: Check manufacturer labels or manuals for each item. Formula :
: Total Running Watts + Highest Single Starting Watts = Minimum Generator Size .
: Appliances with motors (AC, fridges) often need up to 3x their running power to start.
: It is recommended to add a 20% buffer to avoid overloading and ensure the generator doesn't constantly run at 100% capacity. 2. Common Appliance Power Chart
: Identify what must stay on (e.g., fridge, lights, sump pump).
To determine the right generator size, you must calculate your total power load by adding the of all essential appliances plus the highest starting (surge) watts among them . 1. Step-by-Step Calculation