My rough understanding is that AC conductors (energized, i.e. having a significant potential difference than ground) come into the charging stations, go through

My rough understanding is that AC conductors (energized, i.e. having a significant potential difference than ground) come into the charging stations, go through an inverter, after which point the DC conductors may or may not be energized. I don't think copper thieves would be able to tell accurately which wires are which. Mind you, I'm not an electrician or electrical engineer; I just work on my home wiring sometimes.