I used $0.25 / kWh assuming they were in California. I didn’t dig in to figure out exactly where this “test” was done.
And I concur on plug in hybrid, for my use case. Pure EV only works for a 2nd vehicle that can live with the range limitations.
Some of the public superchargers are HIGH DOLLAR, and they degrade your battery.
Other than that, they’re a good service ;-)