Choosing between two rack-mountable backup power units for critical power protection usually comes down to a single tension: a clean, modern power source versus raw capacity. The APC Smart-UPS Lithium-Ion 500VA is a brand-new silver 1U unit with a modern battery pack. The Eaton 5P1500R is a used black 1U rack UPS that offers substantially more power output. Which one should you actually put in your rack? This guide breaks down the two side by side so you can decide with confidence.
Quick Verdict
If you need to protect a heavier load or connect more equipment, the Eaton 5P1500R is the more capable unit. If you want a factory-fresh UPS for lighter gear, the APC Smart-UPS is the better match. The Eaton sells for a lower absolute price but shows signs of wear; the APC costs more but comes new in box.
Comparison Table
| Feature | APC Smart-UPS SCL500RM1U | Eaton 5P1500R |
| Price | USD 399.00 | USD 239.90 |
| Price indicator | | |
| Condition | New | Used |
| Power rating | 500 VA | 1440 VA / 1100W |
| Outputs | - | 5 |
| Battery type | Lithium-Ion | - |
| Key extras | Silver 1U chassis | LED display, audible alarm, cold start |
Key Considerations
Condition. The APC arrives brand new, which means no wear and tear. The Eaton is used and will show scuffs and scratches from storage and prior use. That's a main reason the prices are where they are.
Battery chemistry. The APC is built around a modern battery pack, while the Eaton does not specify its battery type. If a modern battery is a requirement, the APC is the one that delivers it.
Power envelope. The Eaton offers a dramatically larger power envelope than the APC. For a heavily loaded rack, that difference can be decisive.
Where Each Product Wins
APC Smart-UPS: The APC makes sense if a brand-new, compact unit is more important than raw capacity. It's the better fit for low-draw devices where condition matters.
Eaton 5P1500R: The Eaton makes sense if you need more headroom for connected equipment, a lower absolute price, and you're willing to accept visible wear.
Product Notes
APC Smart-UPS SCL500RM1U
Brand-new and ready to install, the APC Smart-UPS SCL500RM1U pairs a compact silver 1U chassis with a lithium-ion battery. This is a meaningful advantage if you want a sealed, modern battery type without the maintenance concerns of older chemistries. For a single server, switch, or network appliance, the APC delivers a practical backup window. The main limitation is the cost: it's the more expensive unit here, and the modest capacity won't cover a high-draw rack. If your load is small and you value a fresh, clean unit, the APC is an easy choice.
Eaton 5P1500R
The Eaton 5P1500R is a used rack UPS that delivers serious backup power for less than the APC. It handles a far larger load, which makes it the pick if you have multiple devices or a high-wattage server. It also includes an LED display, audible alarm, and cold-start functionality, all of which are practical in a rack. The catch is the physical condition: this unit shows scuffs and scratches from storage and prior use, and the warranty is limited to 30 days. If you can look past the cosmetic wear and want a lot of capacity at the lower end of the price range, the Eaton makes sense.
Final Choice by Use Case
Choose the APC Smart-UPS if you need a new, compact backup unit for light equipment and you prefer a clean, factory-fresh item. Choose the Eaton 5P1500R if you need substantial backup power and a lower price, and you're comfortable with a used unit that shows its age.
