How to use this calculator
- Enter original capacity and battery age.
- Estimate annual equivalent full cycles.
- Enter cycle and calendar fade assumptions.
- Use the stress multiplier for harsher or gentler conditions.
#1336 · Energy & Environment Tool
Electric Truck Battery Degradation Calculator
Estimate capacity loss for an electric truck battery from cycle use, calendar aging, operating temperature, and frequent fast charging. Translate remaining battery health into usable energy and approximate range.
Calculator
Fleet scenario inputsFormula
Cycle loss = cycles/year × years ÷ 1,000 × loss per 1,000 cycles. Total estimated loss = (cycle loss + calendar loss/year × years) × stress multiplier, capped at 100%.
What the result means
The main result is estimated remaining battery capacity, often called state of health. Usable energy and range scale proportionally for planning purposes.
This is a scenario model, not a battery diagnostic. Vehicle battery-management data and a controlled capacity test provide better evidence.
Example calculation
After 4 years at 280 cycles/year, 6% loss per 1,000 cycles, 1.5% calendar loss/year, and a 1.15× stress multiplier, estimated remaining capacity is 85.4%.
Tips for better results
- Use equivalent full cycles, not plug-in count.
- Separate observed calendar and cycling assumptions.
- Avoid treating the result as a warranty determination.
- Compare scenarios with lower heat exposure or fast-charge frequency.
Frequently asked questions
What is an equivalent full battery cycle?
Partial discharge and recharge events add together; for example, two 50% uses equal roughly one full cycle.
Is battery degradation linear over time?
Not necessarily. This calculator uses a simplified linear planning model, while real degradation can change with age and operating conditions.
How should I choose the stress multiplier?
Use 1.0 as the baseline assumption, above 1.0 for harsher heat or frequent fast charging, and below 1.0 only when supported by fleet data.
Does remaining capacity equal remaining driving range?
Range often changes roughly with usable capacity, but weather, payload, speed, and auxiliaries also matter.
Can this estimate determine warranty eligibility?
No. Warranty decisions require the manufacturer’s definitions, diagnostics, and service process.
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Inputs and units
| Input | How it is used |
|---|---|
| Vehicle and battery values | Define the energy or capacity scenario. |
| Operating assumptions | Adjust the estimate to the fleet plan. |
| Result | Planning estimate; validate against vehicle and charger data. |