How can an electronic load work at 0 Volts?
It can’t and there is just no such thing as working at 0 volts, you need voltage to produce current. Always make sure that the load will start at the low voltage and work both in the positive and negative direction. Some of our competitors loads require more voltage to start and run, then they will work to a lower voltage. Executive Engineering electronic loads will always work (sink current) at there low voltage specification.