No load power, is defined as the output is not connected to a load. On industrial Power supplies this only applies to the arrival inspection at the customer. Polyamp specify the no load power in the datasheet. If you need a specific value - please contact Polyamp.

Stand-by power is defined that the Power supply is connected to the load, which has runned into a non-activity mode. The stand-by power can only be measured with the system connected.