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How long will a 100ah battery run an appliance that requires 400w?

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How long will a 100ah battery run an appliance that requires 400w?

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Ah to kWh Conversion Formula

The electrical energy in kilowatt-hours is equal to the charge in amp-hours times the voltage, then divided by 1,000. For example, let's convert 20 Ah at 120 V to kWh. You might be interested in our milliamp-hours to watt-hours calculator.

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