When you're shopping for rackmount UPS critical power, the toughest decision is often between a complete unit that's ready to run and a high-capacity chassis that needs a battery set. Two used rackmount UPS units illustrate this fork: the Eaton 5P 1550VA 1100W 1U Rackmount UPS Pure Sine Wave at $174.99 and the APC SRT3000RMXLA Smart-UPS SRT 3000VA Rackmount UPS (No Batteries) at $203.62. One is a 1U pure sine wave UPS that includes a lead acid battery; the other is a 2U 3000VA unit that is deliberately sold without batteries and has known defects. Here's how they compare and which one makes sense for your rack.
Quick Verdict
If you want a working UPS with battery included and pure sine wave output for a 1U space, the Eaton 5P1550GR is the more complete package and about 14% less expensive. If your load is large and you already have a 3000VA battery set, the APC SRT3000RMXLA offers a lot more capacity, but you'll have to deal with missing batteries, damaged bezel retaining clips, and a defective rear USB port.
At a Glance
| Product | Price | Capacity | Form Factor | Battery | Condition Notes | Price Bar |
|---|---|---|---|---|---|---|
| Eaton 5P1550GR | $174.99 | 1550VA / 1100W | 1U | Lead acid included | Used, tested to power on, light scratching | |
| APC SRT3000RMXLA | $203.62 | 3000VA / 2700W | 2U | No batteries | Used re-boxed, Grade C, damaged clips, defective USB |
Where Each Product Wins
Eaton 5P1550GR wins if you want a lower-priced, complete UPS that takes up only 1U and includes a lead acid battery. It produces pure sine wave and supports input voltages from 200V to 240V. The used condition is acknowledged with light scratching and scuffing, but it was tested to power on.
APC SRT3000RMXLA wins if you need much more capacity in a 2U form factor and don't mind sourcing batteries separately. Its 3000VA / 2700W rating is nearly double the Eaton's output. The trade-off is that it's a re-boxed used unit with no batteries, damaged front bezel retaining clips, and a defective rear USB port.
Product Notes
Eaton 5P 1550VA 1100W 1U Rackmount UPS Pure Sine Wave 5P1550GR
If a rackmount UPS that's ready to run is your priority, this Eaton unit is the more practical choice. It includes one lead acid battery, so you can install it in a 1U slot and connect your gear without hunting for a separate battery pack. The pure sine wave output and support for 200V-240V inputs make it a flexible fit for common single-phase setups. At $174.99, it costs less than the APC and also saves rack height. That said, this is a used unit with light scratching and scuffing on the chassis, and the seller could only confirm that it powers on-nothing more. Software, user guide, and accessory cables are not included, so budget for those separately. If you need a tested-to-power-on UPS with battery in a compact rack footprint, this is the one.
APC SRT3000RMXLA Smart-UPS SRT 3000VA Rackmount UPS (No Batteries)
If your rack already has a battery system or you plan to install new batteries, the APC SRT3000RMXLA gives you a high-capacity foundation for a reasonable price. With 3000VA and 2700W of output, it can handle a much heavier load than the Eaton in the same price neighborhood. The 2U form factor is taller but still rack-friendly, and the listing is described as compatible with a universal setup. However, this is not a plug-and-play unit: it comes with no batteries, the front bezel retaining clips are damaged, and the rear USB port is defective. The unit is pre-owned and re-boxed, graded C for cosmetic wear and possible dents or scratches. You'll need to factor in battery cost and some repair work, so it makes sense only if you already have a battery solution in place and can live with the defects.
Final Choice by Use Case
Choose the Eaton 5P1550GR when you want a single-rack-unit UPS with a battery included, pure sine wave output, and a lower up-front price. It's the safer pick for someone who needs a working unit right away and doesn't want to deal with missing parts.
Choose the APC SRT3000RMXLA when your load requires 3000VA or 2700W, you have batteries available, and you're comfortable working around cosmetic wear and a defective USB port. It's a capacity-first option for experienced users who can source batteries and don't need a pristine chassis.
