Trial version of StruxureWare Data Center Expert appears to have 25 node license available.
StruxureWare Data Center Expert
AP94VMTRL any version.
The current default configuration of all StruxureWare Data Center Expert is that the system comes with a pre-installed 25 node license key. The Virtual Machine or VM version shows this same 25 node license key in the user interface however until activated, will only allow 5 nodes to be added to the system.
This is by design. It was done so APC did not need to add a 5 node key to just this one version. Once activated, the rest of the nodes can be used.