Putty/plink script to use SSH to connect to my Sophos Home UTM to shutdown the UTM?

Question

I am working on a project to use Powershell, Putty and Plink (which are new to me), and CyberPower PowerPanel Business edition that would enable a local PC to monitor the CyberPower UPS battery level and to shutdown the Sophos Home UTM 9.407-3 when the UPS battery level reaches a critical threshold. 
 The only thing I'm not sure of is whether the Putty command to shutdown the UTM is correct, and that requires knowledge of Putty, Plink, and the Sophos UTM command line syntax. 
 The Powershell command is " plink.exe -ssh -batch loginuser@192.168.xxx.xxx -pw xxxxxxxx /sbin/shutdown -h now " , where xx's are the specific IP address of the UTM and the loginuser password. 
 Can anyone tell me if this is correct? If not, what would be the correct command? 
 Thank you

BAlfson · Accepted Answer

1. If the UTM PC is connected to a UPS, that should be enough "ballast" to prevent electrical damage to the PC. You idea of handling the battery by programming the UPS seem like a better approach than shutting down the PC. 
 2. Linux is a lot more robust than Windows. In the unlikely event that a file is damaged, the OS will repair the file before completing the boot process. 
 In fewer that one-in-a-thousand Up2Dates, something will go wrong, requiring a restore of the configuration from the backup made prior to the Up2Date. Sometimes that won't do it and another reboot solves the problem. Sometimes, that won't do it and the PostgreSQL databases have to be rebuilt, causing the loss of historical Reporting data and graphs. Sometimes, that doesn't do it and a complete re-image of the system is required, causing the loss of logs in addition to reporting and graph data. I've never heard of a UTM having problems because of a power outage. 
 Cheers - Bob