To continue my OT comment about penny pinching, I discovered free 9kW chargers 15 miles away, so I've started plugging in there while I run for an hour or so. Then I take a lazy cool-down walk, and then do the web-surfing I would normally have done when I got home. In 2hrs, I end up banking about 10% more charge than I used roundtrip.
Regarding 12hr shifts, I'd think getting access to a charger at some point during that timeframe would be very likely. There's no worry charging while hot since your car has active thermal management. I'd have no concerns about charging to 100% assuming you're not leaving it fully charged for days.
I'd have killed for a 3kW charger at my work when I had the Prius plug-in. It would have allowed me to complete trips in EV only mode in the winter. Instead, I'd have the engine fire up for 1 mile, not get up to operating temp, and then shutoff when I parked in the garage.
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