solar panels 170w with aluminum plate on the bottom

specific attributes
Cell size: 125mmx125mm
Type: IBC
Panel Efficiency: 23%
Warranty: 12years
Place of Origin: Guangdong, China
Panel Dimensions: 1570 x 540 x 3.5 mm
Brand Name: OEM
Product name: 170W High Power High Efficiency Solar Panel
Panel Dimensions: 1570x 540 x 3.5 mm
Number of Cells: 144pcs (6*24 series)
Certificate: CE ROHS
Warranty: 12Years
Junction Box: IP68, Three diodes
Weight: 2.7kg
Module Efficiency STC: 23%