Quite right Ian, I was referring to the actual hit on the battery by using the fryer for about 20 minutes, to cook a basket of chips for example.Something not quite right there.
Your 1300W load will draw something like 120A not 38A.
If you run it for 20 minutes it will consume approximately 40Ah.
Perhaps that’s what you meant; it depletes your battery capacity by 38Ah.
Ian
BTW, I was tempted by the Aldi middle aisle last November and purchased their 1.9L Air Fryer for €19.99, rated at 900W, to save on battery, but it is quite small compared to the 1300w 3.2L unit and it's marginal if it is suitable for two people.