... Solar Panel, PV Solar Module 1,CE, RoHS approved 2,High efficiency 3,25 year warranty 15.7% Efficiency Polycrystalline Solar Panel, PV Poly Solar ... all-purpose solar module with 72 poly-crystalline solar cells connected in series;(2) High efficiency solar cells, delivering a module series efficiency ... diagram7. Production8. Product details 15.7% Efficiency Polycrystalline Solar Panel, PV Solar Module