I’ve recently installed three 400W panels each connected to their own 100/30 MPPT. Originally they would reach the set absorption voltage however, over time absorption is coming on earlier and earlier and therefore never reaching 100% SOC.
I’ve noticed a reset fixes this but again over time this fades.
The MPPT charge controls are connected through the lynx distribution to 2 Epoch 460AH LiFePO4.
I have absorption set to 14.4V and the BMV-712 shunt has a charged voltage of 14.2V.
Looking at the trend (I’ll try attach a screen shot) the charge controllers will go into absorption or float before even reaching 14.2V. The voltage reading from the batteries is the same as the shunt/MPPTs, I don’t suspect voltage drop.
What could be causing this?
