Feature●Solar Connector to DC5521 Connector: Y-Branch Type, Terminal 1: MC-4 Connector / MC-4 Conversion Cable, Terminal 2: DC 21.7 inches (5521 mm) Conversion Adapter, Solar Panel (40-120W, 13-18V). Large capacity portable solar generator power supply●(MC-4 to DC5.5 x 2.1 mm): Main line: 16 AWG; Double crotch: 16 AWG. Solar extension cable length 1m, moderate length, very flexible to minimize power loss of solar panel system●Solar Panel Connector Cable: Used to connect solar panels and solar generators, and compatible with all solar panel kits with MC4 connectors. Standard solar powered waterproof interface IP67, plug and play●☀【High Quality Solar Cable】High quality material ensures stable transmission. Wiring is weather resistant and designed to withstand extreme hot and cold temperatures. Moisture resistant, UV resistant, and corrosion resistant●Note: The polarity of the solar panel connector may differ from the brand. The female connector of this cable is POSITIVE, Red Line (MC4 female connector) = Positive polarity, Black Wire (male connector) = Negative polarity. Please double check the positive and negative poles of the solar panel or solar battery portable generator before purchasingDescription