XF alarm goes off when sun heats up car

Hello all,
I’ve got a 2010 XF with the Supercharged V8. It’s parked outside and everyday when the sun heats it up, the alarm goes off. Normally I would garage it, but times are tough. Additionally, it’s a black car in the sun, in Florida in August. So yeah, I’m surprised it hasn’t self combusted too. Anyone know what would cause external heat to set off the alarm? My neighbors thank you in advance!