i have taken the exam myself and flunk it by just one point. The problem was that I never had enough time to prepare and that the course i took was an abbreviated one instead of a year to do it the course was condensed to 3 months. Being my first time for this type of technology, i was likely to fail. The exam is not that hard. all you have to do it to study and understand. Take it slow. After a year of being a junior PV designer, i'll take it again. I know I have some sample test from my last course. I'll look for it and if i find it, i'll scan it as PDF and post it here.