What this converter does
This converter turns ampere-hours into kilowatt-hours and back. Because energy is charge times voltage, enter the bank voltage — 48 V is the default for a home or solar battery. Type a value and read the result as you type.
Solar and EV banks are rated in Ah at cell level but in kWh for usable energy, so this conversion is a common sizing step.
The units it covers
Charge (Ah) and energy (kWh) are linked by the battery voltage — energy is charge times voltage.
View all units & their values
| Unit | Symbol | Value | Mainly used |
|---|---|---|---|
| Ampere-hour | Ah | charge | Battery charge rating |
| Kilowatt-hour | kWh | energy | Usable stored energy |
| Voltage | V | input | Nominal battery/bank voltage |
The formula
Energy equals charge times voltage, so ampere-hours and kilowatt-hours relate through the voltage:
kWh = Ah × V ÷ 1000Where:
- Ah = charge in ampere-hours
- kWh = energy in kilowatt-hours
- V = nominal bank voltage
Worked example
Convert 200 Ah at 48 V to kWh.
kWh = Ah × V ÷ 1000200 × 48 ÷ 1000 = 9.6 kWhSo a 200 Ah bank at 48 V stores 9.6 kWh.
The units in this example
A unit of electric charge — the cell-level capacity rating for solar, home and EV batteries.
- 1 Ah = 1,000 mAh
- kWh = Ah × V ÷ 1000
- 200 Ah @48V = 9.6 kWh
- 100 Ah @12V = 1.2 kWh
A unit of energy — the usable stored capacity of a battery bank and the unit utilities bill in.
- 1 kWh = 1,000 Wh
- Ah = kWh × 1000 ÷ V
- 9.6 kWh @48V = 200 Ah
- Ah × V ÷ 1000 = kWh