Eaton UPS

About Eaton UPS

What is an Eaton UPS?

Eaton is one of the three dominant UPS manufacturers worldwide, with an engineering lineage running back through Powerware and MGE Office Protection Systems. The brand's strength is the online double-conversion space: the Eaton 9PX, 9SX, and 93PM platforms are specified in data centres, hospitals, telecom exchanges, and industrial control rooms where load sensitivity rules out any transfer-time topology. Eaton also builds the 5P/5PX line-interactive family for standard server-rack deployments, and the Ellipse entry-level tower series.

UPSPLUSBATTERY.CA stocks over 270 Eaton part numbers across every active family plus matching replacement batteries. For broader comparison across brands, see our full UPS systems collection.

Eaton UPS product families explained

Eaton's family naming is the most logical in the industry — model number tells you topology and VA rating at a glance. The table below maps every current Eaton UPS family to the load it was built for.

For most SMB rack buyers, the decision sits between two families: the 5P/5PX line-interactive (lower cost, 2–4 ms transfer, AVR) for standard server and network loads, and the 9PX double-conversion online (zero transfer, fully regenerated output, unity power factor) for medical, VoIP, or any critical load that can't tolerate brief transfer gaps.

How to choose the right Eaton UPS

Sizing: VA and wattage

Every Eaton UPS is rated in both VA and watts. Eaton is ahead of most competitors here: current 5PX and 9PX models run a 0.9 or 1.0 power factor, meaning the nameplate VA is close to (or equal to) the actual watts available. A 9PX3000IRT2U delivers 3000 VA / 3000 W at unity PF — unlike older-generation competitors that would deliver only 1800 W from the same 3000 VA chassis.

Add up the nameplate wattage of every device that will plug into the UPS, multiply by 1.25 for a growth buffer, and match that number to the UPS's watt rating. Our UPS sizing guide walks through the method with worked examples.

Topology: line-interactive vs double-conversion online

Line-interactive (5P, 5PX, 5E): An automatic voltage regulator corrects brownouts and surges without touching the battery, extending battery life in regions with unstable grid voltage. Transfer time is 2–4 ms. Suitable for 80% of SMB server, networking, and POS loads.

Double-conversion online (9SX, 9PX, 93PM): The load runs permanently from the inverter, so transfer time is effectively zero and output voltage/frequency are fully regenerated. Required for medical equipment, VoIP PBX systems, precision lab gear, and any three-phase input. Eaton's 9PX platform is considered the benchmark in the 1–22 kVA single-phase online category. Read line-interactive vs online UPS for the decision criteria.

Form factor: tower, rackmount, or convertible

Eaton offers tower, 1U–6U rackmount, rack/tower convertible, and floor-standing cabinet (93PM three-phase). The 2U rack/tower convertible chassis is the most common choice for small server rooms — most 5P, 5PX, 9SX, and 9PX models at 1–3 kVA ship in this format with rail kits included.

Eaton UPS spec reference

The eight SKUs below cover the bulk of Canadian mid-market purchases across the 5P, 5PX, 9SX, and 9PX lines. Use this as a quick-reference shortlist.

All models above ship with Eaton Intelligent Power Manager (IPM) software. 9PX and 9SX units include a Gigabit Network-M2 card slot; the Network-M2 card is included on most rack/tower G2 SKUs and sold separately on older units.

Replacement batteries for Eaton UPS

Eaton uses part numbers in the 744-A and MN- series for replacement battery kits. Every 5P, 5PX, 9SX, and 9PX ships with the battery part number printed on the unit label and listed in the user manual. Common cartridges include 744-A3121 (fits 5P1500R, 5PX1500RT, 9SX1500, 9PX1500RT) and 744-A2992 (fits 5PX3000RT and 9PX3000RT2U).

Eaton external battery modules (EBMs) snap onto 9PX and 9SX units to extend runtime — a 9PX1500RT plus a 9PXEBM48RT delivers roughly 45 minutes at full load versus 5 minutes stock. See our UPS replacement batteries collection for the full Eaton matrix.

Installation, warranty and support

Every Eaton UPS sold by UPSPLUSBATTERY.CA ships from a Canadian warehouse with full manufacturer warranty — typically three years on electronics and two years on battery for 5P/5PX/9SX/9PX, with extended warranty options available. Our team handles pre-sales sizing, RMA coordination, and post-installation commissioning questions by phone and email.

For line-interactive and online UPS up to 3 kVA, the unit ships ready to plug in. For 9PX 5 kVA and above, hard-wire input is typically required and should be completed by a licensed electrician per CSA. Three-phase 93PM installations always require commissioning by a qualified Eaton-authorised technician.

Frequently asked questions

What is the difference between Eaton 5PX and 9PX?

5PX is line-interactive with a 2–4 ms transfer to battery and AVR correcting brownouts between events. 9PX is double-conversion online: zero transfer time, fully regenerated output, unity power factor. 9PX costs roughly 40–60% more per VA but is the required topology for medical equipment, VoIP, and any load that can't tolerate brief transfer gaps. For standard server and network-closet use, 5PX is the right fit.

How do I know what size Eaton UPS I need?

Add up the nameplate wattage of every device, multiply by 1.25 for a growth buffer, and pick a UPS whose watt rating exceeds that number. A 1U server at 400 W plus a switch at 80 W plus a firewall at 40 W equals 520 W × 1.25 = 650 W — a 5P1500R (1440 W) gives real headroom. Our UPS sizing guide walks through the method.

Eaton vs APC — which is better?

Both brands cover the full single-phase market well. APC has a deeper management-software ecosystem (PowerChute integrates tightly with VMware and Hyper-V) and a much larger install base, which means more replacement-battery availability decades after a model ships. Eaton is stronger in the online category — the 9PX is frequently spec'd where APC's equivalent Smart-UPS SRT is not — and Eaton's unity-PF implementation reaches further down the product line than APC's. For IT closets and standard server racks, APC is the safer choice; for medical, industrial, and 6+ kVA online, Eaton is often the better-value pick. Compare APC Smart-UPS against the Eaton 5PX/9PX range.

How long do Eaton UPS batteries last?

Eaton rates its sealed lead-acid batteries for four to five years of useful life in a climate-controlled environment (20–25 °C). Lithium-ion options on the 9PX G2 platform are rated for ten years. High ambient temperature is the single largest factor shortening life. IPM software flags the battery once internal impedance crosses the threshold.

Can I replace Eaton UPS batteries myself?

On every current 5P, 5PX, 9SX, and 9PX, the battery is user-replaceable and hot-swappable — you can swap it while the UPS continues to protect the load. Always use the Eaton 744-A or MN- part number listed on the unit label, and follow the front-panel prompt to reset the battery install date.

Does Eaton make three-phase UPS?

Yes. The 93PM and 93E platforms cover three-phase loads from 20 kVA to 1.2 MW. These are data-centre-grade modular UPS with hot-swappable power and battery modules, N+1 redundancy options, and full SNMP/Modbus integration. Three-phase installations require commissioning by a qualified Eaton-authorised technician and are outside the scope of plug-and-play deployment.

Do Eaton UPS units come with a warranty?

Yes. Every Eaton UPS sold by UPSPLUSBATTERY.CA carries the full manufacturer warranty — typically three years electronics and two years battery on 5P/5PX/9SX/9PX, with extended service contracts available through Eaton Canada. Warranty is serviced by our Canadian team in coordination with Eaton Canada, so RMA turnaround does not require cross-border shipping.