My buzzbox runs most of the time between 80-110A, while the inverter welder is often used at around 60-80A for about the same job. Buzzbox also doubles as a car battery booster, using a half wave rectifier diode ( an old generic press fit one on a big block of plate as heatsink and a 40A thermal breaker) so I can do a quick battery boost if needed when flat. Not efficient, and definitely heats up more, but does work for a single start after 2 minutes.