Gggrrr. As a former wholesaler this infuriates me!
Years ago, way back in the noughties, I used to be the national sales manager for Australia's largest wholesaler. One of the things I learned very quickly was panel warranties usually came from bad transportation and storage.
Case in point, the panels in the photo below. One of the things you often pay for in premium gear is premium storage. Many of these panels won't work properly after being staked 3 high. Panels are strong yes, but how would you go with several tons on top of you for months on end?
So do you get what you pay for with premium gear, well, sometimes it's the little things like this that make all the difference to your system!