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Re: Type 2 vs CCS charging speeds

Posted: Wed Jan 13, 2021 10:53 am
by Thundarian
Is the charging speed consistent when using a three pin plug or home charging point? I noticed in Bjørn's video that CCS charging drops to 43 kW at 20% capacity, then drops again three or four more times.

Re: Type 2 vs CCS charging speeds

Posted: Wed Jan 13, 2021 5:34 pm
by londiniumperson
Thundarian wrote:
Wed Jan 13, 2021 10:53 am
Is the charging speed consistent when using a three pin plug or home charging point? I noticed in Bjørn's video that CCS charging drops to 43 kW at 20% capacity, then drops again three or four more times.
Make your deductions from my home EV charging data for overnight of (Watts on y axis, time on X axis):
11/12 Jan starting at 32%, finishing at 88%:

IMG_20210113_134757.jpg

11-12 Jan
12/13 Jan starting at 21%, finishing at 84%:

IMG_20210113_133831.jpg

12-13 Jan

Re: Type 2 vs CCS charging speeds

Posted: Thu Jan 14, 2021 10:59 am
by Thundarian
Yikes, so it's not even constant, let alone consistent. ~60% over 12 hours is quite scary.

Re: Type 2 vs CCS charging speeds

Posted: Thu Jan 14, 2021 1:16 pm
by londiniumperson
The charges of approx 60% are taking around 4 hours, the graph is just showing a 12hr window.

Re: Type 2 vs CCS charging speeds

Posted: Thu Jan 28, 2021 6:54 am
by edoardo
I'm in Italy, as an electrical supply I have three-phase 6kW therefore 16A total.
Should I buy the wallbox, is it better three-phase or single-phase? If I understand correctly, taking the three-phase then I would recharge only at about 5A, while if I take the single-phase wallbox I can take 16A on one phase (unbalancing the phases).
What do you recommend?

Re: Type 2 vs CCS charging speeds

Posted: Thu Jan 28, 2021 8:36 am
by HausO
@londiniumperson: Is your wallbox maybe controlled by the power grid or any other power management. In the first graph the maximum load is about 4,6kW. In Germany this is the limit for asymmetric load in the power grid. In graph #2 there is the Limit from the Honda e 7,4kW, this 4,6kW limit and a unknown limit with about 1,5kW. I charge our Honda e constantly with 2kW at a 16A socket with the original Honda charger. My graph ist almost a flat line without gaps.

Re: Type 2 vs CCS charging speeds

Posted: Thu Jan 28, 2021 8:40 am
by HausO
@edoardo: The voltages in Italy seems to the same like in Germany.

230V Single phase AC or 400V three-phase AC.

If you have three-phase 400V with 3 fuses each with 16A the maximum load is 3 x 230V x 16A = 11040 VA about 11kW.

The Honda e can only use one phase. With a three-phase wallbox and 3 16A-fuses the maximum charging power for the Honda e is 230V x 16 = 3680VA about 3,7 kW. The onboard charger of the Honda is limited to 6,6kW (offical statement from Honda), but I also read postings that charging with 32A is possible (230V x 32A = 7360 VA about 7,4kW).

A 16A single phase wallbox would be about 80% faster than the original Honda e charger (the brick).

I do not unterstand your 1st sentence "as an electrical supply I have three-phase 6kW therefore 16A total."

6kW symetrical load with 400V three-phase would be about 8,7A (calculation 3 x 230V x 8,7A) for each phase. 16A total = 3 fuses with about 5,3A each? The combination of current and power is not logical for me.

Re: Type 2 vs CCS charging speeds

Posted: Thu Jan 28, 2021 10:30 am
by edoardo
@HausO: The electrical meter in my house is 400V three-phase AC 6,6kW. I suppose with about 16A overall.

Re: Type 2 vs CCS charging speeds

Posted: Thu Jan 28, 2021 1:01 pm
by HausO
3 x 220V x 10A = 6,6kW. 220V/380V AC3 was until 1987 the standard voltage in Germany. If your meter is limited to 10A, you can also use the Honda charger (the brick). I use this one. Max. Power 2,04kW in my installation (less than 9A). But my socket for charging is directly connect to the fuse board and the cable length is only 7m.

Please ask a local electrican for the max. current you can get from your installation. The Honda can only charge with 230V (1 phase) with 6A up to 32A. I think the limiting factor will be your installation. Up to 10A I would use a dedicated socket which is directly connected to the fuse board. >10A I would use a wallbox.

Re: Type 2 vs CCS charging speeds

Posted: Thu Jan 28, 2021 5:40 pm
by londiniumperson
HausO wrote:
Thu Jan 28, 2021 8:36 am
@londiniumperson: Is your wallbox maybe controlled by the power grid or any other power management. In the first graph the maximum load is about 4,6kW. In Germany this is the limit for asymmetric load in the power grid. In graph #2 there is the Limit from the Honda e 7,4kW, this 4,6kW limit and a unknown limit with about 1,5kW. I charge our Honda e constantly with 2kW at a 16A socket with the original Honda charger. My graph ist almost a flat line without gaps.
I was on a 'time of use' tariff (Octopus Agile) at that time where the price is different for every 30 minutes and each day the prices change depending on the wholesale cost of electricity. My charger is linked to this tariff and selects the cheapest 30 minute periods.
I've recently moved to a dual price tariff where 4 hrs/day are 5p so I'll post an another image later of the charging cycle using this tariff.