So 45 minutes into morning charge time, had a 10 minute neighborhood power failure. Charging continued after power returned. Never happened in 4 1/2 years of charging pip, but I tried to make a habit of making sure cord was disconnected during T-storms; as wife's car was hit by lightning in our driveway once. Fortunately, whole house surge protection breaker tripped and major damage was averted.
I don't think I really expected anything, but as this is a new occurrence, just add it to the quirk category. Although I went into garage to make sure it wasn't smoking or making crank calls on the telematics.
Either pip or prime, removing the charge cord would give a charge interrupted message on dash, and on email if selected on entune app setup; both of which I received on power failure. Still had electrons in the tank and could have still gone out if needed. Haven't heard about a no-start condition.
This was your first grid-down power-outage in 4 years? Pretty good there. In our town the grid normally experiences outages every month. I could see issues in a Prius it voltage spikes fed into the charge cord. I assume that just like everything else that is plugged in, you would fry all the microcircuitry. We went to solar power in 2015. Before that we could not keep a home stereo. Our power strips all fried their surge protectors. Our phone company supplied modem usually fries once a year, and their dslam card at the node [5 miles away] burns out every year. Do you have surge protectors at your meter? [lightning arrestors]
Well, when I was in Honduras, we often had several outages a day. It was very rare to go more than a week. I had line conditioners on almost everything. Otherwise, there often wasn't enough voltage to open the gas solenoid on the clothes dryer. LOL! As for PHEV power outages, I've only had one so far. That's when my wife was running the vacuum cleaner in our bedroom and we discovered that that outlet is on the same breaker as the one in the garage I use for the charger. But for the life of me, I don't remember if the car resumed charging on its own. I think it must have because I have unplugged it on purpose and it resumed.
At work, the charger system I am on is round-robin and hosts up to 4 connections. This is using the 120V outlet (sad, but true). Your "turn" consists of 30 minutes at a time, then you are off for up to 1.5 hours depending on how many other EV's are on the circuit. Never had any issues with it cycling power to the 120V charge pack but was definitely concerned when I first used it. I now walk a mile to a free L2 charger because a full 8 hours on the 120V round robin charger may only get you up to 40% which is ridiculous.