What Is the Battery Depth of Discharge (DoD) & Cycle Life Calculator?
Depth of Discharge (DoD) indicates the percentage of a battery’s total capacity that has been discharged relative to its overall capacity.
Deeper discharge cycles place higher mechanical and thermal stress on battery electrodes, reducing lifespan.
How Does the Battery Depth of Discharge (DoD) & Cycle Life Calculator Work?
Multiplies amp-hours by nominal voltage to find total kilowatt-hours.
Applies the chosen DoD percentage to determine usable daily capacity.
Applies exponential cycle decay functions calibrated for each specific battery chemistry.
Battery Depth of Discharge (DoD) & Cycle Life Calculator Formula & Variables
The core mathematical equation utilized by this calculator is expressed as:
Calculates daily usable watt-hour output and projects total cumulative lifetime throughput from non-linear cycle degradation models.
How to Use the Battery Depth of Discharge (DoD) & Cycle Life Calculator
- Enter battery capacity in Ah and system voltage.
- Select battery chemistry (LiFePO4, Lead-Acid, or NMC).
- Set target depth of discharge percentage.
Step-by-Step Example Calculation
100 Ah 48V LiFePO4 Battery Pack operated at 80% DoD
Input Values:
Understanding Your Result
Shows usable energy per cycle and cumulative lifetime energy delivered across the pack’s service life.
Factors That Affect the Result
- Ambient operating temperature (heat accelerates chemical calendar aging; sub-freezing halts lithium charging).
When Should You Use This Calculator?
- Designing home solar energy storage (ESS), RV power systems, and off-grid telecommunication cabins.
Assumptions & Limitations
- Models cycle life to standard 80% capacity retention (end-of-life threshold).
Frequently Asked Questions
Calculation Accuracy & Reference Note
Calibrated against manufacturer lab cycling datasheets.