AUWiring

Battery and backup calculators

Estimate battery runtime, capacity, DC current, fuse comparison and series-parallel arrangement values beside battery and BMS data.

  • 5 calculators
  • Australian workflow
  • 230/400 V a.c. context

Battery and backup calculators project basis

Estimate battery runtime, capacity, DC current, fuse comparison and series-parallel arrangement values beside battery and BMS data. These calculators support Australian design, estimating, installation and verification preparation. Keep the circuit, equipment, route, supply arrangement and source data with the result before it is used in a project record.

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Confirm the nominal 230/400 V a.c. or project-specific voltage basis, 50 Hz context where applicable, phase arrangement, metric units, manufacturer information, DNSP or authority conditions and current project documents before applying a result.

Check entered values, supply arrangement, cable or equipment data, product limits, DNSP or authority conditions and review limits before using the result.

Records covered

  • Battery runtimeEstimate runtime from entered Ah capacity, nominal DC voltage, load and usable fraction. Inputs: Battery capacity, nominal voltage, load and usable fraction. Output: Runtime and usable-energy worksheet requiring product, BMS and installation review.
  • Battery capacity sizingEstimate required battery capacity from entered load, target runtime, voltage and reserve. Inputs: Load, runtime target, DC system voltage and reserve allowance. Output: Required Ah and kWh worksheet that does not select equipment.
  • Battery charge/discharge currentEstimate DC current and C-rate from entered power, voltage, efficiency and battery capacity. Inputs: Battery power, charge/discharge mode, DC voltage, efficiency and Ah capacity. Output: Current handoff for cable, fuse, BMS and product review.
  • Battery fuse worksheetCompare an entered fuse rating with operating current, surge current and source criteria. Inputs: Operating current, surge current, fuse rating and source criteria. Output: Entered-data protection comparison, not fuse selection.
  • Battery series-parallelEstimate bank voltage, Ah and kWh from an entered series/parallel arrangement. Inputs: Cell voltage, cells per series, parallel strings, cell Ah and nominal voltage. Output: Arrangement worksheet, not product or BMS selection.

Review before applying

Battery and backup calculator results are preparation records. Keep entered values beside current Australian requirements, DNSP or authority conditions, manufacturer information and project documents before applying a result.

Recheck the selected calculator whenever the supply arrangement, equipment data, route length, tariff basis, measurement method or project document set changes.