I see DC used in electric cars, general automotive and RVs.
I will say 12v is not very useful, except maybe for LED lighting. It has high losses to travel any distance. To power anything of significance requires higher voltage (or enormous cables).
I do agree that it would be really good to use DC, but I kind of wonder what the reality of efficient and useful DC would be like.
12v DC is not even useful for LEDs as it requires current limiting resistors - hence power wasted to heat. The proper (efficient) way to drive LEDs is via constant current source.
I meant DC as in 230-330V DC for home/office use. I meant generally replace AC (high voltage) lines with DC ones.
I will say 12v is not very useful, except maybe for LED lighting. It has high losses to travel any distance. To power anything of significance requires higher voltage (or enormous cables).
I do agree that it would be really good to use DC, but I kind of wonder what the reality of efficient and useful DC would be like.