Solar Charge Current Limit and Load Current

[billakisdrama]

Hello everyone and happy new year.
I have come across with the problem below.

I have a SmartSolar MPPT 150/70-Tr VE.Can and 3000W of solar connected on the Charge Controller.

My lead acid batteries have a maximum 50A of charging current, so i set the maximum charging current limit on the smartsolar at 50A.

I also have a MP-II 3000.

I observed that when i have a heavy load (2000-2500W for example) the battery voltage drops and the charger throttles at 50A even though no current goes to the batteries, or even worst the loads drain the battery.

Is there a way for the charger to understand that this current is not charging the battery but instead feeds the load, so that can harvest more solar power??

Thanks.

[pwfarnell]

For the MPPT to know the battery current it would need to have a shunt connected and I believe a GX device to enable transfer of the current by enabling DVCC (distributed voltage and current control) and SCS (share current sense). You then set the maximum charge current in the GX device and this controls the attached devices including the Multiplus as that will also be connected.

See the Cerbo GX manual DVCC section.

https://www.victronenergy.com/media/pg/Cerbo_GX/en/dvcc---distributed-voltage-and-current-control.html