Choosing a UPS for critical power is a balancing act: you need enough VA and wattage to cover your connected gear, a form factor that fits where you will put it, and a battery chemistry and condition you can live with. Add a wide price spread-from USD 121.50 to USD 420.00 in this group-and the decision quickly comes down to trade-offs. This comparison walks through four UPS options with different strengths, from a 1500VA used rack unit to a 1000VA LiFePO4 desktop model.
Quick take
In this group, you'll find a used 1500VA rack/tower UPS with pure sine wave output, a compact open-box LiFePO4 unit, a new-open-box 2U rackmount with eight outlets, and a used 1U Eaton with five outputs.
Listed-price comparison
The table below shows the listed price for each unit. The bars give a quick visual sense of the price spread.
| Product | Listed Price | Price Bar |
|---|---|---|
| Libert Vertiv PSI5-1500RT120 1500VA/1350W Rackmount UPS | USD 149.99 | |
| Goldenmate 1000VA 600W LiFePO4 Battery Backup UPS | USD 121.50 | |
| W Box Technologies OE-RCKMT1500 1500VA/1050W Rackmount UPS | USD 420.00 | |
| Eaton 5P1500R 5P 1U 120V Rack UPS Battery Back Up 1440 VA 1100W 5 Outputs | USD 239.90 |
Decision guide
- For pure sine wave rackmount output with a moderate listed price, the Libert Vertiv PSI5-1500RT120.
- For a compact LiFePO4 desktop unit with universal compatibility, the Goldenmate 1000VA 600W.
- For a new-open-box 2U rackmount with eight surge and battery outlets, the W Box Technologies OE-RCKMT1500.
- For a used 1U rack UPS with five outputs and a 1440VA/1100W rating, the Eaton 5P1500R.
Product notes
Libert Vertiv PSI5-1500RT120 1500VA/1350W Rackmount UPS
The Libert Vertiv PSI5-1500RT120 delivers a 1500VA/1350W capacity with pure sine wave output and automatic voltage regulation, plus an LCD status display. It can work as a rackmount or tower unit, which gives placement flexibility. The listed condition is Used, and the unit was pulled from a working environment during an equipment refresh. That's the main trade-off: for a critical-power deployment where every component needs a known history, a used unit is less predictable. For a secondary rack or a staged spare at this capacity level, the spec sheet is exactly what you want.
Goldenmate 1000VA 600W LiFePO4 Battery Backup UPS
The Goldenmate 1000VA 600W uses a LiFePO4 battery core, which the product describes as lighter and with lower self-discharge than traditional lead-acid designs. It outputs pure sine wave and includes surge protection, built for routers, modems, and security cameras. The listed condition is Open box. This is the smallest capacity here at 1000VA/600W, so it won't power a server rack. Instead, it's a fit for keeping a home office or a network stack online during outages, especially if battery chemistry longevity is more important than raw output.
W Box Technologies OE-RCKMT1500 1500VA/1050W Rackmount UPS - Open Box New
The W Box Technologies OE-RCKMT1500 is listed as new and unused with the original packaging opened, and it includes rackmount ears. It provides 1500VA/1050W in a 2U rackmount or tower convertible form, with eight surge-and-battery-backed outlets, pure sine wave output, line-interactive AVR, and an integrated LCD display. The listed price is the highest in this group. If you need a clean-condition rackmount UPS with enough outlets to cover multiple devices, this unit is worth shortlisting. The downside is the higher listed price and the 2U height, which takes up more rack space than the 1U Eaton.
Eaton 5P1500R 5P 1U 120V Rack UPS Battery Back Up 1440 VA 1100W 5 Outputs
The Eaton 5P1500R is listed as a used 1U rack UPS with 1440VA/1100W capacity, 120V input, and five 5-15R outputs. It includes features like an audible alarm, cold start, and LED display, and it has scuffs and scratches from storage and regular use. Its 1U height makes it a tight fit for a server rack, and at 1440VA/1100W it sits right between the lower-capacity Goldenmate and the larger W Box unit. If a used unit doesn't bother you and you need a compact rack UPS with five outlets, this is a functional middle ground.
Final recommendation
If your priority is the lowest listed price and LiFePO4 chemistry, go with the Goldenmate. If you need a rackmount unit with a lot of capacity and a new-open-box condition, the W Box Technologies OE-RCKMT1500 is the one to choose, provided the listed price fits. The Libert Vertiv and Eaton options are used units that offer solid specs at lower price points, but they require you to be comfortable with their used condition.
