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woz001 avatar image
woz001 asked

Adding Phoenix AC load to VRM overview (all on Cerbo GX)

I have probably a bit tricky question...

I am using a Multiplus-II 48/5000 three-phase system with a MPPT 450/200, ~10kWp PV and 52kWh Pylontech battery rack - all connected with Lynx Distributors. It runs as island system with AC ignore, so the grid only takes over at higher loads or low battery (thanks to some previous question I got answered and experimenting prior with a small Multiplus 24/600 - also as recommended by Victron). Everything works as required/expected - and I can only recommend to work like this to get used to all the features of a Victron system.

Ok, now to my new problem:

I've got an older Phoenix Inverter 48/5000 I would like to use as switchable supply for additional heating/cooling the house, in case I have excess PV power. I am aware (as I found in this forum) that I couldn't connect that one to the same VE.bus to the Cerbo, so I connected it with an additional MK2 VE-Bus/USB adapter - so far, so good. I also checked this first with my small "playground" setup. I might want to use Node-RED with the large Cerbo firmware in future, but for now I want to get it working in some standard configuration.

This looks OK so far. Even when batteries are charged and I add load to the Phoenix, it starts discharging the battery first and a bit later the battery commands to charge again. At this point, the MPPT starts charging and is supplying the inverter with its load as well. So it is somehow "indirectly" recognised in this setup.

The only issue I see is that I don't see this additional AC load directly in the Cerbo main screen and thus also not in the VRM portal. I just see that the MPPT and/or battery delivers more power. That's a bit suboptimal... Interestingly, in the "installation data" graph on the VRM dashboard I can see the energy consumption of this additonal inverter. So it is not ignored. I just can't see the actual AC load of it in the graphical overview.

Is there a way to "hack" the system that I can "see" this actual AC load in the overview? I don't expect it is possible to add an additional "L4" phase or so, but maybe I can add this load e.g. to one of the L1...L3 phases somehow?

Thanks a lot in advance for any suggestion!

Multiplus-IIcerbo gxPhoenix Inverter
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woz001 avatar image woz001 commented ·
At least I have just found one solution: I can activate visibility of the Phoenix Inverter in the "Battery Management" menu of my Cerbo, then I get an infobox on the VRM webpage where I can see the DC power of the device...
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