How to identify the quality of Solar Panel

The grades of solar panels can be divided into A grade, B grade, C grade and D grade, and A grade components can be divided into A+ and A- grades. Cost difference is Very big. So what kind of solar panel is called Class A, and what kind of solar panel is called Class D?

A-grade modules: A-grade cells are the highest quality grades that can be used by modules;

B-level modules: B-level cells are slightly lower than A-level cells, and the modules can be downgraded to use complete cells;

C-level modules: C-level cells are seriously bad in appearance and missing corners. They are only suitable for cutting cells into small modules and supplying them to customers with special needs;

D-level components: D-level cells are broken pieces, which are supplied to customers with special needs or for special treatment.