Returns the Windows Server name of active node of a SQL Cluster.
If -Detailed is specified, details including node name, status, status description, and current owner (basically, everything in sys.dm_os_cluster_nodes) are also returned if the cluster is SQL Server 2012 and above. Older SQL Server versions will only display the node names.
To return the Windows Server (ComputerNamePhysicalNetBIOS) name of the current owner
Get-DbaClusterActiveNode -SqlServer sqlcluster
To show additional deals such as status, and all nodes in the cluster
Get-DbaClusterActiveNode -SqlServer sqlcluster -Detailed
This has only been tested on a 2-node cluster but has been written to support clusters with additional nodes. Please let us know your experience.