Off-Grid Energy Converter

Watt-Hours to Amp-Hours Converter

Sizing battery banks for solar generators that advertise capacity in Wh. Computes Amp-hours from total energy in Watt-hours at specified system voltage.

Watt-Hours to Amp-Hours Converter
Watt-Hours (Wh)
Volts
Calculated Result
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Instant Calculation
Auxiliary Value
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Engineering Output
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Step-by-Step Derivation ▼ Show Steps
Governing Formula Verified Physics
Amp-Hours (Ah) = Watt-Hours (Wh) / Voltage (V)

Calculations adhere to standard electrical equations and National Electrical Code guidelines.

Engineering Principles & Calculations

This calculator uses the exact mathematical relationships between Energy (Wh), Voltage (V) to determine Capacity (Ah). In practical applications, electrical systems must account for safety derating factors, nominal vs actual voltages, and conductor resistance losses.

Computes Amp-hours from total energy in Watt-hours at specified system voltage.

Typical Application & Best Practices

Sizing battery banks for solar generators that advertise capacity in Wh.

Reference Matrix

Watt-Hours to Amp-Hours Converter Benchmark Lookup Table

Energy (Wh)At 12VAt 24VAt 48V
600 Wh50.0 Ah25.0 Ah12.5 Ah
1,200 Wh100.0 Ah50.0 Ah25.0 Ah
2,400 Wh200.0 Ah100.0 Ah50.0 Ah
4,800 Wh400.0 Ah200.0 Ah100.0 Ah
9,600 Wh800.0 Ah400.0 Ah200.0 Ah
FAQ

Frequently Asked Questions

How do you convert Watt-Hours to Amp-Hours? +
Divide Watt-Hours by system voltage: Ah = Wh / Volts. For example, 1200Wh / 12V = 100 Ah.
Why does a 24V system need half the Amp-Hours of a 12V system? +
Because Power = V × I. Doubling voltage cuts required current and Amp-Hours in half for the exact same total Watt-Hour capacity.
How many Ah is 1 kWh of solar storage? +
1 kWh = 1000 Wh. At 12V: 1000/12 = 83.3 Ah. At 24V: 1000/24 = 41.7 Ah. At 48V: 1000/48 = 20.8 Ah.

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