FoxESS Community - Owners & Installers Forum

Just remember that this method is meant to be read only - to update editable registers, you still need the dedicated wifi modbus adapter. I was only interested in real time monitoring via HA , so this will do me nicely.

also gents,
fox updated my evo firmware last night - i can now write MaxSOC on grid via the inverter.
the only constraint is that mode scheduler must be disabled (have queried if there is a way for me to toggle that via modbus).
But for me - i was only using mode scheduler for forced charge overnight - now i can set the max SOC on grid, I can default to the older Force Charge periods. Happy days.

Managed to get a full control loop going now!
Checks solar forecast tomorrow - works out a reasonable Max SOC at 7pm and writes it to the register.
Force charge happens in the last 100minutes of the IOGo cheap rate overnight.
To handle IOGo intelligent dispatching, HA checks the dispatch windows, and if car is plugged in - if plugged in, moves zappi from eco+ to fast to enable charge. Limits the battery discharge current to a value that roughly allows only the house load to discharge - to avoid battery drain into the EV.

and created a nice dashboard for that too!