Makes me wonder if they could have made it smaller why they didn't. Maybe the Frame is used on other models and doesn't have the "fist" space?
Heat - thermal management and power delivery are critical factors in power circuit designs. Note the bus size/thickness comments in the video
I get that, but I could argue that even with less space and a smaller housing that it could be possible to manage thermal temps with active or passive methods. To me it seems like a cost decision or a manufacturing one, if some parts are common to the Toyota line. It would have been nice to have the 12V battery up front, every free inch matters. Cheers