Re: What does this mean for PV?
Actually the correlation between solar output and sunspot activity is well recognized and has been measured, very accurately, for many years. (About 400).
This does not prove causality, of course, but there is a relationship.
Whether it lower solar output that reduces sunspot count or the other way round, or whether a third factor affects both the other two, nobody can yet say for certain.
However the evidence suggests that it is the changes in the magnetosphere of the sun than induces sunspots, and that these changes are caused by internal factors that also reduce the output by magnetic compression.