[wyager]

This doesn’t make any sense. Power transmission with DC still requires high voltage for any reasonable efficiency. Then you have to convert it back down to a residential voltage (still probably >100V for conductor material efficiency) and then devices have to convert that down to low voltage. So you’re not actually saving any conversion steps. On top of that, you have to use DC-DC power electronics, which are much more expensive than transformers etc. at high power levels.

There is an argument for using DC over AC but avoiding conversion losses is not a compelling part of it.

[bob1029]

> On top of that, you have to use DC-DC power electronics, which are much more expensive than transformers etc. at high power levels.

Is this actually true though? I just bought a reel of 30 high power mosfets from digikey for ~$450. Each of these bad boys can rock ~1kW continuous switched output/input. Magnetics for the HV boost section of a 30KW DC-DC converter circuit are a mild additional cost.

Compare this to how much money you would have to spend for a more traditional copper & iron monstrosity of similar rating (well over $1000).

Weight is also a huge factor when you start talking about megawatts.