EV Road Trip Battery Degradation Calculator

1. Enter battery capacity

Use the nominal usable battery size for the vehicle.

2. Add annual road-trip energy

Estimate battery energy used specifically for road-trip travel each year.

3. Choose the time horizon

Set the number of years covered by the scenario.

4. Define baseline aging

Enter assumptions for cycle fade and calendar fade.

5. Represent charging behavior

Set the share of energy from DC fast charging and any extra fast-charge or high-SOC loss.

6. Review remaining capacity

Compare total loss, remaining capacity, and equivalent cycle counts.

Equivalent cycles = Annual road-trip energy × Years ÷ Battery capacity Fast-charge cycles = Equivalent cycles × Fast-charge share Total loss (%) = Cycle loss + Calendar loss + Fast-charge penalty + High-SOC annual loss

Cycle loss uses the entered rate per 1,000 equivalent cycles. The fast-charge term applies only to the fast-charge share of throughput.

What the result means

The result estimates how much nominal capacity may be lost under the entered road-trip and aging assumptions.

The estimate is for scenario comparison and should not replace measured battery state-of-health data.

Given: 78 kWh battery, 4,800 kWh of road-trip energy per year, 6 years, 5% loss per 1,000 cycles, 1.1% calendar loss per year, 75% fast-charge share, 1.5% extra loss per 1,000 fast-charge cycles, and 0.3% annual high-SOC loss.

Calculation: Equivalent cycles = 4,800 × 6 ÷ 78 = 369.2. Fast-charge cycles = 369.2 × 75% = 276.9. Cycle loss = 1.85%; calendar loss = 6.60%; fast-charge penalty = 0.42%; high-SOC loss = 1.80%. Total = 10.66%.

Result: Estimated remaining capacity is 89.34%.