Original brand new A Grade Poly Solar Panel 260Wp at 16.6% Max. Efficiency! Made by top class solar panels or PV modules manufacturer in ShenZhen, China. We inspect ordered solar cells and inspect each panels, sampling to test by our engineers carefully, to make sure the warranty 20-25 years is not only a world! how could it bear terrible weather for 20 years? Will it leak after 3years? The good price is result of compromise with quality? Let us tell you in professional !