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11w soldering gun connected to a 110/220 inverter what would be the total electric use.? Answered

11w soldering gun connected to a 110/220 inverter that is a transformerless kind for inductive loads, 3x4 inches,rated for2000w, I think there is only a single component in it,  what would be the total electric use.? after connecting this 110v 11w soldering gun to 220v ?
thanks you in advance, my opinion inverter eats up some watt as well.
Al Boz


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Jack A Lopez
Jack A Lopez

7 years ago

If your toolkit includes a wattmeter, then you can just measure how much power is being drawn from the mains.

In my home country, the Kill-A-Watt (r) brand is a popular, and relatively inexpensive, wattmeter. I think I bought mine from this place,


As you can see, from the pictures in the page I linked to, that one has those NEMA shaped connectors, as used by the 110 V AC mains in the former US. I am guessing that a inexpensive meter similar to that Kill-A-Watt (r), exists, only with the appropriate shaped connectors for the mains power in your home country, wherever that is.

I'm just saying those wattmeter gizmos are handy, and I will leave it up to you to seek out such a device compatible with your mains power connectors.


7 years ago

The converter will bring down the 220V to 110V. So the soldering gun will 'see' 100V and still consume 11W.  (If you connected it directly to 220V, it would probably consume more like 44W and burn out in seconds/minutes).

The total electric use will be the same on both sides of the converter. While the gun uses 11W (110V @ 0.1A) the transformer converts that to .... wait for it ..... 11W! (220V @ 0.05A)

Well, as you might have guessed - that is not entirely true. Nothing in the world is perfect / lossless. There will be some loss in the converter. Expect anything from 5% to 100% of the used power (the latter only, if you don't use the full capacity of the converter). So, worst, worst, worst case, expect the converter to draw something around 22W. (Okay, that is all just educated guesses and rule-of-thumb) But anyway, if you really have a 2000W converter and a 11W load... you will have a safety factor 180!

So: Go for it! If you are really worried, switch the gun on for some minutes and hold a hand on top of the converter. It should not get warm at all. if it gets warm but not hot ... there are a lot of losses but not too much. If it gets hot ... you have a really crappy converter.

Nevertheless, I'd recommend to buy a good, temperature controlled soldering station. For anything but Tifanny glass works, soldering guns are just a pain in the ..er.. back side.