Thanks for the advice mr.juantxo, still finding solutions...... need more details

Hi, I'm newbie here......can anyone help me to solve this algorithm that can applied in sketchup:

Ifa Shadow touching a SolarPanel :
Then, messagebox : Forbidden solar panel position!
Else
doing solar panels energy calculation

note : the Shadow (from sun shade) in range Januari-Desember , 7am-5pm

i'm stuck in the way shadow touch solar panel, can anyone explain?

I attached the screenshot: