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Conversion Formula:
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The conversion between watt-hours (Wh) and amp-hours (Ah) is essential for understanding battery capacity and energy storage. While watt-hours measure energy, amp-hours measure charge, and the conversion requires knowing the system voltage.
The calculator uses the basic electrical formula:
Where:
Explanation: This formula converts energy (watt-hours) to charge (amp-hours) by accounting for the system voltage. Higher voltage systems require fewer amp-hours to store the same amount of energy.
Details: This conversion is crucial for battery sizing, solar power systems, and electrical engineering applications where you need to match energy requirements with battery capacities.
Tips: Enter the watt-hour value (typically 1000Wh for common calculations) and the system voltage (commonly 12V, 24V, or 48V for battery systems). Both values must be positive numbers.
Q1: Why is voltage important in this conversion?
A: Voltage determines how the energy is distributed in the system. The same energy (Wh) will require different amounts of charge (Ah) at different voltages.
Q2: What's the difference between Wh and Ah?
A: Watt-hours measure total energy (power × time), while amp-hours measure electrical charge (current × time). Wh gives a more complete picture of energy capacity.
Q3: When would I use 1000Wh in calculations?
A: 1000Wh (1kWh) is a common unit for battery banks and solar systems, representing a substantial but manageable amount of energy storage.
Q4: How does this relate to battery runtime?
A: Knowing Ah helps estimate runtime: divide battery Ah by your device's current draw (in amps) to estimate hours of operation.
Q5: Can I use this for AC systems?
A: For AC systems, you'll need to consider power factor and efficiency, but the basic conversion still applies to the DC components.