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Battery degredation?

4.8K views 23 replies 17 participants last post by  dernotte  
#1 ·
What is the range at 100% for people with 2019-2020 Ipaces? It is summer 75 degrees in my garage and a full charge nets me 211 miles range? That seems low. Is the only real way to know to get a battery test at the dealer?
 
#4 ·
This morning, after a full charge, 377km-234mi with comfort/AC on. With eco/AC off, I got 405km-251mi. I have a late 2018 with 20" tires.
Mainly city drive during the week.
 
#6 ·
Anywhere from 230-260miles on a full charge depending on driving conditions (highway or local roads). Everyone is different in their driving style (speed, acceleration, weather), thus there is no definitive answer to your question.
A better question is "what is the charge of a full battery?" that would address any concerns regarding battery health. How you use your electrons is a matter of personal preferences.🙂
 
#9 ·
Best way is to drive at as a near constant speed as possible, then compare the reduction in SOC(%) with the amount of kWh used. For best accuracy you should drive until you reach a SoC of 10%.

If I do that I find my usable net battery capacity to be between 65kWh (winter) to 80kWh (summer).
 
#10 ·
Don't pay a lot of attention to the range meter. I think you are a fairly new owner (?), and the range fluctuates a lot over time. You will get a feel for the range of your car in different situations. Mine has varied from 250 on the highway to about 175 on the highway (equal temperatures, but driving into a very stiff wind). Of course cold temperatures really hurt range.
 
#11 ·
At 75mph with aftermarket 22" wheels, in my 2019, with California weather

Summer = 210 miles max
Winter = 180 miles max

It would be a waste of time and resources to take your car to the dealer for a battery test. It is operating normally.
 
#12 ·
Re our 2019 SE: Leaving our 85 deg F garage this morning to drive to Charleston, SC (about 80 miles) we had 270 Miles on the guessometer. Drove there and back in 90 + deg F sunshine and had 68 miles available when we got home. Drove speed limit plus 5 MPH mostly in Comfort mode sometimes with A/C at Max.
 
#17 ·
Guessometer, LOL! This is our issue as the milometer does not reflect the distance driven and the miles shown when charged to either 80% is always different. The garage temperature is around 90F and outside temperature is higher. This scenario is very frustrating and when talking to the service manager at Jaguar, her response was that it's crap.
 
#13 ·
Here in S. Arizona, summer range is about 200 miles. I just drove a trip of 145.5 miles and SOC went from 100% to 27%. Mostly interstate at ~75 MPH. Outside temperature was about 100F. Car was in "comfort" mode. 2020HSE on 20" wheels and factory tires. I get closer to 240 miles when it cools down outside.
 
#16 · (Edited)
I have similar numbers, also with a '20 HSE on 20", about the same weather as in Arizona.

145.5 miles (199.3 km) on 73% means 145.5 miles on 61.8 kWh (the battery is 90 kWh gross but usable is 84.7 kWh) so power consumption is 42.5 kWh/100 miles (26.4 kWh/100 km). This gives a theoretical maximum range of 199.3 miles (320.8 km) if you go from 100% to 0% (covering all of the accessible 84.7 kWh, not the 90 kWh which the car cannot use!) - but no one really depletes the battery to 0%, right? so I'm always a bit puzzled to hear others report ranges of around 250 miles (400 km), as the SoH of my car's battery is confirmed by Jaguar to be "within OEM tolerances", over 95% of my charges are done with a 7 kW home charger and I don't drive aggressively.

Usually I stay within the 20%-80% SoC and this 60% battery usage gets me regularly around 120 miles (193 km) between top ups.
 
#15 ·
2019 FE with just over 20000 miles, had it 3.5 years. I still get roughly 230 miles on a full charge in normal suburban driving with the AC (or occasionally the heat) on. If I’m driving mostly on the highway at 70-75mph in the Phoenix summer with the AC blasting, I get 200 miles.

Recent dealership report shows battery cells with avg 92% of their original rated capacity.
 
#21 ·
I am always surprised how bad is the GoM and the estimate % on arrival when I use the onboard satnav system. When I am on the highway , cruising at the same speed since 30 min, I know my average consumption, remaining Km to destination, I do the simple math, and get a much more precise number than the one on the dash, based on numbers that the car knows and provides me.
 
#22 · (Edited)
My GoM is reasonably accurate for low to medium speed highway (not freeway) driving. I'm attaching an example of that here.

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I used exactly 59kWh for that trip. My capacity at full is 81kWh. So this was 59/81 = 73% of full charge.

So I traveled 184.2 miles using 73%, at a decent average speed ... and what you can't see is that this average was due to a very tight distribution of speeds, between 30 mph and never over 62 mph.

So my range was 184.2 miles / 0.73 = 252 miles!

And notice that the measured efficiency was apparently 32.9 kWh / 100 miles, implying a range of 81 kWh / 0.329 kWh/mile = 246 miles.

In stark contrast, the next segment on that same day, on I-5, was at an average speed of 64 mph, with a lot of miles at 75 mph and a measured efficiency of 39.9 kWh / 100 miles. I used 61.2 kWh for that segment, implying a range of 149.5 miles / (61.2/81) = 198 miles. Which is very close to the ~200 miles implied by the consumption estimate (which btw is always off a bit more when there is high variance in speed along a route).

The GoM was always somewhat wrong. The first trip above was after a high speed high consumption day, so the GoM somewhat underestimated my range. The next day the GoM way overestimated my range by a lot because the day before it was so efficient and now I was hammering it.

I've made it a habit to watch the GoM decrease and match that up with the number of miles driven, to predict the trajectory.

For example: the first 50 miles of driving cost me 60 GoM miles; so if I have another 100 miles to go, I need to subtract 20 miles from the GoM to see how much I have left when I get to the charger.

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