I bought a jumper cable because it was cheaper than buying a 25ft cable and making it yourself. The cable I bought was defective. I almost didn't get the voltage from my panels to the combiner. It came, I replaced the broken wire with this one and my meter immediately read current. The cables were quite flexible and allowed the cable to bend quite tightly with no issues. Tests carried out from the panels to the switch. All tests were great! would recommend these connecting cables.