Hi David,
Have you found an answer to this question yet? I have the same issue, even when I have EVC enabled.
UPDATE: I figured it out. You need to specify " | Get-View" and not just "Get-VMHost", like so:
$vmHost = Get-VMHost "Host-Name-Here.example.com" | Get-View
$vmHost.Summary.CurrentEVCModeKey
$vmHost.Summary.MaxEVCModeKey
It also works for clusters:
$cluster = Get-Cluster "Cluster Name" | Get-View
$cluster.Summary.CurrentEVCModeKey
Message was edited by: jdmueller