Hello,
This is my first post here. I hope someone can help me with this.
In my motorhome (Mercedes Marco Polo, 2015) I have an AGM starter battery and a LifePo4 on-board battery (Wattstunde Lix 100-D LT).
A VCC 1212-30 charging converter and a D+ simulator (both Votronic) are also installed. The system is working perfectly so far.
Now I have two solar panels (= 2x 100W) mounted on the roof and a Victron Smart Solar MPPT 75/15 charge controller in the car.
My question is;
What is the best way to connect the charge controller to the system so that both batteries are charged?
I think there are two ways:
I can connect it directly to just my lithium battery, I think that will work without any problems. Because in the Votronic operating instructions I read: “Built-in on-board network filter: problem-free parallel operation with other charging sources (.., ..,.., solar systems) on one battery.
I will also ask Votronic whether the starter battery is also charged this way.
A second way to connect the charge controller to the system is using the wiring that comes from the outside socket. That's how I have it installed at the moment. But that doesn't work perfectly. I think the charge controller doesn’t reach floating mode. (I'll send a PDF with the settings in the app as they are now).
I don't know if it's even possible connecting it this way.
If that were to work, what values should I enter into the charge controller? The values that the lithium battery needs, or other values?
I really hope that you can help me, because even after a long search I still haven't found the answer.