Kanundrum, As with DucRider and others, thanks for sharing your technical knowledge on this topic and so many others throught the forums. On a completely unrelated topic, one thing that makes me realize how long this trip has been is the fact that today is your second anniversary on this forum (It's still May 2 here on the Left Coast). Hard to believe it's been almost two and a half years since the LA Auto Show rollout of Rivian.If you couple the information ^^ with the latest information (April 6, 2021)
High voltage laminated power distribution system with integrated fuses
A high voltage distribution system is provided with multiple fuses. The high voltage distribution system includes multiple laminated busbars that are electrically coupled to a battery and to the multiple fuses. Busbars are electrically coupled to the one or more fuses via electrical connections between the busbars and the fuses. The electrical connections can pass through other busbars without having an electrical coupling to the other busbars. An insulating layer may be used between the busbars to prevent overcurrent events. The configuration, size, and position of each busbar is selected based on the electrical requirements of components that are electrically coupled to the busbar and based on the prevention of overcurrent events.
It does confirm and sound like they can have variable voltage components based on what is available and still have a High Voltage Backbone Architecture.
Thanks again for all of your insights and knowledge on this Adventure!