1. What is Generator Wattage Calculation?

Definition: This calculator determines the required generator size in watts based on the total electrical load and a safety factor.

Purpose: It helps ensure you select a generator with sufficient capacity to handle your electrical needs with a safety margin.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_w \) — Required generator wattage (watts)
• \( \sum P_{load} \) — Total connected load (watts)
• \( SF \) — Safety factor (typically 1.2-1.5)

Explanation: The total load is multiplied by a safety factor to account for startup surges and future expansion.

3. Importance of Proper Generator Sizing

Details: Correct sizing prevents overload conditions, ensures reliable operation, and improves generator longevity.

4. Using the Calculator

Tips: Enter the total connected load in watts and safety factor (default 1.2). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a safety factor in generator sizing?
A: A multiplier (typically 1.2-1.5) that provides capacity for startup surges and future expansion.

Q2: How do I determine my total load?
A: Sum the wattage of all devices that might run simultaneously, or use our Load Calculator tool.

Q3: When should I use a higher safety factor?
A: For motor-heavy loads (1.5), critical applications, or when expecting future expansion.

Q4: Does this account for three-phase power?
A: No, this calculates total watts. For three-phase, divide by 1.732 for per-phase current.

Q5: Should I round up to standard generator sizes?
A: Yes, always round up to the next available generator size after calculation.