Karma you understand me at what I'm trying to get at lol we all understand how to figure out the watts but in order to be accurate you must need to know how many amps the whole entire unit is pulling regardles and that's what I'm trying to get
OK I'm not a scientist nor a electrician, I can't figure out how many amps a typical 150 watt system is, because in order to figure out real wits you need to know amps x volts right?