This article explains minimum privilege required to shutdown vSAN cluster.
VMware vSAN 7.x
VMware vSAN 8.x
To provide users with minimum privileges to shutdown vSAN cluster the below can be performed:
Create a role with the below privileges. In the Host section, select below privileges : (vSphere Client -> Menu -> Administration -> Access Control -> Role -> New)
Maintenance
Modify Cluster
Power
Assign the newly created role to the required user/user groups