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Has DC system - how to setup alt chargers

I have a Cerbo GX, 24v system, Quattro 8000 with a SmartShunt for the 24v. I also have a 12v system with a bmv that is powered using 2 Orion 24-12 TR chargers. The 24v side is also charged using a 12-24v Orion TR when the alternator is running. How do I show the correct voltage and amperage in the GX for both the 24v battery and the DC display?

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You cannot display two BMVs on the main UI of one Venus device (Cerbo GX, Venus GX, CCGX).

You can hook up a second BMV and see the data in the Venus menus, though, if that would work.

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I read that. I'm just trying to figure out how to get the DC reading to reflect correctly.

What does "reflect correctly" mean to you?

Did you try plugging both BMVs in? You'll simply see two of them in the menu of connected devices. You can click into either of them and look at their detailed values.

Maybe I don't understand what the DC main display means. I want the DC to reflect the 12v DC devices, the 24v to 12v Orion chargers and the 12-24v alternator charger. Basically all the 12v side combined plus and nagative amp/watts.

Where it says DC power

The "DC Power" box, if turned on, is just an accounting true-up calculated by Venus.

In a nutshell, it calculates that box as roughly

Shore In - AC Loads Out + DC In + PV In

Shore In and AC Loads are calculated using current estimators inside the inverter. DC In is measured using the BMV on your 24V battery. PV In is measured inside the solar charge controller.

The system assumes that any excess power not accounted for in the above is being sent to other DC loads.

That's only right, of course, to a limit. Any losses are also attributed to "DC power" in that true-up. The current sensors themselves have accuracy error. And the numbers will almost never add up perfectly, because the code that does the accounting true-up doesn't run at the exact moments that some of the other values are posted and displayed.

I don't have a picture of your whole circuit to reference here, but I think it's possible that you can infer some of what you'd like to see from the built-in metrics. But probably not all of those values.

Ok gotcha. Sounds like u r a dev for victron. An idea to allow Venus to scale better. Allow each BMV connected to represent another DC load. I have no problem buying multiple shunts so that I can represent my battery banks. This would be a win/win since I get decide what is important and you guys just sell more shunts. Any idea of companies that customize Venus? I like to learn but I'm a c# developer and don't have much time to devote to this.

I'm not a dev for Victron, just an end user who occasionally tinkers. :)

The idea is good -- more modularity and flexibility in the UI would be pretty nice. It gets complicated quickly, though, because with multiple shunts you soon devolve into needing to write custom logic to add/subtract/combine various values. Each system could have its own unique things like that. I think the feature as you've laid it out is pretty substantial.

For third-party help, you could post your needs in the Modifications space and see if anyone there might bite on a custom project.

If you're interested in an off-Cerbo visualization, I might be able to help you get started there. (I do it this way, because the built-in UI is too limited.)

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