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12 Volt Inverter Battery Equation:
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The 12 Volt Inverter Battery calculation determines the required battery capacity (in ampere-hours) to power electrical devices through an inverter for a specified duration. This helps in selecting the appropriate battery size for your power needs.
The calculator uses the equation:
Where:
Explanation: The equation calculates the battery capacity needed by dividing the total energy consumption (watt-hours) by the battery voltage.
Details: Proper battery sizing is essential for ensuring uninterrupted power supply, preventing battery damage from over-discharge, and optimizing the performance and lifespan of your inverter system.
Tips: Enter the total power consumption in watts and the desired runtime in hours. Both values must be positive numbers for accurate calculation.
Q1: Why divide by 12 in the formula?
A: We divide by 12 because we're working with a 12-volt battery system. The formula converts watt-hours to ampere-hours by dividing by the battery voltage.
Q2: Does this account for inverter efficiency?
A: No, this is a basic calculation. For more accurate results, you should factor in inverter efficiency (typically 85-95%) by dividing the result by the efficiency percentage.
Q3: What about battery depth of discharge?
A: This calculation gives the usable capacity needed. For lead-acid batteries, you should typically only discharge to 50% capacity, so you may need to double the calculated Ah value.
Q4: Can I use this for different battery voltages?
A: This calculator is specifically for 12-volt systems. For other voltages, replace 12 with the appropriate battery voltage in the formula.
Q5: How accurate is this calculation for real-world applications?
A: This provides a theoretical minimum. Real-world factors like temperature, battery age, and cable losses may require a larger battery capacity than calculated.