TUV Certified 10 mm Twin Core Cable DC 1800V Strong Flexibility Long Service Life TUV certified twin core Solar Cable 10mm2 Australian Standard PV1-F DC 1800 2 PfG 1169/08.2007 covers the single core flexible cables (wires) used in DC sides of photovoltaic system which max. permissible DC voltage is 1.8kV(line to line, non ground system). The product is applicable to the environment which safety degree is under Class II,and it can be parallel used.