Does a 1000 watt transformer/converter draw power when no power user is plugged into it?

I have a 1000 watt transformer/power converter (110/220VAC up/down) and have been told by some people that if I leave it plugged into the wall that it will continuously draw 1000 watts of power even though the, for example, TV that is plugged into it is turned off. The TV's max power rating is only 245w. They even state that if the transformer is plugged in but no item is plugged into the other side, that it is still drawing that power. I think they are wrong because this transformer is passive unit.Does a 1000 watt transformer/converter draw power when no power user is plugged into it?
They are wrong.



The converter will likely draw some tiny amount of power even if nothing is plugged into it, however the power lost is quite small.



If your TV uses 245 watts and being used, the total power used by the converter are those 245 watts plus the loss in the converter, typically 2 - 5 percent of what is passed through.



One crude measurement of power loss is quite simple. Measure the temperature of the transformer. If it gets warm it's been using some power. Hot, it's been using up more power. Room temperature, it's been using very little.

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