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EV Battery State-of-Health Predictor

SoH from age + cycles + charging habits

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EV Battery State-of-Health (SoH) Predictor

Predict EV battery health from age, mileage, charging habits, climate. Critical for used-EV purchase decisions, lease-end valuations, warranty considerations.

How to use this tool

  1. 1

    EV details

    Age, mileage, charging habits.

  2. 2

    Climate exposure

    Hot climate damages battery 2× faster.

  3. 3

    Estimated SoH

    Plus residual value impact.

Frequently Asked Questions

How fast does EV battery degrade?
Average modern EV: 2-3% per year + cycle wear. After 5 years: ~85-90% SoH. After 10 years: 75-85%. Below 70% = warranty trigger for many OEMs.
What hurts battery most?
Heat (>35°C parking, fast-charging hot battery). DC-fast charging frequency (>50% of charges). Frequent 100% / 0% extremes. Long parked at high SoC.
Why does SoH matter for buying used?
Tesla SoH 88% vs 78% on similar mileage = 10% range loss + faster future degradation. Worth $3-7K price difference. Always verify before buying used EV.

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