Nols

I want to explain my findings on how my Smart load output functions.
In my opinion, there are discrepancies in Youtube videos from Sunsynk as well as their newest Installer Manual explaining this function.
I have a 150 litre geyser connected to mine and it operates as follows :
1) The solar power setting has nothing to do with the max power output - which is how they explain it. It is purely the PV power limit at which the relay will close and power the aux load Or open to disconnect, if it falls below the setting for a certain duration.  It does not limit the power output.
2) If you have grid available and the total load - normal loads + Smart load - exceeds the PV available, it draws the balance from the grid and not from the battery.
3) If grid is not available it draws the balance from the battery - Starting when battery reaches the "Aux load ON Batt" setting which is 100 % in my case.
   It switches off when the battery reaches " Aux load OFF Batt" - 95% for me.
   It will not come on again - even if PV surpases the Power setting (4000w for me)  until the battery reaches the ON Batt setting again.
4) On grid always on  will always supply power to the Smart load output, when the box is ticked and grid available.
   This can only be useful if manually enabled, after a rainy day, to "top up" your geyser.
Hope this is useful to someone.