It looks like I will be trying to find a happy medium then.
I think to cancel out that apparent power with the welder going at full power would take 480uf but all that unused reactance would be a waste. I don't plan on running full power very often.
I ran my machine some today and I think I will be keeping it between 120 and 180 amps for now 145amps seems like the happy place.
I could always run the capacitors on switches to cut way down on unused reactance.
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