Renewable Energy

Intermediate

Battery Runtime

How long a battery powers a load given depth of discharge.

Formula

t = \frac{E \times DoD}{P}

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Variables

tRuntime (h)

ECapacity (Wh)

DoDDepth of discharge

PLoad power (W)

Example

E=5000 Wh, DoD=0.9, P=500 W: t = 9 h

Did You Know?

Limiting depth of discharge to ~80–90% dramatically extends a lithium battery's lifespan.

renewable battery runtime

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