ROUTE MONITOR - NAVIGATION

[GasStation]

The route monitor shows a battery remaining of 56% at destination but my actual battery level is 42%.

What exactly is the route monitor battery % reflecting?

Anyone with road trip experience and knowledge appreciated.

Sponsored

 

[Bennie]

I have the same problem with my car. My dealer reported it to Porsche Netherlands. A ticket has been created so that the problem is acknowledged and investigated.

The initial explanation is that the car is not interpreting the battery correctly. Therefore, the car will be picked up, charged to 100%, and then discharged in a controlled manner. This will likely be done a few times, as they have reserved just under a week to resolve the issue.
I cannot report anything more yet, as the appointment is not scheduled for another month.

 

[RunningOnSolar]

I was having a similar problem immediately after the WSJ0 update. I would arrive at destinations (supposedly) with more charge than before I left.

The problem disappeared after I charged to 100% (when I usually charge to 80%) and received a newer version of the PCM charging app with new features. I also have the most up-to-date version of the iPhone app after first deleting the app from all my devices.

You can also try the standard lock and walk. If all your keys are well separated from your car for 45 minutes or so (or kept in a Faraday box) that should cause the car to reset. Finally there is the PCM reset if other remedies don't work...

 

[PrudentOcean]

Also be aware that the range estimate for the battery SoC is based on your recent consumption, whereas the navigation system will consider whether the route to your selected destination includes elevation changes, speed changes or weather conditions that will significantly affect consumption. Consequently, the two numbers will rarely agree.

 

[Jonjh1964]

I have a similar problem route planner estimates battery a destination that’s more than the actual battery current charge. Only happens with me as user, if I log out and use guest the planner battery estimate is back to being accurate/ slightly pessimistic. If I need to charge on-route I log-in as guest and live with having to set the radio and plan on the PCM. I do have a ticket with Porsche GB looking into it.

 

[ChrisFromUK]

I had this problem too last August initially but it went away after a couple of weeks. It's reoccurred a couple of times since though.

Can't be certain but I think this can be resolved at least temporarily by running the car down to a low state of charge (ie 3% or lower), leaving it overnight, running it down to 3% or less again if the SoC has gone up and then charging to 100%, leaving it again overnight and finally topping up again to 100% if it has gone down overnight. A bit long winded but it possibly cures this and definitely fixes issues with improbably range remaining compared to SoC. For example mine was reporting 0 miles range at 10% charge a couple of months ago and this process fixed it.

As noted by another poster, logging into the car as a guest user may fix the problem too. It didn't for me though.

 

[Wivenhoe]

I had this issue. It was resolved by the dealer installing several small updates including a battery management one. The issue occurred after the major update but not immediately. Been fine ever since The BM update.

 

[mpgrant5]

I have a similar problem route planner estimates battery a destination that’s more than the actual battery current charge. Only happens with me as user, if I log out and use guest the planner battery estimate is back to being accurate/ slightly pessimistic. If I need to charge on-route I log-in as guest and live with having to set the radio and plan on the PCM. I do have a ticket with Porsche GB looking into it.

Hi yes I have the same problem with my car

 

[GasStation]

Also be aware that the range estimate for the battery SoC is based on your recent consumption, whereas the navigation system will consider whether the route to your selected destination includes elevation changes, speed changes or weather conditions that will significantly affect consumption. Consequently, the two numbers will rarely agree.

...speed changes, for sure. However, elevation changes and weather conditions - I doubt it very much. We're in the realm of ABRP here and I doubt they sold any data to Porsche.

The problem I reported is an easy one: the BMS is not in sync with the actual battery SOC. I can't have more remaining battery at destination greater than I currently show unless I conduct a recharge or the indicated SOC is incorrect.

 

[PrudentOcean]

The built-in navigation considers elevation changes, prevalent speeds, realtime traffic and weather.

Here is an example from last year. According to the battery SoC I had a range of 206 miles available and my destination was 192 miles away.

Doable with the SoC but I would have arrived with an almost empty battery.

The navigation system told me I would arrive with 14% SoC. When I got to my destination I actually had 18% or 45 miles left. Why wasn’t the battery almost empty? Because there was a significant elevation drop from the start of the drive to the destination, something the navigation system took into account.

 

[PrudentOcean]

The Porsche Charging Planner fully integrates topographical elevation changes when calculating routes for electric models like the Taycan and Macan Electric. It factors climbs and descents—along with real-time speed, traffic, and battery state of charge (SOC)—to plot precise charging stops and precondition the battery. [1, 2, 3]

How Elevation Affects the Planner

• Dynamic Adjustments: When mapping a route, the system measures the overall elevation gain to calculate the energy load. Uphill sections will dynamically increase the anticipated battery consumption, while downhill driving uses regenerative braking to recoup some of that power. [1, 2, 3, 4]
• Arrival SOC Estimates: The planner aims to get you to your destination (or the next charger) with a safe reserve, automatically compensating for mountain passes or steep highway climbs. [1]
• Battery Pre-Conditioning: Because climbing mountains requires heavy energy output, the system factors in the heat generated during the drive so the battery is optimally preconditioned for ultra-fast charging upon arrival. [1]

Alternative Navigation
If you prefer to use the ecosystem of your smartphone, you can also connect the My Porsche app to use Apple Maps EV Routing. This interface similarly reads real-time vehicle data and analyzes elevation changes along your planned route. [1, 2]

Tips for Best Accuracy
If you notice the planner consistently underestimates your required charge (especially in areas with drastic changes in elevation), you can manually tweak your navigation parameters or ensure your navigation software is up to date.

 

[GasStation]

What is the source of the information you posted?

My Porsche app downloaded owner’s manual does not display that info but does mention the content being created using AI.

Not trying to be rude with you nor trying to discredit your contribution. I am simply trying to figure out how this expensive EV I am stuck with for another two years works as the manufacturer is not providing the information to the owners or dealer.

 

[PrudentOcean]

What is the source of the information you posted?

https://www.porsche.com/internation...arging-and-range/charging/charging-on-the-go/

https://newsroom.porsche.com/en_US/products/taycan/range-18560.html

Also, the screenshots of my trip from Baker, California to Santa Monica, California demonstrate that elevation changes are taken into account as part of the planning. Going south from Baker you travel uphill for many miles, but overall you lose quite a bit of elevation on that trip, mostly in the Cajon Pass where you drop from almost 4200 feet down to 1400 feet. My final destination in Santa Monica is just above sea level.

The range shown alongside the battery SoC only considers your recent consumption, whereas the route planner knows where you're going and can consider additional factors and therefore show a substantially different range.

Finally, the route planner can display a blue outline of the places that are reachable with the current SoC. As you can see below it's not a perfect circle for me -- that's because it considers traffic as well as elevation changes. I could drive along the coast with no elevation change and drive well past Santa Barbara, but if I wanted to drive I-15 to Las Vegas I would need to make the climb up the Cajon Pass where I would expend a lot more energy.

 

[GasStation]

Interesting...

I checked out the links and they are / seem directed towards and for the Taycan.

The Macan does not have an intelligent route planner and from what I have observed, it is mostly disingenuous at best.

As far as your claim for taking "weather" into consideration. Porsche does not reference "weather" but mentions: Route profile (topography), Temperature (OAT), Aerodynamics (½ 𝞺V²Cd), A/C use, Driving style and Road surface including wheel size. When I read about weather and EV consumption, I most definitely include wind.

Topography: about the elevation / topographical changes, here's what Porsche states and I quote:

"... the topography of the landscape you are currently driving through as well as your personal driving behaviour are taken into account in real time when calculating your range display."

Non-partisan, real world, non-technical translation: when you're climbing mountains, you press the accelerator and the power consumption increases and when you descend, it decreases, all of which will be taken into consideration by the route planner for your range display. Don't read more into that...

There exists software that includes topographical information and it is called Ground Proximity Warning System (GPWS), also named Terrain Awareness Warning System (TAWS). Most commercial aircraft have it loaded into their FMS (Flight Management System). The objective is to warn the flight crew of potentially hazardous situations, such as a collision with terrain. Given Porsche's reluctance to include a functional BMS, I doubt our route planner has the terrain database.

Temperature: The entire battery pack and its' range is definitely affected by outside air temperature. We all understand that part.

Aerodynamics (½ 𝞺V²Cd): Most motorcyclists out there indirectly understand the concept that drag increases with the square of the speed: if your speed doubles, drag becomes 4 times larger. Just like an airplane, an EV has a speed range where it will "glide" best through the airflow. My guess, as observed on my e-consumption, it is between ~70-80 km/h, all other variables being constant.

When you referenced weather, I taught about wind and there lies the BIG difference. Porsche DOES NOT take wind into consideration. Our friends at ABRP (A Better Route Planner) are trying incorporate that variable which last I heard, was not attainable for us grazing bottom feeders, as one needs a dongle / app but the Porsche does not want to play.

A/C: we all know that, right?! To gain range, turn off the air conditioner, use your steering and seat warmers to keep warm and when the windshield fogs up, stop breathing.

You're right about the blue outline but it takes into consideration where there are roads. You can't go where you can drive.

Road surface including wheel size: Any road contamination and its' depth, such as: drizzle, rain, snow, gravel, mud, sand, etc., basically anything that will tend increase friction will directly reduce range, and that includes your tire tread and those $4,000 extra 21" or 22" fancy wheels. I got the 21", duh!

Traffic - sure, Google gets that for us and the whereabouts of the charging stations, well they're all over us to get our money. It's free data for all to grasp for free.

 

[ChrisFromUK]

Topography: about the elevation / topographical changes, here's what Porsche states and I quote:

"... the topography of the landscape you are currently driving through as well as your personal driving behaviour are taken into account in real time when calculating your range display."

Non-partisan, real world, non-technical translation: when you're climbing mountains, you press the accelerator and the power consumption increases and when you descend, it decreases, all of which will be taken into consideration by the route planner for your range display. Don't read more into that...

There exists software that includes topographical information and it is called Ground Proximity Warning System (GPWS), also named Terrain Awareness Warning System (TAWS). Most commercial aircraft have it loaded into their FMS (Flight Management System). The objective is to warn the flight crew of potentially hazardous situations, such as a collision with terrain. Given Porsche's reluctance to include a functional BMS, I doubt our route planner has the terrain database.

I suspect you are being unduly pessimistic of the route planners capability.

When I plot a route to a car park I walk from regularly it says it will take 6% charge to drive the 11 miles to get there. When I plot a route from that car park back home the planner says it will take 1% to get there. The car park is seriously up hill from home. It is certainly taking topography into account when route planning.

Sponsored