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 while away from the RV to capture the data while minimal power was being consumed.
Here are some screenshots of the System Overview, Consumption, Share/Grid as well as Advanced graphs. The Consumption more of less haft what it should be considering the batteries are fully charged. The system is then reporting this “extra” as To Battery" under the Shore view. Advanced graphs show the amps usage of the batteries as well as the state being in Float the entire time.
Your intention for “put together” is a parallel configuration to double the currents or a 2 phase 180 deg configuration to double the AC voltage?
Did you setup the connected devices using the Victron (Quick) Bus configuration utitlity?
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.
I’m seeing the same issue with the VRM portal, the reported load is cut in about half when using 2 multiplus’s setup in parallel- is there a setting that fixes the somewhere is the eco system?
I spent a lot of time troubleshooting this and unfortunately everything points to a software bug of sorts likely on the cloud service and how they are interpreting the data received.
I was going to explore contacting Victron but the RV has been winterized now and will have to resume this in the spring.
Resurrecting this thread because I am having this exact same problem with the VRM portal. It shows that half of the energy coming from the grid is being used to charge my batteries and the other half is being consumed by my AC critical loads, but in reality all of that power is being consumed and none is going to the battery. This throws my consumption numbers way off and makes it a bit difficult to plan for system upgrades.
My loads are only on the critical loads output, I am not backfeeding into the grid, and my loads are quite stable (around 650W continuous from some server gear). Only the VRM portal dashboard shows this discrepancy and under advanced all of the graphs look how they should.
My system is: Cerbo GX, 1x Multiplus ii 2x120 24v, SmartShunt 500A, SmartSolar MPPT VE.Can 250/70 rev2, and 280Ah of non communication connected batteries.
Based on some of the information that @glaukus has given, one of the things we have in common is the 2x 120v Multiplus inverters. I am wondering if there is a bug with how they are reporting their consumption?
I enabled forecasts on the VRM portal and what’s odd is the predicted consumption values are correct, but the reported consumption values are half of what they are suppose to be. Has anyone else had this bug happen to them?
