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WrapCalc

EV Fast-Charge Taper Time Estimator

How long the last 20% really takes on DC.

Inputs

Inputs and assumptions

Usable pack.

Often 25-40% of peak. Check curve tests.

DC loss ~3-6.

Result

Energy in taper window
—
80-100% taper time
—

What to check

  • Battery kWh
  • Taper power

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This calculator is a first-pass screening tool. Verify rates, equipment specs, and installer quotes before making a decision.

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