I'm very much looking forward to regular updates of this journey around Australia, without doubt the power supply is in place, without doubt your 90D has the best combination of options for good range, and having the Octopus will be a cut downtime when only 15 amp is available.
Climate wise you've picked the best time of year to travel across the top end, although you may be squeezed in at campsites by Southern Grey Nomads chasing the Sun.
There's going to be times when you walk into a location and ask for 3 phase power to charge your electric car, they'll give you the look like you've just landed from outer space or worse still escaped from the local institution, there's going to be times when your sitting in a roadhouse having a coffee 500 miles from nowhere and some guy walks in and announces " there's a bloody Tesla electric car parked outside, I never thought I'd see the day" and everyone looks at each other saying "what's a Tesla?"
There's going to be times when you meet a kid who's an absolute Tesla junkie, and its now the best day of his life, and his parents are ever grateful to you because even though they have no idea what a Tesla is "that damn kid of ours hasnt smiled for the past two weeks of this holiday"
There also may be the time when you come across that one person, the one who thinks electric cars are evil, he read it online at RWNJ daily, he knows what the car is and it shouldn't be there, "this is a city car boy, it doesn't belong here", no need to say a word, just enjoy the moment.