SOC range calculation vs. odometer info... - Jaguar I-Pace EV400 Forum
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post #1 of 48 (permalink) Unread 02-02-2020, 04:08 PM Thread Starter
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SOC range calculation vs. odometer info...

I decided to run my SOC down almost all the way to check the range stated after the dealer software update. Usually I plug in at home when I get to a 100 mile GOM stated range. That is needlessly cautious, considering 100 miles is at least a week of my normal driving need. (Since I'm retired and have no commute to work.)

So I reset Trip A to zero as I always do, for the odometer to track the actual miles driven, and I'm down to 39 miles left says the GOM. I can take it down a little more, but I'll charge at 10 miles.

Here's a difference from the SOC to the odometer I'm seeing.

I'm down to 16% SOC. Working it backwards, dividing the remaining range from the GOM by 0.16, implies 243 miles at 100% SOC, about the 245 range I started with. So it matches close enough. But adding the GOM range now to Trip A is around 200.

I did do some dynamic mode driving early in the charge, including repeated hard acceleration. Maybe that ate up the difference, and the GOM/SOC is accurate as to my normal driving, averaging now back to that kind of battery draw?

I also noted my regen figure for this driving period which I normally ignore, which has been 22 kWh to this point.
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post #2 of 48 (permalink) Unread 02-02-2020, 07:23 PM
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I did something similar. I charged on a Sunday night drove all week to and from work & around in LA area. Drove down to about 37 miles on the GOM/SOC. Then went to the App (In Control) added up all the mileage from my trips that week. When added back the 37 miles from the GOM the total was about 240. This is after the H.264 upgrade with aggressive & stop & go LA driving in mostly Dynamic mode. Temperature was in the 50s-60s last week mostly.

Your mileage may vary.
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post #3 of 48 (permalink) Unread 02-02-2020, 10:09 PM
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Be careful to watch the SOC more than GOM. I had it drop from 50km to 30km, then form 12 to 0 without warning. I was not paying enough attention to the SOC and almost ended up pushing my car to the charger.
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post #4 of 48 (permalink) Unread 02-03-2020, 09:28 AM
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I did a similar experiment, running my post-H264 2020 HSE down to 1% in all city driving on ECO mode. At 100 mi driven, all calculations pointed to about 255 mi range. At 205 miles driven, I had 14% and 35 miles left (between 240-250 mi range, depending on which calculation made). However, I left for a 22 mile round trip at that point (a little anxious), and returned with 2 miles and 1% left (even more anxious). So the GoM dropped from 35 to 2 on a 22 mile trip at the very end. Result was 229 mi range (227 driven + 2 left on GoM). Upon recharging to 100%, GoM read 257 mi, down from 261 on its first post-H264 full charge.

I intend to attempt the same experiment this week on 'Comfort Mode'.
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Last edited by dtgsrq; 02-03-2020 at 09:32 AM.
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post #5 of 48 (permalink) Unread 02-03-2020, 12:14 PM
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I've also been keeping an eye on "Sudden Pessimism Syndrome" (SPS) where GOM seems less favorable as I work my way through a charge. . . causing me to wonder about potential front-end "Optimism" newly built into the programming. Also, between Eco, Comfort and Dynamic modes, GOM shows 2 miles in variation. Finally, 240 seems to be the steady winter GOM range at 100%. Will keep tracking against odometer.
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post #6 of 48 (permalink) Unread 02-03-2020, 02:01 PM
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Has anyone actually driven more than 240 miles on one charge? Pre or Post H264?
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post #7 of 48 (permalink) Unread 02-03-2020, 03:25 PM
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Quote:
Originally Posted by John Eh View Post
Has anyone actually driven more than 240 miles on one charge? Pre or Post H264?
and most usefully, as It is the only time range really matters, has it been 240 miles down the interstate at ‘normal’ highway speeds ~75mph?
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post #8 of 48 (permalink) Unread 02-03-2020, 03:38 PM
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Quote:
Originally Posted by Dantrium View Post
and most usefully, as It is the only time range really matters, has it been 240 miles down the interstate at ‘normal’ highway speeds ~75mph?
A lot of people have driven more than 240 miles. I have personally driven more than 250 miles. The best I have seen documented is 295 miles. You won't see such numbers driving on a highway of course.
At constant speed of 60 miles/h you should get around of 240 miles in good conditions with an I-Pace with 18 wheels. I have seen this documented with a HSE with 20 wheels. It was done as a round trip starting and ending at the same point in calm winds and nice temperature in low power mode (no AC).

But you don't really drive like that so normal range is a lot less of course.
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post #9 of 48 (permalink) Unread 02-03-2020, 06:33 PM
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Today's freeway drive suggests I'm not getting 240 miles at a steady 65+ mph with temps <60F. More likely 200 - 220. Recent experience suggests well over 240 for mixed driving with temps >60F. My personal range target is a round trip on Hwy 1 (PCH) to San Simeon and back, ~ 260 miles. I'm thinking it might be doable with warmer temps. In any case, current state of play is pretty good for me (take other SUV for rare longer trips).
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post #10 of 48 (permalink) Unread 02-03-2020, 06:50 PM
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I've always wondered about the feasibility of an exteme eco mode which limited horsepower and torque to something like half or perhaps switched off one motor entirely. I wonder what effect that would have on range.
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