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It would be great to have 48VDC in homes, for lightning, light appliances, etc. to centralize the whole power factor control in a single big power supply instead of doing it (poorly, or not at all) at every LED bulb.
Earlier quoted context omitted.
Agreed. 48V (actually -48V) has been used across telco central offices for decades.
How exactly do you define a negative voltage unless you are using some other voltage as a reference?
I see this more often on European stuff
Why would a car need a 48V system for accessories? In general the things a car's 12V system powers have gotten less power hungry over time (LED's, heat pump) and in particular, an EV loses the highest power electrical device on the 12V bus, the starter. The typical equipment used for the entertainment and control systems are going to be much more available with 12V supplies, just because that's the industry standard.…
Also other stuff: * heated back window * heated front window * heated seats * heated steering wheel
Also the lights, even when they are LED they still draw a lot of power: * front lights, * back lights. * surrounding lights * comfort lights
That is just of few devices. Just look into all the comfort in a modern (luxury) vehicle.
It would be great to have 48VDC in homes, for lightning, light appliances, etc. to centralize the whole power factor control in a single big power supply instead of doing it (poorly, or not at all) at every LED bulb.
With EV's there's no reason to keep 12 V.
Earlier quoted context omitted.
We humans are all terrible on some level (except my mom, she was a saint), but if you have enormous power, you can help or hurt a lot of people based on your actions. Musk has a lot of power. He must be a terribly lonely person, not knowing if he can trust anyone or they just want something from him.
Nobody knows if they can trust anyone, not just rich people.
Why would a car need a 48V system for accessories? In general the things a car's 12V system powers have gotten less power hungry over time (LED's, heat pump) and in particular, an EV loses the highest power electrical device on the 12V bus, the starter. The typical equipment used for the entertainment and control systems are going to be much more available with 12V supplies, just because that's the industry standard.…
It’s not primarily about delivering more power, is it? I thought the point of higher voltage is that for a given power the wires can be smaller.
Earlier quoted context omitted.
Agreed. 48V (actually -48V) has been used across telco central offices for decades.
How exactly do you define a negative voltage unless you are using some other voltage as a reference?
48Vdc is supposedly the highest voltage that is still considered safe. ( https://electronics.stackexchange.com/questions/267789/how-s... ) It certainly sounds like a smart move on the copper savings alone.
Extra low voltage is 50v ac or 100v dv. https://en.wikipedia.org/wiki/Extra-low_voltage For some reason people assume it's 48v DC or 50v dc. But it's double that. That said, I feel significantly more scared dealing with 100v DC than I do 48 or 24v.