If you’re thinking “what size of a generator do I need?” what you really want to know is how much generator power or total wattage you need. To determine the best generators for home use. Add all your wattage numbers together. This will give you a rough wattage usage. For example, you might need something as small as a 2000-watt inverter generator or a couple of 5000-watt generators.
Converting watts to amps can be done using the power formula, which states that I = P ÷ E, where P is power measured in watts, I is current measured in amps, and E is voltage measured in volts. Therefore the current I in amps is equal to the power P in watts divided by the voltage V in volts.
Amps = Watts ÷ Voltage
1 Amps = 1 kVA