You can use the call command to execute any command on the remote server, that the SSH server allows you to execute, and that does not require a terminal emulation.

So yes, in general, it's possible to execute a PowerShell script.

Though note that WinSCP is not the right tool to automate command execution. The call command is just a handy feature, if you want to execute commands in addition to file transfers. If you want to automate commands only, you better use another tool, like PuTTY Plink.

Hello,
Does anyone know if you can use the call command to execute a powershell script a remote windows host?