The 10th largest solar manufacturer in China (and there are a bunch of them).  25 year warranty, which administrated by a third party, so even if they go out of business (which has happened to a lot of solar companies in the last few years), it should be possible to get service.  Sopray has a warehouse and offices in Southern California.  The distribution is more direct than most of the manufacturers from China, and so the prices are lower than most.  Selection is many times limited, as they sometimes sell out fast.  We try to stock sizes from 5 to 140 watts, but call to see what is currently available.  Company web site:   http://sopraysolar.com/english/products.asp?type=17