Glossary
Kilowatt-hour
What is Kilowatt-hour?
A measure of an amount of energy: amp-hours times voltage, divided by a thousand. Unlike the amp-hour, it can be compared across voltage levels.
kWh = Ah × V ÷ 1000
What matters about Kilowatt-hour in practice?
A 200 Ah battery bank at 12 volts stores 2.4 kilowatt-hours, and so does a 100 Ah battery bank at 24 volts. Anyone comparing offers across different system voltages should therefore calculate in watt-hours.
For lithium systems, the figure in watt-hours has become common; for lead-acid, the figure in amp-hours. Both refer to the same storage, just measured differently.
Related terms
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