On a L1 charger on my volt I had a circuit that had a neutral ond hot wire reversed on a connection wired in my house. It would not charge on that circuit. I had to trace out a juction box where the wiring needed corrected. Worked great after that. It'd been that way for years.
I ordered on April 12th. Haven't received a build date but my dealer told me today I've been moved from a #19 to a #2 priority. He thinks I should receive a build date soon. We shall see.
Yes you are right about the 32 amp charger & a 40 amp circuit. If I was burying cables under concrete I would future proof it with more than a 40 amp circuit.
Here's the installation recommendations for the 80 amp Pro charger. I'd give this to your electrician. He should know the wiring...