[Observium] Eltek Compact Shelf Discovery

I've got a number of Eltek compact shelves (-48 VDC) power systems that are failing to discover.

I get a bunch of these in the discovery debug.

STDERR[ Error in packet Reason: (noSuchName) There is no such variable name in this MIB. Failed object: NSCRTV-ROOT::commonDeviceVendorInfo.1 ]

It's able to pull the Sys Description and uptime. Am I missing a MIB?

Thanks

Jay