Most site plans feed EV chargers from the nearest building. It looks tidy on the drawing. In the field it means a bigger service, bigger feeders, more panel space, and a conduit run from the electrical room out across the lot.
Curbstar pedestals take service straight from the utility transformer through their own meter and main. On many multifamily and commercial sites the transformer already sits near the parking, so the run is short and the building's electrical design doesn't change.

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