I got mine from a recycler, he said they failed inspection after installation for scuffs and scratches. Mine produce very close to spec. I have read that most p

I got mine from a recycler, he said they failed inspection after installation for scuffs and scratches. Mine produce very close to spec. I have read that most panels degrade at about 1% per year, the ones I got were 3 years old. I checked them all to see that the open voltage was close to the specs when I got them, worked out great.