UPS Runtime & Sizing Calculator

Estimate how long a UPS will run your equipment, and the UPS rating you need.

Load (W)

Battery voltage (V)

Battery capacity (Ah)

Number of batteries

Inverter efficiency (%)

Load power factor

Sizing headroom (%)

Results

Battery energy: 216 Wh

Estimated runtime: 58 min

Minimum UPS rating: 278 VA

Suggested UPS size: 600 VA

Runtime is an estimate: batteries deliver less at high loads, low temperatures and as they age. Check the UPS maker's runtime chart for the final figure.

How it works

Battery energy is volts x amp-hours x number of batteries. Runtime is that energy x inverter efficiency divided by the load. The UPS rating is the load divided by its power factor, plus headroom, rounded up to a common UPS size.

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UPS & Power Protection

Uninterruptible power systems and power filtration products, engineered for reliability in the Australian market.

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