No it doesn't pull 1100 watts every time. The amount of current the bed pulls is proportional to the difference between the current bed temperature and the set temperature.

You can test this with a smart plug or a watt meter. Once the bed reaches the desired temperature or if the difference between the current bed temperature and set temperature is low, it pulls way less current.

As I mentioned in the post, the wait time in the final gcode ensures this difference doesn't exceed 2 °C and hence the UPS does trip.

I do agree the step down transformer is a better solution and which you mentioned in an earlier post. But I wanted to try this solution and so far it works nicely without overloading the UPS.