A friend in Germany sent me this article about difficulty of including charging stations in the construction of a luxury apartment building, resulting in the abandonment of that component:
Die Leiden eines Hausplaners: Hilfe, E-Auto-Ladestation!
Can someone dissect this and help with the analysis WRT German electrical grid and standards?
My minimalist German skills, along with some selective copy/paste into translation services, gave me the result that they had planned 32a charging stations and the sum total was more than they afford or get approval from the city for. However, I suspect I have missed a lot.
Here is what might be the crux, if my google translation is correct:
“
Now, in a new housing development (about 100 apartments in 12 houses) the following happened. The client wants to have installed at least 20 charging stations for electric cars in the common underground car park. A corresponding charging station can supply a current of 32 A during fast charging. That is, if all charging stations were fully operational, theoretically I would have to hold 640 amperes. Of course this is not possible. The columns are interconnected and regulate each other. Thus, the load time - with multiple use - can increase to several hours, where the manufacturer of the pillars says that this is acceptable, but the builder persistently asks why that is so. He eventually sold or rented high-end apartments, and a charging time of several hours (up to 8 hours) would not be a good selling point.”
My summary translation:
- The builder considered charging time up to 8 hours to be insufficient, so he has no clue about realistic EV charging requirements.
- That “several hours up to 8” level, deemed unacceptably slow, is I think what they projected would happen when all 20 stations were charging at the same time, and hence reduced from the 32a maximum for each.
HELP??? COMMENTS??
[ED#1] changed “all 100 stations” to “all 20 stations”
[ED#2] AHA, I see that their goal was to install a small number (20%) of “common charging stations”, each of which would have a relatively “fast” charge, instead of giving each apartment a dedicated charging outlet at a more modest power level. I think the latter is a more reasonable approach, especially since you then have the option of charging each occupant for their use.
