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glaukus avatar image
glaukus asked

VRM incorrect System Overview and Consumption data

I have recently put together a system consisting of two Multiplus 2 x120V types for power assist functions in an RV.

When reviewing the System Overview and Consumption data it seems like VRM is not accounting for 2 inverters powering the system essentially halfling the power consumption in the graph and reporting this as "To Battery" instead.

Having reviewed the Advanced graphs, the "To Battery" isn't correct as the batteries are 100% charged and in float for extended times. I also deleted the installation from VRM and re-added. I monitored the data while away from the RV to capture the details while minimal power was being consumed.

I have checked all settings and also confirmed the Cergo GX does see the two serial numbers of the inverters.

Unsure if I am missing something or if this is a bug of sort. Will try attach screenshots, but the board is not allowing file attachments at the moment.

vrm bug
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2 Answers
Dean Perry avatar image
Dean Perry answered ·

Are the inverters actually programmed to be a parallel set? Daisy chained via VE.Bus to the Cerbo?

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glaukus avatar image
glaukus answered ·

Here is a link to the other forum that allows attachments of pictures.

https://victron.discourse.group/t/vrm-incorrect-system-overview-and-consumption-data/941

To answer your question, yes the inverters are setup in parallel (master + slave) and operating normally. The Shore/Grid input comes only from L1 (limited to 24 amps) and output is handled by the inverters with both L1 and L2 offering 120v. The inverters split the L1 feed to both output legs and power assist as needed on both legs depending on the RVs demand.


All of the above is working 100% correctly from a operational standpoint. The issue I see is only with the VRM and how it is interpreting the data it is receiving from the Cerbo GX.

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