Transfer the ZIP to the machine on which PowerCLI is to be installed.
Open Powershell on the target machine.
To determine the modules folder paths, run this:
The modules will have to be extracted in one of the folders from the output of the above command. Both user-based and machine-based installation is possible (e.g. C:\Windows\System32\WindowsPowerShell\v1.0\Modules).
Extract the contents of the ZIP file directly into the folder.
For Windows, run this command to unblock the files (they are considered foreign):