Eaton 9PX and 9SX Single-Phase UPS: Specs, Sizing, and Service
The Eaton 9PX and 9SX are online double-conversion single-phase UPS systems from about 0.7 to 11 kVA, protecting servers, network equipment, healthcare devices, and edge IT with continuous power conditioning and high efficiency. The 9PX offers high or unity output power factor and a lithium-ion option, and the modular 9PXM adds hot-swappable scalability. Comp-Utility, a long-standing Eaton distribution partner, supplies and services them across Central Texas.
What We Provide
Our Capabilities
Spec the Right 9PX or 9SX
We match the online single-phase model and runtime to your servers, edge, or medical loads, including lithium-ion options.
Learn moreDeployment and Monitoring
We deploy units with network management and battery monitoring for visibility into distributed sites.
Learn moreBattery Service and Replacement
Battery testing and replacement keep distributed 9PX and 9SX units protecting critical loads with full runtime.
Learn moreAlways-On Conditioning
True Online Protection for Sensitive Single-Phase Loads
The 9PX and 9SX use double conversion to continuously regenerate clean power with zero transfer time, which suits sensitive loads in healthcare, finance, and critical IT that cannot tolerate disturbances.
The 9PX adds high or unity output power factor for more real power per kVA, a lithium-ion option for longer life, and the modular 9PXM for hot-swappable scalability.
Key Specifications
| Attribute | Eaton 9PX / 9PXM | Eaton 9SX |
|---|---|---|
| Topology | Online double-conversion (9PXM modular) | Online double-conversion |
| Power rating | 0.7 to 11 kVA (9PXM modular) | 0.7 to 11 kVA |
| Voltage / phase | 120 / 208 / 230V, single-phase | 120 / 208 / 230V, single-phase |
| Form factor | Rack / tower | Rack / tower |
| Power factor | High / unity output PF | High output PF |
| Batteries | VRLA or lithium-ion; ABM management | VRLA; ABM management |
| Typical applications | Edge, healthcare, finance, critical IT | Servers, network, medical, light industrial |
Specifications reflect the Eaton 9PX/9PXM and 9SX product lines; exact ratings and configuration vary by model. Contact us to confirm the current configuration for your project.
The Comp-Utility Difference
Why Comp-Utility?
Long-Standing Distribution Partner
As a long-standing distribution partner of Eaton, Schneider Electric, and Vertiv, we specify best-in-class systems and back them with factory-grade service.
Engineer-Owned and Operated
Comp-Utility is owned and operated by engineers, with licensed Texas Professional Engineers (P.E.) on staff. That rigor anchors every design, specification, and installation.
Turnkey, Single-Contract Partner
We sell, design, install, and maintain complete infrastructure end to end. One accountable team and one contract for power, cooling, distribution, and cabling.
24/7 Emergency Response and Preventative Maintenance
Our technicians provide preventative maintenance programs and 24/7 emergency response, with rapid on-site dispatch across Central Texas when facilities need us most.
Licensed, Certified & Recognized
We hold ourselves to the standards of the institutions we serve, from professional licensure and jobsite safety to the industry organizations that set the bar for mission-critical work.
Licensed Professional Engineers
State of Texas (TBPE)
OSHA 30 Certified
Field Technicians
AFCOM Member
Data center industry association
7x24 Exchange Member
Mission-critical infrastructure
Frequently Asked Questions
What is the difference between the Eaton 9PX and 9SX?
Both are online double-conversion single-phase UPS systems from about 0.7 to 11 kVA. The 9PX is the premium line with high or unity output power factor, a lithium-ion option, and a modular 9PXM variant, while the 9SX is a cost-effective online option for continuous conditioning. Comp-Utility recommends the model based on your load sensitivity and budget.
Why choose an online UPS for single-phase loads?
Online double conversion continuously regenerates clean power with zero transfer time, fully isolating the load from utility disturbances. This is important for sensitive equipment in healthcare, finance, and critical IT. For less sensitive loads, a line-interactive UPS may suffice, but the 9PX and 9SX provide the highest level of single-phase protection.
What does unity power factor mean on the 9PX?
Unity (or near-unity) output power factor means the UPS can deliver its full rated capacity as real power (watts) rather than derating for power factor. This lets a 9PX support more actual load per kVA than older UPS designs, which can reduce the size or number of units needed for a given server load.
Does the 9PX support lithium-ion batteries?
Yes. The 9PX offers a lithium-ion battery option that provides longer service life, faster recharge, a smaller footprint, and higher temperature tolerance than VRLA. For edge and distributed sites where service visits are costly, the longer lithium-ion replacement interval is especially valuable. Comp-Utility can specify the chemistry that fits your deployment.
What is the 9PXM modular UPS?
The 9PXM is the modular version of the 9PX, using hot-swappable power and battery modules so capacity and runtime can scale and a module can be serviced without dropping the load. It suits growing IT rooms and high-availability single-phase applications. Comp-Utility configures the module count to your load and redundancy needs.
How do I size a 9PX or 9SX?
Sizing is based on the connected load in watts or VA and the runtime needed before shutdown, generator start, or restored power, with headroom for growth. The 9PX's high or unity power factor often allows more load per kVA. Comp-Utility calculates the load and recommends the model, runtime, and any extended battery packs.
Who supplies and services the 9PX in Central Texas?
Comp-Utility, a long-standing Eaton distribution partner, supplies, deploys, and services the 9PX, 9PXM, and 9SX across Central Texas, including battery testing and replacement and fleet support. Call (512) 346-0999 or email sales@comp-utility.com to source units or set up service.
How often should 9PX and 9SX batteries be replaced?
VRLA batteries in these units typically last three to five years, while the 9PX lithium-ion option lasts considerably longer. Eaton's ABM battery management helps extend life, but runtime shortfalls or replacement indicators signal the need to act. Comp-Utility tests and replaces batteries to keep rated runtime intact across distributed sites.
My UPS is in alarm, what do I do?
Call Comp-Utility right away at (512) 346-0999, and have the unit's model and serial number ready along with any alarm codes or messages shown on the UPS display. A unit in alarm can indicate a battery, load, or power-path issue that needs prompt attention. Because we maintain a large base of units under contract with the major UPS manufacturers, we can escalate directly to the right factory resources and coordinate service faster and more directly than a single end user calling general support, often getting you answers and a technician on site sooner.