> All in one planetary gearset. In the first version. In later versions they added a second separate gear set. Then even later they merged the two gear sets

> All in one planetary gearset. In the first version. In later versions they added a second separate gear set. Then even later they merged the two gear sets back into one but with two separate planetary arrangements. I'm not a particular fan of EVs in general, but I do very much like the Prius and the careful engineering that went into this drive train. This video[0] does a great job of explaining the overall system in the context of an operating vehicle. [0]: https://www.youtube.com/watch?v=PIYNAroYEk0 https://www.youtube.com/watch?v=PIYNAroYEk0