That's only the inter-grid exchange capability, over AC1 <-> DC <-> AC2 transformation, not the total one If you read the article, the US has about the same in

That's only the inter-grid exchange capability, over AC1 <-> DC <-> AC2 transformation, not the total one If you read the article, the US has about the same inter-grid exchange capability for the west and east coast grids. Japan has alone over 50 GW of solarpower, and that's only a small share of their energy mix. They produced 1009 TWh in 2015, that'd be an average of 117.95 GW, and usage is seldom average, but with daily peaks. I'd take an educated guess and say their nets can handle multiple hundreds of GW to up to a TW just fine..