Unity Power Factor UPS Systems
When you size a UPS, the gap between apparent power (kVA) and real power (kW) decides how much usable capacity you actually get. That ratio is the power factor — and a unity (1.0) power factor UPS delivers full kVA as usable kW, so none of your investment goes to overhead.
Older 0.8 PF systems quietly stranded up to a fifth of your capacity. Modern, power-factor-corrected IT loads need a UPS that keeps up — which is why every kilowatt counts in data centers, edge sites, and high-density server rooms.
kW, kVA, and power factor
Power factor is the ratio of working power (kW) to apparent power (kVA). Apparent power — also called demand — is what it takes to run equipment over a period, found by multiplying volts × amps. A 96% power factor is more efficient than a 75% one; below 95% is considered inefficient in many regions.
The real, usable power actually consumed by your equipment.
The total power drawn, including reactive power overhead (V × A).
kW ÷ kVA. The closer to 1.0, the more of your capacity is usable.
Why unity power factor matters
A UPS must be sized to meet both its kVA and kW ratings — exceed either and it overloads. The power factor sets how those two relate.
- Legacy 0.8 PF: a 20 kVA UPS at 0.8 PF delivered only 16 kW of usable power — leaving IT managers with far less real capacity than the nameplate suggested.
- Modern IT runs near unity: power-factor-corrected equipment needs a UPS that delivers full kVA = kW output to match.
- 1.0 PF maximizes your investment: a unity power factor UPS gives you the maximum usable kW — improving efficiency by up to 25% versus older 0.8 PF systems.
- Ideal where capacity is tight: data centers, edge computing, enterprise IT, and high-density server rooms where every kilowatt counts.
Power factor comparison
| UPS Rating | Power Factor | Real Power (kW) | Example Models | Usable vs 20 kVA |
|---|---|---|---|---|
| 20 kVA | 0.8 PF | 16 kW | Legacy UPS (older APC / Eaton / Vertiv) | 80% of capacity |
| 20 kVA | 1.0 PF (Unity) | 20 kW | XPC M90S-12S, Li90, M90C, M90U, X90-2S | 100% of capacity |
A unity power factor UPS delivers full kVA as usable kW — more IT load support, higher efficiency, and a better return on investment.
Unity power factor UPS solutions
A complete range of 1.0 PF systems for modern data centers, enterprise IT rooms, and edge computing — each engineered to support power-factor-corrected loads and deliver the full performance you paid for.
Compact, scalable design with unity PF output — ideal for server rooms and distributed IT.
High-efficiency lithium-ion UPS with extended battery life and a compact footprint.
Scalable, modular architecture for high-density data center UPS applications.
Next-generation UPS with 1.0 PF, advanced redundancy, and maximum availability.
Online, high-efficiency 1.0 PF UPS for network, retail, and office applications.
Compact three-phase UPS for critical applications.
Where unity PF systems fit
Long-life UPS solutions eligible for E-Rate funding.
Don’t settle for outdated 0.8 PF UPS systems
With Xtreme Power’s unity power factor lineup, you get the full kVA as usable kW — higher efficiency, more runtime per cabinet, and a better return on investment. Our team will help you size the right 1.0 PF UPS for your application.