Theoretically with solar panels you could have a round-the-clock, round-the-globe balanced network requiring no storage. It would be a network with the same capacity of panels on each meridian. Of course this is not very practical.
Not only not very practical but it would require entirely new transmission technologies: the maximum practical length of a 60Hz transmission line is only a few thousand miles. To go from the bright side to the dark side of the earth is worst-case 12,000 miles so new tech would be needed, or you'd just have to suffer 30% (or more) transmission line loss.
