I have a solar system from Victron Energy, the main control unit is a Venus GX and all the units are linked together via VeDirect. I have a main battery is monitored by BMS712 and charged by MPPT 100/20 and MPPT 150/60. In parallel with this, I have a separate starting battery for an generator that I have an extra MPPT 100/20 connected to and controls the charging from a separate solar panel. The setup is also set up for this to be standalone, however it does not show the voltage of the actual starting battery it is connected to, but instead chooses to show the voltage of the main battery. It seems to me that this is because of DVCC. When I turn off DVCC, the correct voltage is displayed for the separate battery.
Is there any way to turn off DVCC for a single unit and at the same time monitor charging and voltage via VenusGX without deactivating the whole DVCC system?
No there isn’t.
A GX is designed for one battery system.
The simplest way is to disconnect the mppt from the GX and let it run itself with just a simple monitor from the start battery to keep an eye on it.
Maybe you can have the battery monitor set to none (i do not know have never tried it) but then the purpose of DVCC is removed.
Ok, thanks for your responce.
The reason for this request is that i need to monitor the starterbattery for the genset via ModBus TCP/MQTT. I have now disabled DVCC for the whole system and are now able to monitor the separate battery, but sadly as you say, i have no syncronized charge controll. Which is sad, because i really need DVCC for the main battery and the solar panels and charges connected to the main battery.
Beeing able to block one solar charger from the DVCC system would be high on my wish list.
I fail to understand your setup. Since all batteries are in parallel, their voltage should be the same. If they are not, there’s high currents and voltage drops somewhere.
Do you mean that the separate battery is often disconnected from the other one, and you need to have a different voltage measurement for it? If that’s the case, you should set up a separate GX device. You could also add a second SmartShunt and set that one as “DC Power”.
Hi,
The battery i want to exclude from DVCC is a eksternal Start battery for the diesel generator. This battery cannot be a part of the main system due to the design of the Sinus converter inside the generator. Therefor the starterbattery must have its own circut. But since the generator can be in standby for long periodes, i use a PV and a MPPT to charge the battery and keep it in good condition. I therefor want to monitor the starterbattery and be able to send a warning if there is low voltage on the starter battery. I am able to monitor the battery with DVCC disabled, but wish there was a posibility to exclude this MPPT charger for generator from the DVCC calculation via software. Without adding more devices. Below you can se a snip of a part of the system to better understand the system.
So, the starter battery is NOT in parallel with the rest of your system. That’s what you wrote on your first message. In this case, the only way I can think of doing what you have in mind without getting a second GX, would be monitor the started battery though VictronConnect, since VictronConnect always shows the actual battery voltage detected by the MPPT controller. Then, you could probably set up nodeRED on the GX device and try to find that same reading VictronConnect uses and act accordingly.