Choosing backup power for rackmount gear is really about what you want to protect and how many devices need to stay up when the grid dips. The Libert Vertiv PSI5-1500RT120 and the Eaton 5P1500R are both used rack UPS units, but they take different approaches. This comparison will help you decide which one fits your critical power setup.
Quick Verdict
If you want more raw headroom and cleaner output, the Libert Vertiv PSI5-1500RT120 is the stronger pick. If you want more flexibility for multiple devices, the Eaton 5P1500R is the better fit.
Comparison
| Feature | Libert Vertiv PSI5-1500RT120 | Eaton 5P1500R |
| Price | USD 149.99 | USD 239.90 |
| Rated capacity | 1500VA / 1350W | 1440VA / 1100W |
| Power bar | | |
| Output | Pure sine wave, AVR, LCD status display | Five 5-15R outputs, audible alarm, cold start, LED display |
| Form factor | Rackmount/Tower | 1U rackmount |
Where Each Product Wins
- The Libert Vertiv PSI5-1500RT120 is the better choice for heavier loads and gear that responds well to regulated sine wave power.
- The Eaton 5P1500R is the better choice when you need to plug in several devices and want the convenience of a cold start.
Product Notes
Libert Vertiv PSI5-1500RT120
At the heart of the Libert Vertiv PSI5-1500RT120 is a 1500VA/1350W rating that gives you plenty of capacity for a rack full of network gear. Pure sine wave output and automatic voltage regulation are the features that make it stand out for sensitive electronics. The LCD status display lets you see load and battery status without an external monitor. It was pulled from a working environment and comes as a single unit, so you're buying used hardware with a service history. The main limitation is that used unit caveat: you get one unit, and you should be prepared for some prior wear. If your main goal is clean, high-capacity backup power, this is a solid choice.
Eaton 5P1500R
The Eaton 5P1500R makes its case with five 5-15R outputs, so you can keep several devices connected directly. Cold start is a useful feature if you need to power up from battery when incoming AC is gone. An audible alarm and LED display round out the monitoring package. These units have been tested and hold a good charge, and a 30-day warranty is included. The visible scuffs and scratches from storage and regular use are the trade-off for buying used. The capacity is slightly lower than the Vertiv's, which matters if you're powering a high-draw rack. For multi-device flexibility, the Eaton is worth a close look.
Final Choice by Use Case
Go with the Libert Vertiv PSI5-1500RT120 at its lower listed price when you want more capacity for a heavier load. Choose the Eaton 5P1500R when you need the flexibility of extra outputs and cold start, even though its listed price is higher.
