For safety reasons. its recommended to use a Voltage Converter /Transformer thats max watts is at least 50% higher than your appliance.For example, if your appliance is rated at 1500 watts, you need to buy a Transformer with a max power of at least 2500 watts or greater. Some appliances, such as heating appliances Refrigerator, Air Conditioner and Coffee Maker, require 2-4 times more watts at start up than the printed rated wattage.
*Appliances with motors may requine from 3 to 7 times the listed wattage when stating. The startup load of the appliance or tool determines whether a transformer has the capabity to power it.