hmmmmmm... Very cool! How about a key-fob remote to switch backup on instead of key. Or a infrared remote control module instead of the keyswitch? the receiver would be powered by the backup's battery of course.
Why do you have to charge to 100%? you are already at 76%. Maybe charge the car in the shade, use an umbrella/pop up tent to shade the cable/car. Charge at night if you need 100% for the day.
EDITED: TYPO'd number, Sorry! #6200 received Sunday. Got an email it was shipped. Have not tried it yet. I had an A2Z which I did use because my vacation area does not have non-Tesla fast charging coverage.
I had the same problem. I talked to many different Ford people over the last 3 days and they verified my order/reservation. I have my order number and 2 case numbers. I finally got a call today from Ford Parts and they said there is a software glitch in the sending of emails and getting status...