1. What is a RV Generator Size Calculator?

Definition: This calculator estimates the appropriate generator size (in kW) needed for an RV based on the total electrical load and a safety factor.

Purpose: It helps RV owners and campers determine the right generator capacity to power all their appliances and devices.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Recommended generator size (kilowatts)
• \( \Sigma P_{load} \) — Total electrical load (watts)
• \( SF \) — Safety factor (typically 1.25)

Explanation: The total wattage is converted to kilowatts (divided by 1000) then multiplied by a safety factor to account for startup surges and future needs.

3. Importance of Proper Generator Sizing

Details: Correct generator sizing ensures reliable power supply, prevents overloads, improves fuel efficiency, and extends equipment life.

4. Using the Calculator

Tips:

• Add up the wattage of all appliances you plan to run simultaneously
• Use default safety factor of 1.25 (25% buffer) unless you have specific requirements
• For typical RVs, the result will usually be between 3–7 kW

5. Frequently Asked Questions (FAQ)

Q1: What's included in the total load calculation?
A: Include all appliances you might run simultaneously (AC, fridge, lights, electronics, etc.).

Q2: Why is the safety factor important?
A: It accounts for startup surges (especially for motors) and provides headroom for future additions.

Q3: What's a typical generator size for RVs?
A: Most RVs need 3–7 kW generators, depending on appliances. Small campers may need only 2–3 kW.

Q4: Should I round up the calculated size?
A: Yes, generators come in standard sizes (3kW, 3.5kW, 4kW, etc.) - choose the next available size above your calculation.

Q5: How do I find appliance wattages?
A: Check appliance labels or manuals. Typical values: AC (1500W), microwave (1000W), fridge (600W), LED lights (10W each).