Including a 15 year old he started seeing when she was 13, who he left when she turned 21.
Some more detail: That's Maïwenn, born 17. April 1976. They married at the end of 1992, when she was 16 and a half, and in January 1993 at 16 and 9 months of age she gave birth to their daughter Shanna Besson. They then divorced in 1997, apparently because Luc Besson left her for Milla Jovovich who was the lead actress of his film The Fifth Element.
Various articles claim that they met when she was 12 and started dating when she was 15, but none cite the source for their original meeting time or beginning of the relationship, neither do the French or German Wikipedia articles. The English one links to this paywalled article so I can't verify.
Can I ask where you saw the claim that they started seeing each other when she was 13?
The real issue isn't the overproduction per se, but that we (globally speaking) don't have enough cheap scalable responsive distributed storage. I'm writing this from a privileged position since Switzerland has loads of dams and can pump water during such peaks. But it's clear that's not the solution everywhere. I hope a good cheap mass producible battery tech with less rare earth metal requirements comes along soon.