Hi there,
I have a 3xMP2-48-5000 setup with multiple Victron MPPTs as well as a BMS/can powered battery.
ESS and DVCC is enabled.
Battery tells via BMS to Victron, that it requires 55,2V. And MPPTs output voltage is set to 55,2V (I can see this via Victron Connect).
Problem is: I have around 100mV loss between MPPTs and battery. I'm already using the thickest possible cables. Cables are as short as possible.
This causes a bit of a problem charging the battery up to 100% respectively it's 280Ah.
It's charging easily to 99%, but then it struggles... I'm pretty sure this is due to the fact, that MPPT produces 55,2V and battery receives only around 55,1V and therefore not getting full.
I can of course reconfigure the BMS to request 55,3V instead of 55,2V... But then MPPTs will produce 55,3V, battery still receives 100mV less, means 55,2V and required 55,3V... So still the same issue.
As MPPTs are controlled by the BMS: How can I compensate the 100mV? Or is there a thing I was not thinking of?
br,
Alex
p.s. This is a "DC coupled PV, feed in excess" setup. Once I enable "SVS" in DVCC and battery is 99..100%, feed in to grid stops :-(