Shelly Uni

I have a C8 and would like to integrate the volt meter function from Shelly Uni peripheral dc voltage monitoring feature so I can monitor my House batteries in a motorhome. I downloaded the Shelly helper app but I can’t seem to get the hub to bring in the data…I also tried to link it to Alexa thinking I can pull in the data that way but no luck there either….anyone out have any luck with how to pull in the volt meter data from the Shelly Uni? Your help would be greatly appreciated.