Some parts of the energy transmission grid are DC, but looks like it's mainly international, undersea, and long-range transmissions: https://en.wikipedia.org/wi

Some parts of the energy transmission grid are DC, but looks like it's mainly international, undersea, and long-range transmissions: https://en.wikipedia.org/wiki/High-voltage_direct_current https://en.wikipedia.org/wiki/High-voltage_direct_current