Issue:
What is the maximum number of Battery Modules supported by the number of Power Modules installed in a Smart-UPS Modular Ultra?
Product Line:
APC Smart-UPS Modular Ultra 5-20kW
Environment:
All models and serial numbers
Resolution:
An APC Smart-UPS Modular Ultra 5-20kW (UPS Frame) is capable of handling external battery frames (XR Frames) with additional BMs (Battery Modules). However, the number of battery modules it can support is limited by the number of PMs (Power Modules) present in the system.
If the maximum number of battery modules is exceeded, the power modules will not be able to supply enough power under all conditions to properly charge the battery modules.
There are 6 slots in the UPS frame and the maximum number of battery modules in the UPS frame is 6 minus the number of power modules installed.
Please refer to the table below for more information.
| No of PMs | Max BMs Supported | Max BMs in UPS Frame | Max BMs in XR Frames | No of slots in XR Frames | Max supported XR Frames |
| 1 | 13 | 5 | 8 | 4 | 2 |
| 2 | 20 | 4 | 16 | 4 | 4 |
| 3 | 27 | 3 | 24 | 4 | 6 |
| 4 | 26 | 2 | 24 | 4 | 6 |
| 5 | 25 | 1 | 24 | 4 | 6 |
Should you have further concerns, please contact us at https://www.apc.com/us/en/support/
