That will never happen. At least, Antimatter generation, coming from Solar Satellite-power plant. (because it would be "easy" to transport).
Antimatter is a super efficient Battery, since 99% of it gets converted into Harnasable Energy.
I was talking about the Theoretical Mining of large Clusters of Antimatter using electromagnets. We found tiny little Traces of it in space, and its Possible that there are entire planets made of the stuff since the universe is so freaking big.