"The 160kW Symmetra PX units use Power Modules which are 16kW PMs while the original Symmetra PX Power Modules are 10kW PMs. The 16kW Power Modules can be used in an older frame.
Once the 16kW Power Module is installed in the older frame it recognizes this and it operates as a 10kW Power Module.
SYPM10KH = 400v 10kW Power Module
SYPM10K16H = 400v 16/10kW Power Module