Model NO.: STP 280-24/Vd, STP275-24/Vd Material: Polycrystalline Silicon Solar Cell: Polycrystalline 156*156 Mm(6 Inches) No. of Cells: 72(6*12) Dimensions: 1956*992*50 Mm(77.0*39.1*2.0 Inches) Weight: 27 Kgs(59.5 Lbs. )