PV yield test projects are one of the most important ways to evaluate the performance of PV modules and PV systems, and thus have attracted extensive attention from the industry in recent years. JA Solar and TÜV Rheinland recently reported the results of a one-year energy yield test at the national outdoor yield test base for PV products in Qionghai, Hainan, China. The test aimed to study and verify the power generation performance of different types of modules, especially n-type modules and p-type modules.