2004 PORSCHE CAYENNE Unknown Or Other Problems

I returned after being away for a few weeks, in May 2021. The solar panel had been on the inner windshield of the car following installation a few months prior. I found the car's 12V battery was almost dead (about 4 Volts), and the solar panel's plastic frame was severely melted, causing it to deform and lift away from the glass solar panel. Photos uploaded below. From reading reviews on this product on the Harbor Freight website, I now see that this is a common problem. I don't know what the cause is. Could be that the cheap plastic is just not made to withstand summer heat (although I have 2 more of these in my other cars, with no problems), and that the severe deformation of the frame somehow shorted something electical inside the panel that caused the car's 12V battery to discharge, heating the glass panel and melting...

PORSCHE LURCHES,JERKS,THUDS,INTERMITTENT POWER LOSS WHEN ACCELERATING TO PASS ANOTHER CAR. ENGINE,TRANSMISSION/TURBO SYSTEM FAULTY AND HAZARDOUS AS POWER LOSS OCCURS WHEN QUICK SPEED-UP WHEN PASSING POWER IS CRITICALLY NEEDED. THIS POWER FAILURE PROBLEM HAS OCCURRED SINCE CAR WAS BOUGHT NEW IVY ME IN 2004.