Battery Bank Capacity Calculator
Calculate total Watt-hours (Wh) and Kilowatt-hours (kWh) for your battery bank.
Battery Bank Capacity Calculator
For series and parallel battery configurations
Results:
Total Voltage (V): 0.00
Total Amp-hours (Ah): 0.00
Total Watt-hours (Wh): 0.00
Total Kilowatt-hours (kWh): 0.00
How to Use the Calculator
Single Battery
- Enter the battery's voltage (V).
- Enter the battery's Amp-hour (Ah) rating.
- Set "Number of Batteries (in series)" to 1.
- Set "Number of Batteries (in parallel)" to 1.
- Click "Calculate" to see Wh and kWh.
Series Connection
- Enter individual battery V and Ah.
- Enter the number of batteries in series.
- Set "Number of Batteries (in parallel)" to 1.
- Total Voltage increases, Ah remains same.
Parallel Connection
- Enter individual battery V and Ah.
- Set "Number of Batteries (in series)" to 1.
- Enter the number of batteries in parallel.
- Total Ah increases, Voltage remains same.
Battery Bank Fundamentals
Series Connection
Connecting batteries in series increases the total voltage of the bank while keeping the Amp-hour (Ah) capacity the same as a single battery.
- Total Voltage = Individual Battery Voltage × Number of Batteries in Series
- Total Ah = Individual Battery Ah
Parallel Connection
- Connecting batteries in parallel increases the total Amp-hour (Ah) capacity of the bank while keeping the voltage the same as a single battery.
- Total Voltage = Individual Battery Voltage
- Total Ah = Individual Battery Ah × Number of Batteries in Parallel
Key Formulas:
Total Voltage (V) = Battery Voltage × Number in Series
Total Amp-hours (Ah) = Battery Amp-hours × Number in Parallel
Watt-hours (Wh) = Total Voltage (V) × Total Amp-hours (Ah)
Kilowatt-hours (kWh) = Wh / 1000
Calculation Formulas
Total Voltage:
V_total = V_battery × N_series
Total Amp-hours:
Ah_total = Ah_battery × N_parallel
Watt-hours:
Wh = V_total × Ah_total
Kilowatt-hours:
kWh = Wh / 1000
Example Calculation
Consider 4 batteries, each 12V and 100Ah, configured as 2 in series and 2 in parallel:
Battery Voltage: 12V
Battery Amp-hours: 100Ah
Number in Series: 2
Number in Parallel: 2
Total Voltage = 12V × 2 = 24V
Total Ah = 100Ah × 2 = 200Ah
Total Wh = 24V × 200Ah = 4800 Wh
Total kWh = 4800 Wh / 1000 = 4.8 kWh
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