Quick Take
Choosing a rackmount UPS for critical power usually means weighing condition against capacity against listed price. These four units span a wide range: from a 1500VA used unit at $149.99 to a 1500VA open-box new unit at $420.00, with a new 2000VA unit and a used 3000VA unit in between. The big decision is whether you want a ready-to-run unit, a new unit with a warranty, or a high-capacity unit that needs batteries.
Listed Price Comparison
| Product | Listed Price | Relative Price | Condition | Capacity | Key Detail |
|---|---|---|---|---|---|
| W Box Technologies OE-RCKMT1500 | USD 420.00 | New - Open box | 1500VA / 1050W | 8 outlets, LCD, AVR | |
| CyberPower CP2000PFCRM2U | USD 379.00 | New | 2000VA / 1200W | 3-year warranty | |
| APC SRT3000RMXLA | USD 214.34 | Used | 3000VA / 2700W | No batteries, cosmetic wear | |
| Libert Vertiv PSI5-1500RT120 | USD 149.99 | Used | 1500VA / 1350W | Tested, pure sine wave, AVR |
Decision Matrix
| Your Priority | Recommended Pick | Why |
|---|---|---|
| Highest wattage | APC SRT3000RMXLA | No batteries included |
| Active PFC compatibility | CyberPower CP2000PFCRM2U | PFC sine wave output |
| Open-box purchase | W Box Technologies OE-RCKMT1500 | Unused, packaging opened |
| Lowest listed price | Libert Vertiv PSI5-1500RT120 | Tested used unit |
Product Notes
#### W Box Technologies OE-RCKMT1500 1500VA/1050W Rackmount UPS - Open Box New

The W Box Technologies OE-RCKMT1500 sits at the top of the listed price range, but it is the only unit listed as New - Open box. The packaging was opened to verify the contents, while the unit itself is described as unused and includes the original accessories such as rackmount ears. It provides 1500VA / 1050W in a 2U rackmount or tower convertible format, with line-interactive AVR, eight outlets with battery backup and surge protection, an LCD display, and pure sine wave output. The main limitation is the price: at the high end of this group, it is the most expensive option listed.
#### CyberPower CP2000PFCRM2U Rackmount UPS 2000VA 8-Outlets AVR Surge Protection

The CyberPower CP2000PFCRM2U includes a 3-year manufacturer warranty and uses PFC sine wave output, making it a match for equipment with active PFC power supplies, plus automatic voltage regulation and surge protection. The color LCD provides real-time status, there is an audible alarm, and an optional Remote Network Management Card or Cloud Monitoring Card can add remote monitoring. Its 2000VA / 1200W rating sits between the 1500VA models and the 3000VA APC. The limitation: at $379, the listed price is not far from the open-box unit at $420, and you do not get the sheer wattage of the APC.
#### Libert Vertiv PSI5-1500RT120 1500VA/1350W Rackmount UPS Battery Backup Qty 1

The Libert Vertiv PSI5-1500RT120 is the lowest listed price in this group. It is a used commercial-grade unit pulled from a working environment, and it powers on, shows a fully functional LCD, passes the built-in self-test, charges batteries normally, and displays no replace-battery messages. It delivers 1500VA / 1350W in a rackmount/tower format with pure sine wave output and automatic voltage regulation. The limitation is the used condition: a tested used unit is not the same as a factory-new unit, and it was removed from service during an equipment refresh.
#### APC SRT3000RMXLA Smart-UPS SRT 3000VA Rackmount UPS (No Batteries)

The APC SRT3000RMXLA offers the highest capacity in this group at 3000VA / 2700W, but it arrives without batteries. It is a pre-owned, re-boxed unit removed from a working environment, and it shows cosmetic wear, damaged front bezel retaining clips, and a defective rear USB port. For $214.34, you get a 2U rackmount Smart-UPS with the most wattage here. The limitation is that you must supply compatible batteries, and the defective rear USB port removes rear USB connectivity.
Final Recommendation by Use Case
- If you need the most wattage and can supply batteries: choose the APC SRT3000RMXLA, but expect a used unit with no batteries and some cosmetic wear.
- If you want a new unit: choose the CyberPower CP2000PFCRM2U for a fully New listing with a 3-year manufacturer warranty.
- If you prefer an unused unit with original accessories: choose the W Box Technologies OE-RCKMT1500.
- If you want the lowest listed price: choose the Libert Vertiv PSI5-1500RT120 for a tested used rackmount/tower UPS.