TLDR: "You get what you pay for!"
This "500W Solar Panel" was advertised online (Shopee) for 1098 Php (~19 USD).
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You don't stop buying cheap things that claim to be the best haha, I think they already marked your IP address and they send you those ads because they know you will buy it 😂, (just kidding). At least you have your panels working and you were able to recover the one that was damaged, which was what you paid for 😉 haha. Greetings brother.