1. What is LiFePO4 Battery Run Time?

The run time of a LiFePO4 (Lithium Iron Phosphate) battery indicates how long the battery can power a specific load before needing recharge. It's a crucial parameter for system design and energy planning.

2. How Does the Calculator Work?

The calculator uses the run time formula:

Where:

• \( \text{LiFePO4 Ah} \) — Battery capacity in amp-hours
• \( 12.8 \text{ V} \) — Nominal voltage of LiFePO4 battery
• \( \text{Load W} \) — Power consumption of the load in watts

Explanation: The formula converts amp-hours to watt-hours (by multiplying by voltage) then divides by load power to get runtime in hours.

3. Importance of Run Time Calculation

Details: Accurate run time estimation is essential for designing reliable power systems, sizing batteries appropriately, and ensuring uninterrupted operation of critical loads.

4. Using the Calculator

Tips: Enter battery capacity in amp-hours (Ah) and load power in watts (W). Both values must be positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: Why use 12.8V for LiFePO4 batteries?
A: 12.8V is the nominal voltage of a 4-cell LiFePO4 battery (3.2V per cell), which is the standard configuration for 12V systems.

Q2: Does this account for battery efficiency?
A: This provides theoretical runtime. Actual runtime may be slightly less due to conversion losses, temperature effects, and battery age.

Q3: What's a typical LiFePO4 battery capacity?
A: Common capacities range from 10Ah to 300Ah for 12V systems, with larger capacities available for industrial applications.

Q4: Can I use this for battery banks?
A: Yes, use the total Ah capacity of your parallel-connected battery bank (voltage stays the same in parallel configurations).

Q5: How does depth of discharge affect runtime?
A: LiFePO4 batteries typically allow 80-100% depth of discharge, but shallower discharge cycles will extend overall battery lifespan.