shutdown your esxi host using powercli

if you want to shutdown a host using powercli:

Set-VMhost -VMhost HOSTNAME -State Maintenance

get-vmhost HOSTNAME | Foreach {Get-View $_.ID} | Foreach {$_.ShutdownHost_Task($TRUE)}

 

 

here is a  way to shutdown all the hosts in your vcenter:

#Shut down the host

$currentesxhost = get-vmhost $esxhost

 Set-VMhost -VMhost $currentesxHost -State Maintenance

 Sleep 55

 $currentesxhost | Foreach {Get-View $_.ID} | Foreach {$_.ShutdownHost_Task($TRUE)}