[ansgri]

Valid points, though for safety I thought less about shock and more about fire: the DC arc is much more stable, thus the switches, breakers and relays have to be more robust. The rated DC voltage of magnetic relays is about 1/10 of AC.

[kkfx]

Well... I'm ready to pay 10-time the price of an AC breaker to recharge regularly DC-to-DC and since that's the very same link than stationary 400V LFP batteries being able to use the car battery as a home one when I'm at home.

Try to imaging how well you could run if you have a small battery, as an expensive UPS for the home when you are not there (ventilation, homeservers, fridge(s)/freezer(s) etc) and when you are at home, thanks to a let's say 70kWh battery you can also run your heating in winter in case of a blackout...

In the end it's the very same power circuit, why not? 300€ extras in breakers to run my heat pumps more efficiently? No issue, they'll pay back countless more.