Currently, the electricity you get at home has been stepped down in voltage several times.  The power station delivers it on the order of 100,000V, which gets stepped down at a sub-station to something like 20,000V, and then stepped down by a distribution transformer to 120&#x2F;240V.<p>If the grid were DC, what would do all of that stepping down?  Is he proposing replacing all of those transformers with an army of industrial strength DC-DC converters?  Wouldn&#x27;t that eat into the efficiency gains he is proposing (I would also imagine that that gigantic active switching solutions are more expensive and less reliable than gigantic transformers).<p>My first thought at a suggested alternative was &quot;why not try increasing the frequency of the distribution AC?&quot;.  This redditor explains why that&#x27;s not ideal: <a href="https:&#x2F;&#x2F;www.reddit.com&#x2F;r&#x2F;askscience&#x2F;comments&#x2F;1u45rz&#x2F;why_dont_we_use_a_higher_frequency_in_the_ac&#x2F;ceejje6" rel="nofollow">https:&#x2F;&#x2F;www.reddit.com&#x2F;r&#x2F;askscience&#x2F;comments&#x2F;1u45rz&#x2F;why_dont...</a>