1. What is a Whole House Generator Power Calculator?

Definition: This calculator estimates the total wattage needed for a whole house generator based on the sum of running watts and maximum starting watts.

Purpose: It helps homeowners and electricians properly size a generator for residential backup power needs.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Total\ Watts \) — Total generator capacity needed (watts)
• \( \sum Running\ Watts \) — Sum of all running wattages for appliances
• \( Max\ Starting\ Watts \) — Highest starting wattage among appliances

Explanation: The running watts represent continuous power needs, while starting watts account for the initial surge when appliances start.

3. Importance of Proper Generator Sizing

Details: Correct sizing ensures your generator can handle all electrical loads without overload while being cost-effective.

4. Using the Calculator

Tips:

1. Calculate the sum of running watts for all appliances you want to power simultaneously
2. Identify the appliance with the highest starting wattage
3. Enter these values to get your total generator capacity requirement

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between running and starting watts?
A: Running watts are continuous power needs; starting watts are temporary surges (3-5x running watts) when motors start.

Q2: How do I find appliance wattages?
A: Check appliance labels, manuals, or use our Appliance Wattage Calculator.

Q3: Should I size up my generator?
A: It's recommended to add 10-20% buffer to the calculated total for safety.

Q4: What if I have multiple motors starting simultaneously?
A: Add their starting watts together if they might start at the same time.

Q5: Does this include whole-house AC units?
A: Yes, include all appliances you want to power during an outage.