Should a WS-C3750E-48PD-SF switch have results under POE Report under RME 4.3.1 > Report Generator > Inventory?
When I run that report against that type of switch, I get the following result:
INVREP0104: None of the selected device(s) are POE capable / enabled. Select POE supported devices to generate the report. Please refer the Online help for more information.
This is a known bug, CSCsx15486. Unfortunately, at this time, only the following device types are recognized as PoE capable:
WS-C3560-24PS - 220.127.116.11.18.104.22.168.563
WS-C3560-48PS - 22.214.171.124.126.96.36.199.564
WS-C3560G-24PS - 188.8.131.52.184.108.40.206.614
WS-C3560G-48PS - 220.127.116.11.18.104.22.168.616
WS-C3750E-24PD - 22.214.171.124.126.96.36.199.792
WS-C3750E-48PD - 188.8.131.52.184.108.40.206.791
WS-C3560E-24PD - 220.127.116.11.18.104.22.168.795
WS-C3560E-48PD - 22.214.171.124.126.96.36.199.796
If your 3750 is a WS-C3750E-48PD, you can try setting the sysObjectID from the stack OID to the device-specific OID using the command:
no snmp-server sysobjectid type stack-oid
Then reboot the switch, delete it from DCR, and re-add it. Then it should show up in the PoE report.
That said, EnergyWise is different from PoE. While RME may not see the switch as a PoE switch, the new EnergyWise features of RME 4.3.1 should still work. Try running the EnergyWise readiness assessment report to see if this switch is compliant, or if it requires an upgrade.