question

I'm thinking my system needs a tweak around these values as per:

https://www.victronenergy.com/live/doku.php?id=battery_compatibility%3Alg_chem_resu&do=export_pdf

Do you know if there a way of accessing the assistant via a com port without having to buy a Victron MK3 USB converter?

I have the same issue and i think you are right with your suggestions to what it causing this issue, i have commented on another thread: https://community.victronenergy.com/questions/2643/imposible-to-make-soc-lower-with-ess.html

As per the Victron Doc for LG Chem and Multiplus i have my Sustain Voltage set to 50V, however in the same doc it tells you not to change the Dynamic Cut-off values/curve, nor change the restart value. However i think it's these dynamic cut off values that are cutting in before the sustain voltage and or the SOC limit. Thus significant charge is being unused.

I have same set-up with Pylontech batteries except I selected Optimised (with battery life) and batteries are only charged by Solar.

I have same limit imposed on selected Minimum SOC (set at= 25%) by the system determined Active SOC limit.

Active SOC limit is lower when fully charged in day (55%) and higher when not fully charged (60 to 65%). This effectively ensures batteries charged, by Solar to 50 V at least once per day!

I suspect this will change when I add 3 Kw solar inverter - next week or when better weather!

Very clever algorithms for Self-Consumption - with battery life!