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Battery Sizing Software

The ETAP Battery Sizing module provides you with a powerful tool to accomplish this task. In complying with IEEE Standard 485-1997, the Battery Sizing module determines the number of strings, number of cells, and cell size of a battery for a designated duty cycle. The number of cells is determined to satisfy the maximum system voltage during the battery charging period and the minimum system voltage during the battery discharging period. The number of strings and cell size is determined to provide sufficient power to the load cycle considering the minimum system voltage and the minimum operating temperature. Battery Sizing Analysis Software also considers different factors that affect battery performance, such as design margin, aging compensation, initial capacity, and temperature, etc.

Battery Sizing Analysis Software Key Features


  • IEEE Standards 308, 485, 946
  • Integrated AC, DC, & Control System Diagram
  • Voltage drop & loss consideration
  • Class 1E DC power & control system models
  • Duty cycle diversity factor
  • Load model type per operating characteristics
  • Battery duty cycle calculated from individual loads
  • Options for battery & load duty cycle 1 min span
  • Multiple user selected options for battery characteristic interpolation
  • Multiple diversity & correction factors
  • Battery sizing report in IEEE 485 format
  • Plot battery capacity, voltage, & current
  • Plot bus voltage & load & branch flow
  • Detailed battery library


Battery Sizing Analysis Software Standards


  • IEEE 308
  • IEEE 485
  • IEEE 946


Battery Sizing Analysis Software Capabilities


  • Load flow method (includes losses & voltage drops)
  • Duty cycle summation method
  • Automatic battery size verification by battery discharge simulation
  • Automatic addition of random load at the lowest battery terminal voltage
  • Multiple load duty cycles for simulating different practical scenarios
  • Load duty cycle adjustment based on load diversity & battery correction factors
  • Unlimited number of system configurations to easily simulate different emergency conditions


Battery Sizing Software

Battery Correction Factors


  • Temperature
  • Aging
  • Initial capacity
  • Design margin


Plot Options


  • Battery voltage, Amp, & AH
  • Battery duty cycle (random & non-random loads)
  • Battery characteristic curves
  • Branch current & power flow
  • Bus voltage & loading
  • Zoom to any detail level
  • Export data to Microsoft Excel
  • Line, bar, 3-D, & scatter plots
  • Change text & axes




  • Battery & load duty cycle
  • Battery characteristics
  • IEEE 485 format
  • Tabulate simulation results
  • Export one-line diagrams with results to third party CAD systems
  • Use Crystal Reports for full color, customizable reports