So an interesting point. During the RMA process with REC, REC told me a bit about the panels history and who they originally sold the panels to. Also, these panels were made 5 ish years ago. They likely spent a ton of time sitting in storage until their owner off loaded them to signature solar. I really like that signature solar sells these kinds of deals, I praise signature solar for it. But it does have risks as the panels may have been mishandled in their lifetime long after they left the manufacturing plant. I personally really like REC panels and the evidences I saw made me think the damage happened at some point during transport or storage.That right there is reason enough to not do business with REC. I am glad signature resolved this for you, but for a manufacturer to step out from under liability for damage they likely caused at the plant is truly a nightmare.
Also, I have successfully reported damage through an rma on manufacturing damage with some other panels a while back. And I've inspected hundreds of panels. I truly don't think REC contributed to this case of damage. But I could be wrong, any industry can be cut throat and kinda corrupt sometimes.