There are some different feature between Smart UPS On-Line SURT and SRT.
You may refer to the generation comparison as below.
Feature | Smart UPS RT (SURT) | Smart UPS SRT |
Double Conversion On-Line Topology | X | X |
Rack Tower Convertible | X | X |
Smart Slot | X | X |
+/- 1% Output Voltage Regulation | X | X |
Automatic Bypass | X | X |
Hot Swap User Replaceable Batteries | X | X |
Dual Input SURT : 15kVA & 10kVA 230V only SRT: 8kVA & 10kVA 230V only | X | X |
Auto Detect External Battery Packs | X | |
Predictive Replacement Battery Date | X | |
Multi color Graphical LCD | X | |
Unity Output Power Factor (6kVA-10kVA Models) | X | |
Start Without Battery | X | |
Energy Star (208 models) and Green Mode | X | |
Switched Outlet Groups | X |