I have tried seemingly everything but am obviously missing something.
I have a multiplus ii, cerbo gx and a 150/35 mppt.
The SOC drops by about 0.5V/hour until the alternator is connected.
I have followed all the lithium battery manufacturers suggestions and set the mppt voltage 0.03V above the multi voltage.
The system is going into float every dayand the current falls right off at that point so it's clear that the battery is charged.
There is 1 x 4000Wh lithium self managed battery and 6 x 400W solar so it's more than enough.
Can someone please assist