Easiest way for me to think about it is:
Voltage is the input.
Wattage is the output.
Using VW you are setting the desired output, the device automatically adjusts the input.
Using VV you are setting an input, the output will vary depending on resistance (ohms).
Voltage is the input.
Wattage is the output.
Using VW you are setting the desired output, the device automatically adjusts the input.
Using VV you are setting an input, the output will vary depending on resistance (ohms).