistance is 15-30% higher at 0 C. So these have significant effects on range.

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