Quick Verdict
Choosing between these two used Eaton 5P UPS units for critical power comes down to the power requirements of your rack, how many devices need backup, and how much you want to spend. Both deliver 1100W of output, so total capacity alone won't separate them. The 5P1550GR is the lower-priced of the pair, while the 5P1500R carries a $64.91 higher price. Both are used units, so physical condition and included accessories deserve attention. If the comparison table below matches your power and outlet needs, that should settle the decision; otherwise, this guide walks through the practical differences.
Comparison Table
| Model | Listed Price | Price Bar | Key Specs |
|---|---|---|---|
| Eaton 5P1550GR | USD 174.99 | 1U rackmount, 1550VA / 1100W, 200-240V, C14 inlet | |
| Eaton 5P1500R | USD 239.90 | 1U rack UPS, 1440VA / 1100W, 120V, 5 outputs, 1 fan |
Where Each Product Wins
Eaton 5P1550GR wins for setups that need sine wave output and a more economical price point. The 200-240V input range makes it a good fit for racks with higher input voltage.
Eaton 5P1500R wins where a 120V rack with multiple receptacles is the requirement. It also includes a cooling fan, audible alarm, LED display, and cold start, so you can monitor and restart from the front panel.
Both listings are used, so the practical takeaway is to factor in the cosmetic wear and missing accessories before deciding. The 5P1550GR asks you to supply some basics, while the 5P1500R backs its used condition with a 30-day warranty. That difference can matter as much as the power and outlet specs.
Product Notes
Eaton 5P1550GR
The clearest reason to choose this unit is its pure sine wave output. For a used rack UPS at the lower end of this price spread, that's a meaningful feature if your gear is sensitive to power waveform. The physical condition is honest: light scratching and scuffing on the chassis. The listing also notes that software, a user guide, and accessory cables are not included, so you'll need to source those separately. You do get the UPS plus one lead-acid battery, and the listing says it powers on, though further testing was not performed. If you can supply your own cabling and already operate on a compatible voltage feed, this is the more economical pick.
Eaton 5P1500R
This unit makes the most sense when you want more visibility and control from the UPS front panel. It includes an audible alarm, an LED display, and cold start capability, plus a cooling fan to keep things ventilated in a rack. The used chassis has some scuffs and scratches from storage and regular use, but the listing says it holds a good charge and includes a 30-day warranty. The higher listed price is the main hesitation, yet the extra conveniences fill that gap. In practice, that front-panel feedback is useful when the rack is in a corner and you don't want to spend extra time checking each device. If a straightforward backup source with visible status is the goal, this is the model designed for it.
Final Choice by Use Case
- Pick the Eaton 5P1550GR when the lower price and compact 1U form factor matter most.
- Pick the Eaton 5P1500R when you want a rack UPS with more front-panel conveniences.
