Thinking on completely draining the HV Battery Pack. Thoughts?

[Timeless Epoch]

Ok guys, a quick and dumb question or maybe a dumb and quick question. Anyway I had lunch at a Hilton Garden Inn yesterday. Found out afterwards they had level 2 chargers out in back. Went out to look at the charger and NACS handle. The station digital display read "16.64 KW AC MAX".

This has me wondering with the AC to DC conversion plus this 10% cell balance crud, what would be the effective battery KWH charge that would be added to my battery per hour from this charger assuming let's say for sake of argument, a battery level well under 80%?

I'm assuming the max rate would go down from 16.64 AC as it went over 80% and other levels as it got close to 100%. It would also use the Stellar style adapter plug. Thanks.

Your truck maxes out at 11.5KW gross in for level 2 charging.

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[RickLightning]

A whole bunch of misunderstanding here...

Level 2 chargers are either NACS or J1772. With NACS, you could use a Stellar adapter.

There is no "10٪ cell balance crud". You lose ~10% in loss between wall and vehicle,so 16.64 would be around 15kW. But you max at 48amps, so 10.5kW or so.

There is no slowing down at 80% with level 2. It slows down at 99%, and THEN may do cell balancing, staying at 99% for as much as 45 min or an hour.

 

[bc1]

Clear as mud so far. My guess at a recap from above not including plug style. Truck (2025 Flash with extended battery) internal charger maxes out at 11.5 kwh per hour on level II so no matter what any external charging source is, the max I can get is 11.5 KW per hour. With an approximate 10% loss through the power cord, I would only get 10.5 KW in an hour of charging assuming 48 amps. However, I see nothing in my actual knowledge as to anything about charging at 48 amps. I don't know what amp rate they are using or how they are arriving at 16.64 which is part of my question I'm hoping someone may or may not need to know to compute the final answer. I did not get a brand of charger except the serial number of each charging station starts with BAE if that is a clue. Sorry. Thanks.

 

[Timeless Epoch]

Sounds like you are pretty clear. Yes, your truck maxes at 48A at 240v, or 11.5KWh (at the evse).

How they are arriving at 16.64KW? One would assume they have an 80A charger that is throttled to around 70A, probably due to the circuit it is on.

 

[RickLightning]

Or, they have less than 240v.

240 x 80 = 19.2kW
207 x 80 = 16.6kW.... Ding, ding, ding.

But that's irrelevant due to your max.

207 x 48 x 93% = 9.24kW would be what you will likely get, because the amperage is the restricting factor (48amps), and the lower voltage is what will drive your total.

IANAE (I Am Not An Electrician)

Truck (2025 Flash with extended battery) internal charger maxes out at 11.5 kwh per hour on level II so no matter what any external AC Powered charging source is, the max I can get is 11.5 KW per hour.

The internal charger has no impact on DC level charging.

 

[TaxmanHog]

I'm assuming the max rate would go down from 16.64 AC as it went over 80% and other levels as it got close to 100%

At peak flow up to 97+% it should net 10.4 kWh on a 240 volt circuit to the HVB after approx 10% conversion loss AC/DC, then the last 3% of charging during balancing phae, it's a crap shoot as to the gross energy consumed to achieve 100% top off.

-edit-

As Rick points out the high likelihood that 3 phase energy at the hotel is limiting you to gross energy of 9.936kWh [48 amps x 207v}net to the HVB will be ~90% of this value or 8.942 kWh.

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