UPS sizing

Size backup power for your load and required runtime.

IEEE 1100 · IEC 62040-3

1 · Load schedule 0 items · apparent power per item, power factor, phase and crest factor

Description	Qty	Each	PF	Phase	CF	Actions

2 · System UPS output and redundancy

Output voltage

Phases

A 1-phase system needs every load row on L1.

Redundancy topology

2(N+1) is two N+1 paths. Dual paths need two full-duty battery banks.

3 · Operating conditions Design margin and derating

Growth

Added to the connected load; default 25 %.

Ambient

Derates above the 40 °C rated ambient.

Altitude

Derates above 1000 m, 1 % per 100 m by default.

4 · Autonomy Runtime on battery

Runtime target

At the post-failure design load.

Battery chemistry

Representative correction factors; cell selection is Battery Sizing (N° 14).

Results update as you change the schedule, system or autonomy.View results

Results

Review capacity, autonomy and the calculation basis.

solved

Detailed analysis Options, constraint ledger, battery and input, assumptions

Document

Keep project details and calculation notes together.

Audit-ready sheet

Notes

UPS frame and module count sized against the design load (connected × diversity × growth) for the stated redundancy topology.
Battery energy sized for the target autonomy by the simplified-Wh method (IEEE 1100 framing); rigorous cell selection is IEEE 485 (N° 14 Battery Sizing).
Rated-PF policy, efficiency curve and battery correction factors are assumptions — see the assumptions register; verify against vendor data before issue.

References

Awaiting inputs

— · Rev A · — Report Print / Save as PDF A professional aid, not engineering judgement — you remain responsible for verifying every input and result against the standards that apply to your work.