1. What is a Generator Size Calculator for RV AC?

Definition: This calculator estimates the required generator size (in kW) to power an RV air conditioning unit based on its power consumption and a safety factor.

Purpose: It helps RV owners and campers determine the appropriate generator size needed to run their AC units efficiently.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Generator size (kilowatts)
• \( P_{AC} \) — AC power consumption (watts)
• \( SF \) — Safety factor (typically 1.25 for startup surge)

Explanation: The AC power is converted from watts to kilowatts, then multiplied by a safety factor to account for startup surge current.

3. Importance of Proper Generator Sizing

Details: Correct generator sizing ensures reliable AC operation, prevents generator overload, and extends equipment life.

4. Using the Calculator

Tips: Enter the AC power consumption in watts and safety factor (default 1.25). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why do we need a safety factor?
A: The safety factor accounts for the higher startup current (surge) required by AC units when they first turn on.

Q2: What's a typical power consumption for RV AC?
A: A 13,500 BTU RV AC typically draws about 1,500-1,800 watts running, with higher surge at startup.

Q3: When would I change the safety factor?
A: Use 1.25 for most RV AC units. Increase to 1.5 for older units or if running other appliances simultaneously.

Q4: How do I find my AC's power consumption?
A: Check the AC unit's specification plate or manual for rated watts/amps (amps × volts = watts).

Q5: Does this include other appliances?
A: No, this calculates only for the AC. Add 20-30% more capacity if running other appliances.