Backup Power Configurator - AI Data Center Configurator

Input parameters

IT load (carried by UPS)

See “effective IT load” on the Power page

Total data-center power (genset carries everything)

See “total power” on the Power page

UPS redundancy

N+1 is the industry standard; 2N for finance / core compute HA scenarios

Load power factor (UPS kVA rating)

UPS design margin

Battery backup time

UPS efficiency (incl. transformer)

Genset redundancy

Genset capacity factor (start/transient/altitude)

Redundancy architecture

Architecture	Availability	Note
N	99.9% order	No redundancy; a single fault interrupts
N+1	99.99% order	One spare unit/system; industry mainstream
2N	99.999% order	Two independent paths backing each other up

Results

UPS installed capacity

— kVA

Battery system capacity
— kWh

Total genset capacity

— kVA

Genset count (2000kVA units)

— units

UPS per unit (N+1 split)

— kVA/unit

Battery discharge power

— kW

Calculation notes

UPS capacity = IT load ÷ PF × (1 + margin) × redundancy factor (N+1 = 1.25)
Battery capacity = IT load × backup hours ÷ UPS efficiency (load fed by UPS)
Genset capacity = total power ÷ 0.8 × capacity factor × redundancy factor (gensets rated in kVA, PF 0.8)

Recommendation

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Genset sizing reference

Genset capacity — kVA (≈ — kW)

Redundancy

Diesel gensets (data-center typical: 10kV HV paralleling / 0.4kV LV)

Brand / series

Recommended model	Capacity / unit	Units	Total capacity	Full-load fuel use	12h day tank	Note

Capacities are typical standby ratings (kVA); final selection per vendor manual. Fuel estimated at full load 0.21 L/kWh (diesel ≈ 0.84 kg/L); design a 12h day tank plus bulk storage for 24–72h. Top-page “capacity factor / redundancy” corrects capacity; here redundancy adds units separately.