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I just remembered that EPA measures EVSE kWh. They show 25kWh to fully charge a new 500e from zero*, which would mean you're at 75% capacity after resetting your % gauge. This seems very close to your numbers above. I'm a bit disappointed by this, but maybe someone can show that it's not that bad.


* 2013-15: "87 miles total range" times "29kWh/100mi" = 25kWh used by EVSE for full charge from zero.
2016-19: "84 miles total range" times "30kWh/100mi" = 25kWh used by EVSE for full charge from zero.
Unfortunately that's certainly what seems to be the case. It's not such a huge deal for me, as I only really drive the car back and forth to work (8-12mi each way depending on the route I take), and typically charge everyday.
The extra bit of range would be nice for when I would like to take the car our on weekends and such, but oh well 🤷‍♂️. I'll continue to try and keep an eye on things and see if it improves at all.
 

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Discussion Starter #102
@ajbessinger this is what is the most important - the range is more than you actually need.

Also, let's see if the U69 will change anything, when you will find time for it.
 

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2017 Fiat 500e (Billet Argento), 2015 VW Golf Sportwagen TSI 5MT (Tungsten Silver), 2002 Honda VFR
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I was a lil nervous about setting off earlier as I know it’s pushing what this car was rated for but I wanted to see how far my Fiat would do on one charge so I set off at 99% earlier and drove 93.1 miles 30% city, 10% freeway traffic, 60% freeway doing 65-70mph not bad 5.3mile/kw avg. I still had 16% but all my errands and day was over. Today’s temp in socal was mild 70s no ac was used.
108770
 

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Discussion Starter #104
Just an update: today on the way downhill I was getting 0 kW charge, so I reckoned the battery was full to the brim. Plus, it was +20 C outside, which ruled out the need for cooling or heating the HV. So I plugged in the OBD and here's what I got (47K something km on the clock):

Stable 57.3 Ah total capacity. At 100% dash SOC it was 98% OBD (397-398 V). GOM was very excited and showed 191 km on full charge. Extrapolated charge consumption 21 kWh (0 to 100 dash, at +20 C, so supposedly no heating).

Kinda looks to me that the usable physical SOC range is 5% to 98-99% OBD.

Oh, and one more interesting quirk. The "avg. energy" indicator does not go above 16.1 km/kWh (10 mi/kWh). So you can go downhill all the way and use negative amount of energy, but you will still be capped at those 10 miles. Man, I'd like to see the coders who came up with this idea.
 

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2017 Fiat 500e (Billet Argento), 2015 VW Golf Sportwagen TSI 5MT (Tungsten Silver), 2002 Honda VFR
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Lol well my VW goes downhill with no gas pedal shows 99.9mpg
 

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OBD...Stable 57.3 Ah … Extrapolated charge consumption 21 kWh (0 to 100 dash …. looks to me that the usable physical SOC range is 5% to 98-99% OBD.
Note that this is without recalibrating the % gauge by going SUB-zero to 100.00%*. That calibration might allow usable range from 0% to 100%.
* Drain to DC-DC cutoff, fully charge, then open/close left door & continue charging.

0 to 100 charger consumption of 21kWh is only 84% of EPA's 25kWh.
5% to 98% consumption of 21 is 90% of EPA.

Amp-hours on OBD is pretty much meaningless, since someone reported theirs going UP.
 

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I did this experiment today where I ran it to below zero and then charged it all up again.

Looks like the total amount of power delivered was 21.78kWh, (It took 185.1 minutes to charge at an average of 7.06kW) which would be 19.6kWh at 90% efficiency. I have 51,761 miles on the odometer, and this is a 2013.
 

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21.78 charger kWh is 87% of the original 25 for a new one. In other words, 13% range loss, which is 2.5% per 10k mi

Did you discharge it all the way to DC/DC cutout? (12V warning, or 12.x volts on OBD or multimeter)
 

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I've been doing some more testing, and logging my findings into a spreadsheet. So far I've only got half a dozen data entries, but so far the data points to me having over 26% degradation (or about 15.5kWh of usable capacity) as I suspected.
I also finally got an OBDii adapter that is compatible with ALFAOBD. I'm still trying to figure how how to use the app properly and export data logs, but I did find the Ah capacity and that seems to be somewhat inline with my findings as well as it is reporting a full capacity of 45.10 Ah (which is 71% of 63 Ah). It also lists 3 different SOH percentages, I'm not sure what they mean, but here they are:
HV Bat SOH: 38.43%
HV Bat SOH-R: 73.33%
HV Bat SOH-C: 69.41%

Anybody know have advice on how to export the full logs so that I can share them here?
 

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If you are using an android phone, look here: internal storage/android/data/com.android.alfaobd/files/logs
file should be BPCM_Info.log
It stores the logs all in one file. The most recent being at the end.
 

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21.78 charger kWh is 87% of the original 25 for a new one. In other words, 13% range loss, which is 2.5% per 10k mi

Did you discharge it all the way to DC/DC cutout? (12V warning, or 12.x volts on OBD or multimeter)
I discharged it to the point that it would not move and then some, though I suppose I could have run it down a little bit more.
 

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Unfortunately, users report that taking it "only" a little below zero doesn't recalibrate the % gauge on which we're basing battery health.

We seem to need to go til it stops charging the 12V, indicated by a display warning, or better yet by 12.x volts on OBD or multimeter.

I too have NOT done that, but based on charger use at 24,954 miles my 2013 shows 90% of new capacity, which is 4% per 10k mi.
 
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