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jimk1963's avatar
jimk1963
Virtuoso
Apr 13, 2026

SNMP shutdown of ReadyNAS 6.10.9 using CyberPower UPS not working

CyberPower rack-mount UPS CP1500PFCRM2U powering 4 ReadyNAS boxes (212, 314, 424, 528X).

 

All are Ethernet connected including UPS using RMCARD205 optional Ethernet Card. 

 

ReadyNAS are all connected to the UPS via SNMP like the example shown below.

 

When UPS is on battery, battery can drain all the way to 0% and NAS units never gracefully shut down.  Why?

 

Is a NUT server mandatory for this to work? 

 

My rack has a Home Assistant OS laptop, running Network UPS Tools integration. It can monitor the UPS over SNMP. 

 

 

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