[Andy at Ross-Tech.com]

So far I have charged at EA 18 times and gotten 565 kW of free juice from about a dozen different chargers. One of the most frustrating aspects of ID.4/EA is the mystery of exactly how fast you can expect to charge when you get to a charging stop. In general if the car’s SoC shows 35% or less, the full 125kW is likely (but not always, due to who knows what combination of the car or charger happiness). If I plug in between 35% and 60% there’s usually a pretty linear curve down to 57kW. There definitely seem to be specific kW that repeat themselves from charging session to charging session.

Here is a graph of all of my initial SoC and initial kW. In my experience after the first minute the kW will NEVER get faster so if you are getting below expected try changing to a different pump if possible, that has improved results for me in some cases and hasn’t hurt.

Notice this curve is similar but different from the expected ideal charging curve if you plug in at low SoC and graph all of the data up til you unplug:

I log this data with VCDS but it’s simple enough to just take pictures of the EA screen at regular intervals to record the time, kW, and SoC.

 

[mochalatte]

Here is a graph of all of my initial SoC and initial kW. In my experience after the first minute the kW will NEVER get faster so if you are getting below expected try changing to a different pump if possible, that has improved results for me in some cases and hasn’t hurt.

A good tip--consistent with what I've seen elsewhere but good to see it backed up by data. Thanks for the data. Looks like you've had good charging sessions from the start 14 of 18 times.

 

[Andy at Ross-Tech.com]

@mochalatte Yep! Most of the time I got decent power and if not, switching pumps usually fixed it.

 

[Mark Magiera]

Andy,

Nice charting of charge curves. There is an element to your data that would be key: Time of session.

One of the stronger benefits of starting at a lower SoC is that the delivery of energy to the pack is most efficient in cutting down recharge time when traveling. Which you will recall when you first started commenting about the output to your ID from an EA, I told you that you were initiating your charge session with too high a SoC%.

I've benefitted from riding that 125kW wave in leap-frogging from station to station. Ultimately saving my back from being too still for full discharge travel cycles. Sure I could go 220+ miles on a full discharge cycle & drive for 3-ish hours with an hour charge cycle OR I could ride that 125-70k wave from below 18%SoC start to 75%SoC (or less, depending on the next EA station distance) & drive 2 hrs with a 30 minute session. In my 2nd example, I save an hour. ***NOTE: on all Interstate Routes of Travel

Whereas, yesterday I traveled from Maine to VT over the Kancamagus Highway. Top Posted speed on my entire route was 50. Average speed was 42 for the 142 mile route & my ID4 arrived with an average consumption of 3.8 miles/kW for the trip. My wife was in the e-Golf drafting me & the e-Golf got 5.3 miles/kW for the same trip. Just wish the e-Golf got the same charge speed as the ID4 does...

~M

 

[Andy at Ross-Tech.com]

@Mark Magiera hopefully this table format works:

Sheet #	Date	Location	Ambient *F	Start Batt *C	End Batt *C	Begin SoC	End SoC	Minutes	Kyle's peak	Peak kW	Total kWh	Cost	KwH/min
210322-01	3/22/21	EA at KoP	66	17.5	17.5	47%	48%	1	100	87	1	$0.00	1.0
210322-02	3/22/21	EA at KoP	66	17.5	30	48%	90%	39	100	58	33	$0.00	0.8
210329-01	3/29/21	EA Allentown	54	18.5	30	24%	100%	64	125	94	59	$10.00	0.9
210403-01	4/3/21	EA at KoP	55	17	22	47%	67%	18	100	56	15	$0.00	0.8
210403-02	4/3/21	EA at KoP	55	22	24.5	67%	80%	12	70	51	9	$0.00	0.8
210411-01	4/11/21	EVgo Conshy	61	17.5	19	72%	80%	10	65	44	6.9	$3.00	0.7
210424-01	4/24/21	EA at KoP	72	23	41	10%	90%	46	125	125	64	$0.00	1.4
210516-01	5/16/21	EA at Bedford	51	25	33.5	8%	32%	14	125	127	20	$0.00	1.4
210516-02	5/16/21	EA at Bedford	54	33.5	???	33%	98%	50	120	116	52	$0.00	1.0
210516-03	5/16/21	EA at Carlisle	71	???	???	68%	81%	14	65	54	11	$0.00	0.8
210516-04	5/16/21	EA at Pottstown	73	28	33.5	45%	85%	30	105	81	32	$0.00	1.1
210529-01	5/29/21	EA Plymouth Mtg	51	11	14	72%	87%	32	65	35	15	$0.00	0.5
210531-01	5/31/21	EA Cherry Hill	79	22	27.5	61%	79%	18	75	55	15	$0.00	0.8
210606-01	6/6/21	EA Plymouth Mtg	93	30	32	72%	85%	15	65	55	12	$0.00	0.8
210705-01	7/5/21	EA at Carlisle	77	30	36	47%	77%	24	95	86	27	$0.00	1.1
210705-02	7/5/21	EA Woodstock, VA	87			20%	80%	31	125	127	46	$0.00	1.5
210705-03	7/5/21	EA Fincastle, VA	86	34	34	28%	30%	2	125	32	1	$0.00	0.5
210705-04	7/5/21	EA Fincastle, VA	86	34	47	30%	63%	17	125	125	28	$0.00	1.6
210709-01	7/9/21	EA Fincastle, VA	76	???	???	80%	97%	26	60	34	14	$0.00	0.5
210709-02	7/9/21	EA Hagerstown, MD	89	???	???	20%	97%	52	125	127	63	$0.00	1.2
210805-01	8/5/21	EA Franklin Mills	79	26	32	57%	83%	25	80	64	23	$0.00	0.9
210905-01	9/5/21	EA at Pottstown	68	22	29	60%	87%	31	75	56	25	$0.00	0.8
210912-01	9/12/21	EA Plymouth Mtg	88	26	32	62%	83%	21	75	58	18	$0.00	0.9
211227-01	12/27/21	EA Plymouth Mtg	42	21	21	16%	16%	1	125	35	0	$0.00	0
211227-02	12/27/21	EA Plymouth Mtg	42	21	40	16%	80%	35	125	118	52	$0.00	1.5
211231-01	12/31/21	EA Plymouth Mtg	52	13	14	62%	69%	8	75	42	6	$0.00	0.8
211231-02	12/31/21	EA Plymouth Mtg	52	14	16	69%	80%	14	70	44	9	$0.00	0.6

Edit: Updated table for new charging sessions.

 

[Andy at Ross-Tech.com]

Another datapoint, yesterday I plugged in with 62% SoC and got 58kW. It didn't taper off much as I charged it to 85%. If I had plugged in at say 25%, by the time I got to 62% I would still be pulling maybe 80kW, based on past history.

 

[Andy at Ross-Tech.com]

Looking over my charging experience, I have a dubious theory that it is not a good idea to plug into a charger that has both a CCS and CHAdeMO. It may just be coincidence but those units have gotten me less than expected charge speeds if I got them working at all. In general I try to leave those chargers alone out of courtesy for any Leaf/etc folks who might show up, but in some cases it was necessary. Just my $0.02.

 

[DrewMcG]

Looking over my charging experience, I have a dubious theory that it is not a good idea to plug into a charger that has both a CCS and CHAdeMO. It may just be coincidence but those units have gotten me less than expected charge speeds if I got them working at all. In general I try to leave those chargers alone out of courtesy for any Leaf/etc folks who might show up, but in some cases it was necessary. Just my $0.02.

At the EA station in Ypsilanti, MI, the combined CCS/Chademo unit is consistently one of the most reliable/“faster,” but not great, chargers. Bummer b/c normal etiquette is not nor to occupy this unit with a CCS vehicle when there are 5 other CCS-only units available, in case a Leaf, etc., pulls up. I

I suspect a flacky CCS on the unit you’ve had issues with. One advantage of the dual-cord CCS units is that each cord is used approx. one-half the time, with one-half the wear and tear. Especially in summer, when cable cooling is more critical, limited cooling due to bad or weak cable could explain lower charge rates.

 

[DrewMcG]

@Mark Magiera hopefully this table format works:

Sheet #	Date	Location	Ambient *F	Start Batt *C	End Batt *C	Begin SoC	End SoC	Minutes	Kyle's peak	Peak kW	Total kWh	Cost	KwH/min
210322-01	3/22/21	EA at KoP	66	17.5	17.5	47%	48%	1	100	87	1	$0.00	1.0
210322-02	3/22/21	EA at KoP	66	17.5	30	48%	90%	39	100	58	33	$0.00	0.8
210329-01	3/29/21	EA Allentown	54	18.5	30	24%	100%	64	125	94	59	$10.00	0.9
210403-01	4/3/21	EA at KoP	55	17	22	47%	67%	18	100	56	15	$0.00	0.8
210403-02	4/3/21	EA at KoP	55	22	24.5	67%	80%	12	70	51	9	$0.00	0.8
210411-01	4/11/21	EVgo Conshy	61	17.5	19	72%	80%	10	65	44	6.9	$3.00	0.7
210424-01	4/24/21	EA at KoP	72	23	41	10%	90%	46	125	125	64	$0.00	1.4
210516-01	5/16/21	EA at Bedford	51	25	33.5	8%	32%	14	125	127	20	$0.00	1.4
210516-02	5/16/21	EA at Bedford	54	33.5	???	33%	98%	50	120	116	52	$0.00	1.0
210516-03	5/16/21	EA at Carlisle	71	???	???	68%	81%	14	65	54	11	$0.00	0.8
210516-04	5/16/21	EA at Pottstown	73	28	33.5	45%	85%	30	105	81	32	$0.00	1.1
210529-01	5/29/21	EA Plymouth Mtg	51	11	14	72%	87%	32	65	35	15	$0.00	0.5
210531-01	5/31/21	EA Cherry Hill	79	22	27.5	61%	79%	18	75	55	15	$0.00	0.8
210606-01	6/6/21	EA Plymouth Mtg	93	30	32	72%	85%	15	65	55	12	$0.00	0.8
210705-01	7/5/21	EA at Carlisle	77	30	36	47%	77%	24	95	86	27	$0.00	1.1
210705-02	7/5/21	EA Woodstock, VA	87			20%	80%	31	125	127	46	$0.00	1.5
210705-03	7/5/21	EA Fincastle, VA	86	34	34	28%	30%	2	125	32	1	$0.00	0.5
210705-04	7/5/21	EA Fincastle, VA	86	34	47	30%	63%	17	125	125	28	$0.00	1.6
210709-01	7/9/21	EA Fincastle, VA	76	???	???	80%	97%	26	60	34	14	$0.00	0.5
210709-02	7/9/21	EA Hagerstown, MD	89	???	???	20%	97%	52	125	127	63	$0.00	1.2
210805-01	8/5/21	EA Franklin Mills	79	26	32	57%	83%	25	80	64	23	$0.00	0.9
210905-01	9/5/21	EA at Pottstown	68	22	29	60%	87%	31	75	56	25	$0.00	0.8
210912-01	9/12/21	EA Plymouth Mtg	88	26	32	62%	83%	21	75	58	18	$0.00	0.9
211227-01	12/27/21	EA Plymouth Mtg	42	21	21	16%	16%	1	125	35	0	$0.00	0
211227-02	12/27/21	EA Plymouth Mtg	42	21	40	16%	80%	35	125	118	52	$0.00	1.5
211231-01	12/31/21	EA Plymouth Mtg	52	13	14	62%	69%	8	75	42	6	$0.00	0.8
211231-02	12/31/21	EA Plymouth Mtg	52	14	16	69%	80%	14	70	44	9	$0.00	0.6

Edit: Updated table for new charging sessions.

S

@Mark Magiera hopefully this table format works:

Sheet #	Date	Location	Ambient *F	Start Batt *C	End Batt *C	Begin SoC	End SoC	Minutes	Kyle's peak	Peak kW	Total kWh	Cost	KwH/min
210322-01	3/22/21	EA at KoP	66	17.5	17.5	47%	48%	1	100	87	1	$0.00	1.0
210322-02	3/22/21	EA at KoP	66	17.5	30	48%	90%	39	100	58	33	$0.00	0.8
210329-01	3/29/21	EA Allentown	54	18.5	30	24%	100%	64	125	94	59	$10.00	0.9
210403-01	4/3/21	EA at KoP	55	17	22	47%	67%	18	100	56	15	$0.00	0.8
210403-02	4/3/21	EA at KoP	55	22	24.5	67%	80%	12	70	51	9	$0.00	0.8
210411-01	4/11/21	EVgo Conshy	61	17.5	19	72%	80%	10	65	44	6.9	$3.00	0.7
210424-01	4/24/21	EA at KoP	72	23	41	10%	90%	46	125	125	64	$0.00	1.4
210516-01	5/16/21	EA at Bedford	51	25	33.5	8%	32%	14	125	127	20	$0.00	1.4
210516-02	5/16/21	EA at Bedford	54	33.5	???	33%	98%	50	120	116	52	$0.00	1.0
210516-03	5/16/21	EA at Carlisle	71	???	???	68%	81%	14	65	54	11	$0.00	0.8
210516-04	5/16/21	EA at Pottstown	73	28	33.5	45%	85%	30	105	81	32	$0.00	1.1
210529-01	5/29/21	EA Plymouth Mtg	51	11	14	72%	87%	32	65	35	15	$0.00	0.5
210531-01	5/31/21	EA Cherry Hill	79	22	27.5	61%	79%	18	75	55	15	$0.00	0.8
210606-01	6/6/21	EA Plymouth Mtg	93	30	32	72%	85%	15	65	55	12	$0.00	0.8
210705-01	7/5/21	EA at Carlisle	77	30	36	47%	77%	24	95	86	27	$0.00	1.1
210705-02	7/5/21	EA Woodstock, VA	87			20%	80%	31	125	127	46	$0.00	1.5
210705-03	7/5/21	EA Fincastle, VA	86	34	34	28%	30%	2	125	32	1	$0.00	0.5
210705-04	7/5/21	EA Fincastle, VA	86	34	47	30%	63%	17	125	125	28	$0.00	1.6
210709-01	7/9/21	EA Fincastle, VA	76	???	???	80%	97%	26	60	34	14	$0.00	0.5
210709-02	7/9/21	EA Hagerstown, MD	89	???	???	20%	97%	52	125	127	63	$0.00	1.2
210805-01	8/5/21	EA Franklin Mills	79	26	32	57%	83%	25	80	64	23	$0.00	0.9
210905-01	9/5/21	EA at Pottstown	68	22	29	60%	87%	31	75	56	25	$0.00	0.8
210912-01	9/12/21	EA Plymouth Mtg	88	26	32	62%	83%	21	75	58	18	$0.00	0.9
211227-01	12/27/21	EA Plymouth Mtg	42	21	21	16%	16%	1	125	35	0	$0.00	0
211227-02	12/27/21	EA Plymouth Mtg	42	21	40	16%	80%	35	125	118	52	$0.00	1.5
211231-01	12/31/21	EA Plymouth Mtg	52	13	14	62%	69%	8	75	42	6	$0.00	0.8
211231-02	12/31/21	EA Plymouth Mtg	52	14	16	69%	80%	14	70	44	9	$0.00	0.6

Edit: Updated table for new charging sessions.

So is your theory as to why you frequently got lower charge rates cf. Kyle Conner/ Out of Spec, that your particular EA stations are buggy, or that you got a lemmon?

 

[Andy at Ross-Tech.com]

S

So is your theory as to why you frequently got lower charge rates cf. Kyle Conner/ Out of Spec, that your particular EA stations are buggy, or that you got a lemmon?

In hindsight, I think that in most cases, battery temperature was too low for optimal charging. In a few cases EA chargers were being goofy.