... and design 2.guaranteed +/-10% output power tolerance Characteristics of grid connected solar power system l,High and stable conversion efficienly ... Dimensions mm1650 x 990 x 50Weight Kg19.8Type of Junction Box TUV certified, IP65Cable Type, Diameter TUV certified, 4mm2, 90 cm ... Glass 3.2 mm, high transmission, low iron 20kw Polycrystalline grid connected solar power system