Feature●MC-4 TO DC 5521 Cable: Y-splitting type, one end is MC4 (male and female solar cable connector), the other end is DC 5.5mm x 2.1mm. Solar extension cable length 1m, long enough but very flexible to minimize power loss of solar panel system●Solar connector to DC 5.5 x 2.1 mm connector: Main line: 16 AWG; Double crotch: 16 AWG. The cable is thick enough to charge 150 W, so you can use it with confidence●MC4 male to female interface: Used to connect solar panel and solar generator, common to all solar panel kits with MC-4 connectors. Standard solar powered waterproof interface IP67, plug and play●High Quality Solar Cable: High-quality pure copper material ensures stable transmission. Wiring is weather resistant and designed to withstand extreme hot and cold temperatures. Moisture resistant, UV resistant, and corrosion resistant. Soft, strong cable, easy to store●Note: The polarity of the solar panel connector may differ from the brand. Please note that the female connector of this cable is POSITIVE (female-positive and male-negative). The red line is positive (+) and the black line is negative (-). Please double check the positive and negative poles of the solar panel or solar battery portable generator before purchasingDescription