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Battery Calculators

Batteries in Series Calculator

Voltage and capacity of a battery string wired in series.

Enter values

Results update as you type.

Result

String voltage

48 V

Series adds voltage but keeps capacity the same — always use identical, equally charged batteries.

String capacity
100 Ah
capacity does not change in series
Total energy
4.8 kWh
Batteries in the string
4
Current at 1 kW load
20.833 A

About the Batteries in Series Calculator

Voltage and capacity of a battery string wired in series.

Also known as: series battery voltage, batteries in series, battery string voltage.

How to use this calculator

  1. Enter number of batteries, voltage each, capacity each.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

V_total = n × V_each · Ah unchanged

Worked example

Using the values pre-filled in the calculator above:

  • Number of batteries = 4
  • Voltage each = 12 V
  • Capacity each = 100 Ah

the calculator returns:

  • String voltage: 48 V
  • String capacity: 100 Ah
  • Total energy: 4.8 kWh
  • Batteries in the string: 4