There seem to be a bug in the ESS software. I have posted a question with 2 replies with the same issue and no possible work-arounds or changes I can make. Stumbled across a similar post from 2021.
OS Ver 3.01
ESS enabled
Grid feed-back disabled
ESS modes does not affect the outcome as I have tried all
As soon as the current SOC fall below minimum SOC limit, the mppt throttles down to only max charge current, and source the active loads from the grid. If the SOC limit is manually lowered to below current SOC the MPPT throttles up to max or to match current loads as well as the max charge current.
I only noticed it lately as my electricity meter was changed to prepaid and grid feed-back had to be disabled.
This is quite annoying as I now have to daily manually change the minimum SOC limits to avoid discharging my batteries to low or only having limited solar production to recharge the batteries.