1. What is a Home Generator Power Calculator?

Definition: This calculator determines the total wattage needed for a home generator by summing running watts and the highest starting watts among appliances.

Purpose: It helps homeowners and electricians properly size a generator to handle all essential electrical loads during a power outage.

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 (continuous power)
• \( Max\ Starting\ Watts \) — Highest starting/surge wattage among appliances

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

3. Importance of Proper Generator Sizing

Details: Correct sizing prevents generator overload, ensures reliable operation, and protects appliances from damage due to insufficient power.

4. Using the Calculator

Tips:

• Calculate running watts by adding up all appliances you'll run simultaneously
• Identify which appliance has the highest starting watts (typically AC units, refrigerators, or pumps)
• Add these two values to get your minimum generator size

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between running and starting watts?
A: Running watts are continuous power needs, while starting watts are the temporary surge (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. Typical examples:

• Refrigerator: 700W running, 2200W starting
• Central AC: 1500W running, 4500W starting
• Lights: 60-100W each (LED much less)

Q3: Should I add a safety margin?
A: Yes, add 10-20% to the calculated total to account for future needs and ensure comfortable operation.

Q4: What about fuel type (gas, propane, diesel)?
A: This calculator determines electrical needs only. Fuel type affects runtime and maintenance but not sizing.

Q5: Can I run my entire house on a generator?
A: With proper sizing, yes. However, most homeowners select essential circuits to reduce generator size and fuel consumption.