1. What is Power Requirement Calculation?

The power requirement calculation helps determine the appropriate generator size by summing all electrical loads and applying a safety margin. This ensures the generator can handle startup surges and temporary overloads.

2. How Does the Calculator Work?

The calculator uses the power requirement formula:

Where:

• \( P_{total} \) — Total power requirement (watts)
• \( \sum P_{loads} \) — Sum of all connected loads (watts)
• 1.2 to 1.5 — Safety factor accounting for startup surges and future expansion

Explanation: The safety factor ensures the generator isn't overloaded during peak demand or when adding new equipment.

3. Importance of Proper Sizing

Details: Proper generator sizing prevents overload conditions, improves fuel efficiency, extends equipment life, and ensures reliable power during outages.

4. Using the Calculator

Tips: Enter power consumption for each load in watts. Select safety factor based on application (1.2 for residential, 1.5 for industrial). Include all significant loads for accurate results.

5. Frequently Asked Questions (FAQ)

Q1: Why use a safety factor?
A: Electrical devices often draw more power at startup (inrush current). The safety factor accounts for this temporary surge.

Q2: What's the difference between 1.2 and 1.5 factors?
A: 1.2 is typical for residential with stable loads. 1.5 is for commercial/industrial with motors or equipment that have high startup currents.

Q3: Should I include all appliances?
A: Include only essential loads that might run simultaneously. Non-essential loads can be added separately for optional use.

Q4: How does generator size relate to runtime?
A: Larger generators consume more fuel but running at 50-80% of capacity is most efficient for extended runtime.

Q5: What about three-phase vs single-phase?
A: This calculator provides total wattage. For three-phase systems, consult an electrician for proper phase balancing.