Warranty is 1% of module revenue and put into cogs. I'm less certain about insurance cost. Any ideas?
They actually put it in selling expenses (page F-20 from 2011 AR Yingli):
"Warranty expense is recorded as selling expense."
http://ir.yinglisolar.com/phoenix.zhtml?…l-reportsannual
At least Yingli and Trina do, and I think so do most if not all of the others as well. In 2011 Yingli incurred $24,M in warranty expense on a volume of 1604 MW (i.e. 1.5 ct/W). But you are right, it is 1% of revenue.