Quote:
Originally Posted by Matyko
Warranty at most solar companies mean they guarantee 80% efficiency after 20 years of usage. This is not totally obsolete! 
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I'm a fan of solar, but right now so many companies go out of business after a few years making a 20 year warranty is useless. Almost all panels come from China so try tracking down a Chinese company in 20 years..
The best option is to order direct from a Chinese manufacturer if you are ordering more than a few panels. I did this with my last set up and saved a ton of money. Got the panels with in 2 weeks as well. But far as warranty, unless the panel is broken when you get it, it's unlikely you will get much help past a year or so..
With that said, I've never had a bad panel or had one go bad.