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No, I agree there is a startup surge but I do not agree that it is 6X. That’s BS generator salesman talk.
It wouldn't be. Not every refrigerator has an operating power of 100 watts, that's quite low. A 25 cu ft fridge can draw 300-600w. Older fridges (pre-1993) with less insulation and less efficient compressors could draw even more.
 
Just tested starting my fridge. 742 watts peak, 121 watts running. It's a 10 year old Whirlpool.
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Almost exactly 6X for a millisecond. Would you suggest sizing a generator based on that millisecond demand?
Yes, for the peak rating. Did you read my previous posts?

Also it's not a millisecond it's more like 1 second.
 
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Almost exactly 6X for a millisecond. Would you suggest sizing a generator based on that millisecond demand?
Maybe for an inverter type as it would likely trip out. It would also depend if the motor was attached to a high inertial load
like maybe a loaded cement mixer. Until the motor get up to speed it is going to draw more juice.