If the value is staying with local workers (social ownership) instead of being captured by some multinational, that's closer to a textbook definition of socialism than capitalism. How's that double-speak?

The solar panels are produced by outside of the country with companies applying massive economies of scale. I don't know what about this is socialist.

I guess it is vaguely leftist in the sense that poor 3rd worlders are benefiting. But whether a system is capitalist or not does not hinge on this sort of grievance-based thinking.