How to Figure Power Usage on a Generator

Electrical generators provide a means for producing power in remote areas or during times when electrical service is unavailable. Unlike the national power grid, the load placed on the generator is important to ensure that the generator is not overloaded or overworked. Furthermore, estimating the currently imposed electrical load on the generator allows a user to ascertain whether more power is available for additional consumption.

Instructions

1. Ascertain the amperage ratings of each appliance being used by the generator. This information is located in the manufacturer's documentation or may be displayed on the appliance itself.

2. Add the amperages of all the appliances together.

3. Multiply the sum of the amperages by the operating voltage of the generator. This is most commonly 120 volts. This equation provides the wattage currently being drawn from the generator.

References

• University of Missouri Extension: Sizing and Safety Tips for Standby Power Generators
• Diesel Service and Supply: Sizing a Generator - How to Determine What Size You Need