SpecCalc Hub · Medium
Battery Runtime Calculator
Estimate runtime from capacity, voltage, battery count, depth of discharge, efficiency, and load.
Formula
nominal_wh = capacity converted to Wh * battery_count usable_wh = nominal_wh * DoD * efficiency runtime_hours = usable_wh / load_w
Assumptions
- Inputs are user-provided.
- Results are preliminary estimates.
- Load is constant and battery capacity is accurate.
Limitations
- Does not model age, temperature, BMS cutoff, voltage sag, surge loads, or Peukert effect.
Methodology
Converts battery capacity to usable Wh and divides by load.
This calculator provides an estimate for informational purposes only. It is not a certified engineering design, electrical safety approval, or professional installation recommendation. Always verify final decisions with a qualified professional and applicable local codes.