Depends on type of stabiliser (relay type or servomotor type), starting wattage of load(s) and power factor of load.
Relay type stabiliser is generally for non-electronic loads (such as fridge, airconditioner, lights, fans, motors, etc.), which can tolerate a momentary power break when relays inside stabiliser change transformer tappings.
Servo type stabiliser is for sensitive electronic devices (desktop computers, modems, etc.) which shut down or reset even with brief outages of say 1/4 second.
Starting wattage of loads is from 1 to 6 times the running wattage printed on the label but this high load is only for a few seconds. For example an incandescent bulb or clothes iron starting wattage is same as running wattage but airconditioner starting wattage may be 4 to 6 times running wattage.