Quote:
Originally Posted by Piotrsko
Well technically, in the stepup transformer, the smaller ratio is considered to be more efficient because of saturation so 120 v might use less watts, wasn't adding the 12 to 120 stepup.
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I forgot the math to calculate the Watts output in proportion to Amperes, Ohms and Volts, but sometimes transformers are pointed out to be quite inefficient overall, even though under some circumstances they may actually fare better.