how is wattage determined on power inverter
Choosing the Right Inverter Size. Power inverters come in many sizes, measured in watts. The amount of wattage you will require depends on the total draw of the devices youâd like to use. Many appliances and power tools have their wattage rating indicated on the product itself.attage rating can also be calculated by using this formula: Volts (120) x Amps = Watts. To determine if several appliances can be operated at the same time, simply add up their wattage ratings to see if the total falls within the specifications of the power inverter.