Charging loss %

[apu]

Just curious, do these apps display error codes when encountered ?

It might read engine related MIL codes which in the Kona I am not sure how useful that would be. I find even though a newer stand alone scanner typically serves you better than a bluetooth dongle/app you might still have issue getting much of anything out of the Kona electric. Its seems different in how it wants to let you access the body module, ABS, SRS and even my latest/greatest handheld scanner is having trouble communicating with its assorted computers.

 

[KiwiME]

Likely because there is a "gateway" (firewall) between the OBD2 and the multiple CAN busses.

 

[ericy]

TP is supposed to but I've never used that function. You would have to set that up to tell you in any case.

I tried SoulEVSpy Lite with my generic translucent blue dongle and did get plausible numbers. It does look useful for monitoring in realtime and is certainly far easier to configure than TP. But unless the pay version has logging I'll still have that use for TP in addition to its excellent dash customisation options.
I'll need to buy the recommended dongle for SoulEVSpy because mine kept disconnecting.

Yes, paid version of SoulEVSpy has logging. I don't recall what the free version does - it might also do this.

It really just writes a file to phone storage when you use the thing. Useful for troubleshooting, if nothing else.

Edit: look in /Download, or /storage/emulated/0. File names would be SoulSpyData.<time>.csv and SoulSpyLog.<time>.txt.

 

[apu]

Likely because there is a "gateway" (firewall) between the OBD2 and the multiple CAN busses.

Yeah likely, it just means I will have to buy yet another scanner at some point, hopefully I won't have need for it for a few more years.

 

[Toolworker]

I couldn't find Kona specific references but according the linked article depending on temperature and amount charged Level 2 efficiency is around 89.4% and Level 1 is around 84%. If you charge less than 4Kwh it was worse Level 2- 87% and 74% at level 1. Efficiency gains of Level 2 charging also increased under low (< 50°F) and high (> 70°F) temperatures.
https://ieeexplore.ieee.org/document/7046253

Over my 2020 Kona's first 500 miles, the dashboard display reports 4.4 mi/kWh, presumably based on power drawn from the battery. Using power reported by the Level 2 EVSEs, it got 3.91 mi/kWh.

This would make the charging efficiency 89% (plus or minus 1% because the car display rounds off), which is consistent with @apu's figure.

Temperature while charging was in the 50's.

 

[FloridaSun]

Over my 2020 Kona's first 500 miles, the dashboard display reports 4.4 mi/kWh, presumably based on power drawn from the battery. Using power reported by the Level 2 EVSEs, it got 3.91 mi/kWh.

This would make the charging efficiency 89% (plus or minus 1% because the car display rounds off), which is consistent with @apu's figure.

Temperature while charging was in the 50's.

So, it looks like 10% loss is a reasonable figure.. Thanks!

 

[Maple]

I tried my level one home charger. The charging power is 1.4kw it took 60hrs to full charge the efficiency is around 76% I am wondering why it is so low. I found the On board charger is hot all the time. I don’t think the hot temperature is caused by the charging current. 12A current can not creat that temperature. Looks there is heater inside the charging system heat the on board charger. When I use my 32A level two charger I saw the same hot on board charger because it is 32A I thought it maybe reasonable. The 32A charging efficiency is around 90%. I prefer use small current to charge battery to extend the battery life when I am at home but when I found the very low efficiency of level one charging I give up. Not sure wether other EVs have the same low efficiency by using Level one charging. Hyundai engineer should do something to improve it.


Sent from my iPhone using Inside EVs

 

[apu]

120V charging with the granny cable is indeed less efficient but typically we are talking about a loss of only ~2-5% more than 240V EVSE which are typically around 90%. 76% seems quite low. FYI Hyundai's official spec for the onboard charger efficiency is 91% regardless if the source is 120 or 240V.

 

[navguy12]

What is the normal loss from the EVSE to the car?
Last night, I charged from 30 to 80% and the EVSE showed 35.5 kwh delivered to the car.
This means 50% of charge for 35.5 kwh, which would be 71 kwh for 100%. If the loss was 10%, it would be 64 kwh but is the charging loss only 10% or is it more? Trying to figure out if I have any battery degradation yet after 17500 miles.

For what it is worth:

From 90% to 100% SOC, this was the draw from the grid (temperature @ 24c):

...so another data point, which would work out to a 72.5 kWh push from the grid to fill up frm 0% to 100%...although I prefer to measure a large uplift (say from 30% to 90% for example) for a more accurate snapshot.