inputs.text: copper clad aluminum wire - not worst wire available sure however call seller told wire not pure copper wire cca wire copper clad aluminum wireregardless using wire 4 gauge 0 gauge use making power cables attach ring terminals end solar systems put together lot cheaper buying cables ring terminals already attached plus crimp solder connections make better cables buythis wire works well not pure copper means higher power losses long wire runs use shortest possible lengths dont get significant fall power measure amps multimeter along wire battery wires keep 2 feet 4 gauge power connections like trusine inverters chargers controllers use 46 feet wire runs 0 gauge 12 plus volt systems running 30 amps far everything good however think pure copper wire isnt