Quick verdict
Two APC Smart-UPS rack units, two very different trade-offs. The SRT3000RMXLA is a 2U rackmount chassis that offers far more capacity, but it carries known defects including a damaged front bezel retainer, a defective rear USB port, and cosmetic wear. The SCL500RM1U is a silver rack-mountable UPS, but its power rating is much smaller. If your rack has heavy power demands, the SRT is the capacity play. If you want a complete unit for lighter loads, the SCL is the more direct choice.
APC rack UPS comparison at a glance
The two units sit at opposite ends of the price spectrum: USD 203.62 for the SRT3000RMXLA and USD 399.00 for the SCL500RM1U.
| Detail | APC SRT3000RMXLA | APC SCL500RM1U |
|---|---|---|
| Listed price | USD 203.62 | USD 399.00 |
| Condition | Used, re-boxed | New |
| Capacity | 3000VA / 2700W | 500VA |
| Battery | Not included | Lithium-ion |
| Form factor | Rackmount 2U | Rack mountable |
Where each product wins
APC SRT3000RMXLA Smart-UPS SRT 3000VA Rackmount UPS (No Batteries) - This chassis is the stronger choice on raw capacity. It's built for serious equipment loads with a 2U rackmount design, and its power rating is six times that of the SCL500RM1U. It's also the right option if you can accept cosmetic wear plus the noted defects. The known issues - damaged front bezel retaining clips and a defective rear USB port - are real trade-offs, but this is the only one of the two that can handle heavy critical power.
APC Smart-UPS Lithium-Ion 500VA 120V Rack Mountable UPS SCL500RM1U BRAND NEW - The SCL wins on readiness and condition. It's a new unit, a direct contrast to the used, re-boxed SRT. For a lighter load - computers, servers, and networking equipment - it offers enough capacity in a rack-mountable form. The trade-off is capacity: if your load is substantial, the SRT's headroom is the decisive difference.
Product notes
APC SRT3000RMXLA Smart-UPS SRT 3000VA Rackmount UPS (No Batteries)
The APC SRT3000RMXLA is listed at USD 203.62, which positions it as the lower-priced option while offering the highest capacity in this comparison: 3000VA / 2700W in a 2U rackmount chassis. The unit is used and re-boxed, removed from a working environment at the end of a lease, and does not include batteries. It has damaged front bezel retaining clips, a defective rear USB port, and cosmetic wear including case dents and scratches. For someone building a high-capacity UPS solution who already has batteries or can source them, this chassis delivers a leading power rating. The trade-off is that you're taking on a used unit with documented defects, so you'll need to plan around the missing batteries and the known faults.
APC Smart-UPS Lithium-Ion 500VA 120V Rack Mountable UPS SCL500RM1U BRAND NEW
The APC Smart-UPS Lithium-Ion 500VA 120V Rack Mountable UPS SCL500RM1U is listed at USD 399.00. That's a higher upfront figure than the SRT, and what it buys is a new unit with a lithium-ion battery included. The 500VA rating keeps it suited to computers, servers, and networking equipment with modest power needs. The silver rack-mountable design lets it mount alongside other rack gear. The lithium-ion battery is the key difference here: it's built into the product, so you don't need to track down a separate battery for it. The limitation is capacity - if your load climbs well past 500VA, this unit won't cover it, which is where the SRT's capacity makes the difference.
Final choice by use case
If you're protecting a rack with substantial power draw and you're willing to accept a used unit's flaws, the SRT3000RMXLA is the capacity-focused pick. If you need a new UPS for a modest load, the SCL500RM1U is the more practical choice. The decision comes down to whether high capacity in a used chassis beats a new unit with a smaller rating.
