UPS Efficiency Comparison Calculator
Compare three UPS efficiency profiles against the same expected load and operating schedule. See how efficiency differences affect annual input energy and electricity cost.
Compare UPS efficiency options
UPS annual energy comparison
| Option | Efficiency | Input power | Useful energy | Loss energy | Total input energy | Annual cost |
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How the comparison works
Each UPS option is evaluated from the same useful output load. Higher efficiency requires less electrical input to deliver the same output.
Input power = Useful output ÷ Efficiency
Annual input energy = Input power × Profile hours
Annual energy cost = Annual input energy × Electricity price
Why operating hours are separate
A UPS efficiency advantage matters only during the time that the corresponding operating condition occurs. Keeping annual hours beside each option allows you to compare either different equipment profiles or different schedule assumptions.
Use real efficiency data
Enter manufacturer-published or measured efficiency values that correspond to the actual load condition being analyzed. A single nameplate figure may not represent every operating point.
Limitations
- Each option uses one efficiency value.
- Output load is held constant across options.
- Standby consumption is not separately modeled.
- Battery losses are outside this UPS efficiency comparison.
FAQs
Can annual hours differ between options?
Yes. This can represent different schedule assumptions, although a direct equipment comparison is usually easiest when the operating schedule is held equal.
Does the highest efficiency always have the lowest cost?
Not necessarily if it is assigned a different operating schedule or other costs outside this calculation.
Can efficiency be 100%?
Yes mathematically, resulting in zero modeled conversion loss.
Does this compare UPS purchase price?
No. It compares energy consumption and electricity cost.