Hello Rob,
Welcome to the Vera Community. Battery operated devices cannot be polled on-demand as most of them are always in sleep mode and only wake up when they are triggered by an event like a “trip” command, or woken up by the onboard button. The poll command only works on hardwired devices, like switches.
If you haven’t stumbled upon this thread yet, I advise having a look at it:
https://community.getvera.com/t/zwave-network-on-vera-explained/210661