Eaton 9PX UPS Systems

Eaton 9PX online double-conversion UPS systems

The Eaton 9PX is a premium online double-conversion UPS series built for IT racks, network closets, edge sites, and mission-critical equipment that cannot tolerate a dropout. Every model in this range continuously rebuilds a clean pure sine wave output, protecting your load from sags, surges, frequency drift, and brownouts on the incoming mains. In Eaton's single-phase lineup the 9PX sits above the line-interactive 5PX as the always-on, double-conversion tier, and the units here span roughly 1,500 VA / 1,350 W up to 11,000 VA / 11,000 W: covering everything from a single rack of servers to a small computer room. Most models ship as tower/rack-convertible chassis; the series also includes dedicated rackmount (4U and larger) and tower configurations, plus lithium-ion variants for longer service life and extended runtime.

Models in this series

A representative selection is shown below. See the full range of 9PX models listed on this page for every voltage, outlet, and runtime option.

How to choose a 9PX

Size by watts, not just VA. A UPS carries two numbers: volt-amps (VA) and watts (W). Your real load is measured in watts, so add up the wattage of everything you intend to protect and pick a 9PX whose watt rating comfortably exceeds it (aim to load it to roughly 70–80% so you keep headroom and runtime). Across this series the W rating ranges from 1,350 W on the 1.5 kVA model up to 11,000 W on the largest units.

Match runtime to your shutdown plan. The figures above are internal-battery runtimes at half and full load; they are meant to ride through short outages and give servers a graceful, automated shutdown. If you need minutes to become tens of minutes or hours, every 9PX in this range is extended-runtime capable: you add matching Eaton battery modules (EBMs) to scale runtime. Lithium-ion 9PX models carry a longer warranty and longer battery service life, which is why several here show a 5-year warranty versus 3 years on the standard models.

Topology. The entire 9PX series is online double-conversion. Unlike a line-interactive UPS (such as Eaton's 5PX), an online UPS runs the load through the inverter at all times with zero transfer time and full voltage/frequency regulation: the right choice for servers, storage, networking, medical, and other sensitive or transfer-intolerant equipment.

Rack vs tower. Most 9PX units are tower/rack convertible, so you can stand one beside a workstation today and rack it later. The series also includes dedicated rackmount (4U+) and tower-only models. Check the form-factor and outlet columns on each product to confirm the chassis depth, output voltage (120 V, 208 V, or 230 V), and receptacle types match your PDU and rack.

Why the 9PX series

• True online protection: continuous double-conversion with a pure sine wave output and effectively zero transfer time.
• High power factor: many 9PX models deliver a 1.0 VA-to-watt ratio (e.g. the 3 kVA, 5 kVA and larger units), so you get more usable watts per VA.
• Flexible deployment: tower, rack, and convertible chassis with 120 V, 208 V, and 230 V output options and a wide mix of NEMA and IEC outlets.
• Scalable runtime: every model is extended-runtime capable via Eaton battery modules.
• Lithium-ion option: selected 9PX models use LiFePO4 batteries for longer life and a 5-year warranty.

Warranty, Canadian shipping & support

Standard 9PX models carry a 3-year manufacturer warranty; lithium-ion 9PX models carry a 5-year warranty. We are a Canadian reseller and ship Eaton 9PX systems from Canada. Our team can help you size the right model and the right battery modules before you order.

Related collections

Already running a 9PX and need cells? See our matching Eaton UPS replacement batteries collection for compatible battery modules and replacement packs. To compare the rest of the lineup, including the line-interactive 5PX and three-phase systems, visit the main Eaton UPS systems brand page.

Frequently asked questions

Is the Eaton 9PX online or line-interactive?
Online double-conversion. The load always runs through the inverter, giving a regulated pure sine wave output and zero transfer time: the standard for servers and other sensitive loads.

What size 9PX do I need?
Total up the wattage of your equipment and pick a model whose watt rating exceeds it with headroom (target about 70–80% load). This range covers 1,350 W up to 11,000 W.

Can I get more runtime than the table shows?
Yes. Every 9PX here is extended-runtime capable: add matching Eaton battery modules (EBMs) to increase backup time.

What is the difference between the standard and lithium-ion 9PX models?
Lithium-ion (LiFePO4) 9PX models offer longer battery service life, lighter weight, and a 5-year warranty versus 3 years on the standard valve-regulated lead-acid models.

Can the 9PX mount in a rack?
Most 9PX units are tower/rack convertible; the series also includes dedicated rackmount (4U+) chassis. Check each product's form-factor and outlet specs to confirm fit.

Model names and trademarks belong to their respective owners. We are not affiliated with, authorized by, or certified by Eaton. All specifications are drawn from manufacturer data and are subject to change: confirm details on the individual product page before ordering.