1. What is the C&D Battery Runtime Calculator?

The C&D Battery Runtime Calculator estimates how long a C&D battery will last under a specific load. It's essential for planning power systems and ensuring adequate runtime for sale applications.

2. How Does the Calculator Work?

The calculator uses the following equation:

Where:

• \( \text{C&D Ah} \) — Battery capacity in amp-hours
• \( V \) — Battery voltage
• \( \text{Sale Load W} \) — Power consumption of the load in watts

Explanation: The equation converts battery capacity to watt-hours (Ah × V = Wh) then divides by the load to determine runtime.

3. Importance of Runtime Calculation

Details: Accurate runtime estimation is crucial for designing reliable power systems, especially in sale applications where power outages can be costly.

4. Using the Calculator

Tips: Enter the battery's amp-hour rating, voltage, and the load's power consumption in watts. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What affects battery runtime accuracy?
A: Temperature, battery age, discharge rate, and actual vs rated capacity can affect real-world runtime.

Q2: Should I derate the calculated runtime?
A: For critical applications, consider using only 80% of calculated runtime to account for variables.

Q3: How does battery type affect runtime?
A: Different battery chemistries (flooded, AGM, lithium) have different discharge characteristics.

Q4: What's the difference between Ah and Wh?
A: Amp-hours (Ah) measure charge capacity, while watt-hours (Wh) measure energy capacity (including voltage).

Q5: Can this be used for battery bank sizing?
A: Yes, work backward from desired runtime to calculate required battery capacity.