1. What is a Portable Generator Calculator?

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

Purpose: It helps homeowners determine the appropriate generator size for their power needs during outages.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Total\ Watts \) — Required generator capacity (watts)
• \( Running\ Watts \) — Continuous power needed for all running appliances
• \( Starting\ Watts \) — Highest surge power needed when starting motorized appliances

Explanation: The calculator adds the continuous power requirements to the largest starting surge requirement to determine the minimum generator size needed.

3. Importance of Proper Generator Sizing

Details: Correct sizing ensures your generator can handle all connected loads without overload while being cost-effective and fuel-efficient.

4. Using the Calculator

Tips:

1. List all appliances you want to power simultaneously
2. Sum their running wattage (continuous power needs)
3. Identify the appliance with the highest starting wattage
4. Enter these values to calculate total required generator capacity

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 temporary higher power needs when motors start (typically 2-3x running watts).

Q2: How do I find appliance wattage?
A: Check appliance labels, manuals, or use a wattage meter. Many appliances list running and starting watts.

Q3: Should I round up the calculated wattage?
A: Yes, it's recommended to add 10-20% buffer to the calculated total for safety and future needs.

Q4: What if I have multiple motorized appliances?
A: Only include the highest starting watts from one appliance, as you typically won't start all motors simultaneously.

Q5: Can this calculator be used for whole-house generators?
A: The same principle applies, but consult an electrician for whole-house systems as they involve more complex load calculations.