Historic Eclipse will test US solar-power grid like … clouds do

There was a lot of buzz in the media about how the solar grid would go down because of the eclipse. 

Historic Eclipse Will Test America’s Grid as Solar Waxes, Wanes

Grid operators, utilities and electricity generators are bracing for more than 12,000 megawatts of solar power to start falling offline as the moon blocks out the sun across a 70-mile-wide (113-kilometer) corridor stretching from Oregon to South Carolina.

This is the first major test of the power grid since America started bringing large amounts of intermittent solar and wind resources onto the system. It comes just as the grid is undergoing an unprecedented transformation whereby flexible resources such as battery storage will complement growing supplies of solar and wind.

You know, because these solar panels have never seen darkness before: whether from night, clouds, etc. 

And the path of totality is extremely narrow (I know; I drove to get there). And the shadow moves at 600+ mph, with totality lasting a max of 2 minutes. 

And this is going to cause the solar power grid to fail? 

I’m trying to figure out where these scare tactics are coming from, and who is juicing them along.