Samyo 25ft MC4 PV Solar Panel Extension Cable Wire with Solar Male and Female Connector 12AWG It is designed to connect solar panels between solar panels and extension, or to charge controller, batteries, or other panels. Compatible with PV cables with different insulation diameters: 2.5 / 4.0 / 6.0 mm2(AWG 14/12 /10). Load capability with big current and high voltage. Maximum working voltage: DC1000V; Rated Current: 30A. Lower contact resistance. Insulation material: PPO. Contact material: Copper,tin plated. With excellent aging resistance and UV endurance. Certified by TUV. Waterproof degreeIP67. Resistance of extra high & low temperature and fireproof. Flame class:UL94-V0.