Amp-Hours (Ah) to Kilowatt-Hours (kWh) Converter
Convert battery capacity from amp-hours to kilowatt-hours by entering the values below.
Conversion Result:
Common Battery Voltages
Amp-Hours to Kilowatt-Hours Conversion Table
| Amp-Hours (Ah) | Voltage (V) | Kilowatt-Hours (kWh) |
|---|---|---|
| 100 | 12 | 1.200 |
| 100 | 24 | 2.400 |
| 100 | 48 | 4.800 |
| 200 | 12 | 2.400 |
| 200 | 24 | 4.800 |
| 200 | 48 | 9.600 |
| 300 | 12 | 3.600 |
| 300 | 24 | 7.200 |
| 300 | 48 | 14.400 |
| 500 | 12 | 6.000 |
| 500 | 24 | 12.000 |
| 500 | 48 | 24.000 |
Understanding Ah to kWh Conversion
What are Amp-Hours (Ah)?
Amp-hours (Ah) are a unit of electrical charge commonly used to measure battery capacity. One amp-hour represents the amount of charge transferred by a steady current of one ampere flowing for one hour. For example, a 100 Ah battery can theoretically supply 1 ampere of current for 100 hours, or 5 amperes for 20 hours.
What are Kilowatt-Hours (kWh)?
Kilowatt-hours (kWh) are a unit of energy commonly used to measure electricity consumption. One kilowatt-hour represents the energy consumed by a device drawing one kilowatt (1,000 watts) of power for one hour. This is the unit typically used by utility companies to bill for electricity usage.
Conversion Formula
To convert from amp-hours (Ah) to kilowatt-hours (kWh), you need to know the voltage (V) of the system. The formula is:
kWh = (Ah × V) ÷ 1,000
Where:
- kWh = Energy in kilowatt-hours
- Ah = Charge capacity in amp-hours
- V = Voltage in volts
- 1,000 = Conversion factor from watts to kilowatts
Step-by-Step Conversion Example
Let's convert a 200 Ah battery at 24 V to kilowatt-hours:
- Identify the battery capacity in amp-hours: 200 Ah
- Identify the battery voltage: 24 V
- Apply the formula: kWh = (Ah × V) ÷ 1,000
- Calculate: kWh = (200 × 24) ÷ 1,000
- Calculate: kWh = 4,800 ÷ 1,000
- Result: kWh = 4.8 kWh
Therefore, a 200 Ah battery at 24 V has an energy capacity of 4.8 kilowatt-hours.
Practical Applications
This conversion is particularly useful in several scenarios:
- Solar Energy Systems: Converting battery storage capacity from Ah to kWh helps in sizing solar panels and estimating how long the stored energy will last.
- Electric Vehicles: Understanding the energy capacity of EV batteries in kWh helps estimate driving range.
- Off-Grid Power Systems: Calculating the energy available from battery banks to power appliances and devices.
- Energy Cost Calculations: Converting to kWh allows you to estimate the cost of charging a battery using standard electricity rates.
Common Battery Voltages
Different battery systems operate at different voltages. Here are some common ones:
- 1.5V: Standard AA and AAA batteries
- 3.7V: Typical lithium-ion cell (smartphones, laptops)
- 12V: Car batteries, small solar systems
- 24V: Medium solar systems, electric scooters
- 48V: Large solar installations, electric bikes
- 400V+: Electric vehicles