Choosing a UPS for your rack comes down to more than just VA ratings. You need enough outlets for the equipment you're protecting, a form factor that fits your rack, and confidence that the unit is ready to work. Here we're comparing two used rackmount uninterruptible power supplies: the APC Smart UPS 1500VA SMX1500RM2U and the Eaton 5P1500R. Both are black rackmount units, but they take different approaches to power, outlets, and rack space.
Quick verdict
If you need more outlets and are okay with a taller 2U chassis, the APC Smart UPS SMX1500RM2U is the stronger choice. If you want a slimmer chassis with a slightly lower price, the Eaton 5P1500R is worth a close look. The Eaton comes with a 30-day warranty and has been tested to hold a good charge, while the APC is sold without batteries, so that should be part of your budget.
Comparison at a glance
| Feature | APC Smart UPS SMX1500RM2U | Eaton 5P1500R |
|---|---|---|
| Listed price | USD 249.99 | USD 239.90 |
| Power rating | 1500 VA / 1200 W | 1440 VA / 1100 W |
| Outlets | 8 | 5 |
| Rack size | 2U | 1U |
| Display | LCD | LED display |
| Battery status | Does not include batteries | Holds a good charge |
Where the APC Smart UPS wins
The APC gives you more outlets and a higher wattage ceiling, which makes it the better fit for a small rack with multiple devices. The eight outlets let you connect a switch, modem, router, and other gear directly, and the 1200W maximum output gives you more headroom for startup power draws. If you don't mind buying batteries separately, this unit gives you more room to grow before you need a PDU.
Where the Eaton 5P1500R wins
The Eaton is the space-savvy pick. It offers a 1U form factor, enough outlets for a modest setup, and a warranty for extra peace of mind. It also includes an audible alarm and cold start capability, so you can power up equipment without utility power. If your rack is crowded and your power needs are modest, the Eaton makes a strong argument.
APC Smart UPS SMX1500RM2U
If you're protecting a small rack of network gear, this APC gives you the outlet count to plug in switches, routers, and other devices without needing a PDU right away. The 1500VA rating provides plenty of capacity for startup surges, and the LCD screen keeps status clear. The catch is that this unit is sold without batteries, so you'll need to add the cost of replacement batteries to your total. It's also a used unit, so give it a visual inspection when it arrives. For a dense rack where outlet count matters, this is the better starting point.
Eaton 5P1500R
The Eaton shines when rack space is tight. Its compact chassis leaves room for other gear in the same rack, and the five outputs are enough for a core switch and a few small devices. The LED display, audible alarm, and cold start feature give you solid control during an outage. The unit has been tested and holds a good charge, and it comes with a 30-day warranty. The main downsides are visible scuffs and scratches from storage and the five-outlet limit, which may require a PDU if your setup grows. At $239.90, it's a practical choice for smaller racks.
Final choice by use case
If rack space is your main constraint and you need a moderate number of outlets, the Eaton 5P1500R is the easy pick. If you want more outlets and higher power capacity, and you're comfortable sourcing batteries separately, the APC Smart UPS SMX1500RM2U is worth the extra cost. For those who need to power a handful of network devices in a crowded rack, the Eaton is the practical value. For a growing setup with more gear to protect, the APC gives you the headroom.
