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50kW stations show too long charge times, (corresponding to a much lower charge power of 30-37kW)

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Tomáš Komárek

All 50 kW stations I tried to use in my plan show too long charge times (with multiple different cars and of multiple different providers i tried). The times would correspond to a much lower charge power of 30-37kW (depending on circumstances and station chosen, even with the same car).

I'm aware these stations are typically limited to 125A, meaning most cars cannot really draw full 50kW. Only a few cars with higher pack voltage (within the 400V architecture) can do it, like my e-208 that can pull 50kW from about 20% onwards as the voltage exceeds 400V. I can confirm that was the case when I actually used the same 50kW stations that report too long times. I got 50kW.

Anyway, most cars are able to pull somewhere between 40-45kW when limited to 125A. The time currently reported by ABRP is way too pessimistic for all of them.

Workaround: setting the charge power to 50kW manually in the relevant field in the plan results in a much better estimate (about 48kW when calculated from energy/time).

Proposed solution:
Simple: set the real charge power used in the calculation to 50kW, or around 45kW, as a middle ground.
Complicated: Keep information about nominal pack voltage for each car and adjust the power accordingly based on the expected (or known) current limit. Alternatively, log how fast each car charges at 50kW stations and use that for the car model at all 50kW stations.

Note that I used the actual charge time, not counting into it the charge stop overhead (set to 2min). For the included screenshot, from the charged energy and time spent information:
21.4[kWh] ÷ (44/60)[h] = 29.2[kW].

I tried modifying the starting and outside temperatire too, just in case it was expecting a cold battery. The problem remains even when the plan uses summer temperatures.