Is there a source for the claim that solar provides 7% of the world's power? I'm trying to track down the source of this figure. I see that the global "photovoltaic (PV) capacity" is at 6.6% (according to a trade organization that represents manufacturers of solar panels). I don't see a definition for "PV capacity", but I assume it means the total theoretical output of all installed solar panels, even if the output is much lower (due to panels being sub-optimally located, aligned, or having degraded over time).
I'd love to be proven wrong, but I'm just not buying the 7% figure as the evidence stands.