In the US at least I think it would be better to describe the rate at which we add solar to the grid as limited by regulatory and grid management issues. The backlog of projects waiting to be approved, in terms of capacity, is about as large as the currently installed solar capacity. One problem here is figuring out the transmission issues related to adding new capacity, so it's not just a purely regulatory issue, but the way in which grid capacity is added assumed new plants would look more like coal plants so there are regulatory aspects to it.

But of course, if you're going to just use your solar field to make hydrocarbon when the sun shines you don't have to care about any of that.