I have a 90amp 110 flux core welder and I need a generator to power it so I can run the welder in a shop. I am replacing some floor pans in my car. The welder will only be ran for a few seconds at a time for spot welding so I won’t have a constant pull on the generator but for a couple of seconds on each spot weld.
I read that to get the correct wattage to power the welder you muliply the AMPS x VOLTS. In this case it is 20 amps x 120v (wasn’t sure if it was 110 or 120). Nevertheless it comes out to 2400 watts. I can’t run the generator at 100% capacity though so I need one a little larger than that.
At what percentage would it be safe to run the generator at constant? For instance, should the 2400 watts be 50%, 75% of the generators rated or max output?
I found a really good deal on a 3500 watt generator and the welder would be pulling about 60% each time I spot weld with it so there would be some spare power. Is this safe enough for this job?
My problem is I can’t really afford to haul a larger generator around very much and it would rarely see any use except for when the power went out for more than a few hours which has only happened once here in the last several years and even then we don’t have much around the house to power except a few lights, fans, aquarium, and at the most a single refrigerator which would be ran by itself for a short time at night to keep food frozen.
Thoughts?
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