I should have elaborated on my exponential claim. Resistive losses are indeed linear, however in the context of a maximum transmission voltage, efficiency is bo

I should have elaborated on my exponential claim. Resistive losses are indeed linear, however in the context of a maximum transmission voltage, efficiency is bounded exponentially. If you consider a voltage source of 1V, a line of 1ohm, with a load of 1ohm (0.25W), the transmission is 50% efficient. With a load of 0.5ohm (0.33W) the line is 33% efficient. with a load of 0ohm it is 0% efficient. > Also with very high voltage AC we can actually transmit quite far. We can't transmit efficiently at a quarter the circumference of the globe, which would be required for a continually directly solar powered grid.