1. What is Battery Capacity?

Battery capacity is a measure of the charge stored in a battery, typically measured in ampere-hours (Ah). It indicates how much energy a battery can deliver at a specific voltage over time.

2. How Does the Calculator Work?

The calculator uses the battery capacity formula:

Where:

• \( \text{Energy Requirement} \) — Total energy needed in watt-hours (Wh)
• \( \text{Battery Voltage} \) — Nominal voltage of the battery (V)

Explanation: The formula converts energy requirement (in watt-hours) to battery capacity (in ampere-hours) by dividing by the battery voltage.

3. Importance of Battery Capacity Calculation

Details: Knowing battery capacity is essential for designing power systems, estimating runtime, and ensuring your battery can meet your energy needs.

4. Using the Calculator

Tips: Enter your total energy requirement in watt-hours and the battery's nominal voltage in volts. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between Wh and Ah?
A: Watt-hours (Wh) measure energy, while ampere-hours (Ah) measure charge. They're related by voltage (Wh = Ah × V).

Q2: How do I determine my energy requirement?
A: Sum the power consumption (in watts) of all devices multiplied by their runtime (in hours).

Q3: What is nominal voltage?
A: The average voltage a battery maintains during discharge (e.g., 12V for lead-acid, 3.7V for lithium-ion).

Q4: Should I add a safety margin?
A: Yes, it's recommended to add 20-30% to account for inefficiencies and battery aging.

Q5: Does temperature affect capacity?
A: Yes, battery capacity typically decreases in cold temperatures.