1. What is the Propane Run Time Calculator?

The Propane Run Time Calculator estimates how long a UPS (Uninterruptible Power Supply) can run on propane power based on battery capacity, propane conversion efficiency, and current load.

2. How Does the Calculator Work?

The calculator uses the following equation:

Where:

• \( \text{Battery Wh} \) — Battery capacity in watt-hours
• \( \text{Propane Efficiency} \) — Efficiency of propane conversion (0-1)
• \( \text{Load} \) — Current power draw in watts

Explanation: The equation calculates how long the stored energy will last given the current load and accounting for conversion losses.

3. Importance of Run Time Calculation

Details: Accurate run time estimation is crucial for UPS system design, backup power planning, and emergency preparedness.

4. Using the Calculator

Tips: Enter battery capacity in watt-hours, propane efficiency as a decimal (e.g., 0.85 for 85%), and current load in watts. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is typical propane efficiency for UPS systems?
A: Most propane-powered UPS systems have efficiencies between 80-90% (0.8-0.9).

Q2: How do I find my battery's watt-hour rating?
A: Multiply battery voltage (V) by amp-hour (Ah) rating. For example, 12V 100Ah = 1200Wh.

Q3: Should I include inverter efficiency?
A: This calculator assumes the propane efficiency includes all conversion losses. If not, multiply result by inverter efficiency.

Q4: What affects propane efficiency?
A: Temperature, system design, load level, and propane quality can all impact efficiency.

Q5: How accurate is this calculation?
A: It provides a theoretical maximum. Real-world results may vary due to factors like temperature and battery age.