Powershell access for non-admin roles?

Hi. I can't find any information regarding this, but to what roles is PowerShell access to VMM restricted?

I have a selfservice user (member of a created role that is of type "Self-Service user") that is assigned some VMs in a cloud. This user can access his VMs via VMM console just fine, but we need him to be able to also use VMM PowerShell cmdlets against his VMs.

When I try to access VMM (for example using Get-SCVMMServer or Get-SCVirtualMachine cmdlets), I get an access denied error (ID 1604).

Is access via PSH restricted to the "Administrator" profile type? If so, can this be altered?