[cricketo]

I think the caveat with that video is that there is already a boost converter in the Prius inverter. Here is a write up that's tangentially related :

https://nicjam.es/projects/how-to-turn-on-the-gen2-prius-boost-converter-module/

 

[brian_]

... The standard currently is to have a costly EVSE that interfaces an on-board ac charger in the car with the AC power line, usually in a garage. And, the standard includes as an option a quick charge port that connects directly to the battery to allow DC charging directly from an external DC charger at a quick charge station.
It's time to rethink these processes. Why carry an on-board ac charger around as an extra cost and extra weight in the car when you have external DC chargers available? Why not remove the AC Charger and install it to the AC line in the garage so it will charge directly to the quick charge port?

That all makes sense... except that the majority of public charging points are still only AC, and having an onboard charger allows charging from them and from any common outlet, where there is no charging station at all.

A more functional configuration would be to mount a decently high-power DC charger in the garage (probably higher power than a typical current onboard charger), but keep a small onboard charger for use when needed.

 

[gregski]

Let's think about this. The standard currently is to have a costly EVSE that interfaces an on-board ac charger in the car with the AC power line, usually in a garage. And, the standard includes as an option a quick charge port that connects directly to the battery to allow DC charging directly from an external DC charger at a quick charge station.
It's time to rethink these processes. Why carry an on-board ac charger around as an extra cost and extra weight in the car when you have external DC chargers available? Why not remove the AC Charger and install it to the AC line in the garage so it will charge directly to the quick charge port?
It's time to shift gears and think making the current processes more efficient,less convoluted and less costly, i.e., removing the ac charger to the garage, dumping the lead acid battery for a LFP replacement and requiring all U.S. EVs to standardize on the CCS standard instead of the Japanese or Teslarese standard.

I hear you it's like ditching the spare tire on modern cars, or not having a starter on race cars, of course DC to DC charging seams like the way to go since there won't be any conversion loss from AC to DC