question

The basic philosophy of the ESS algorithm is to "try" and supply the loads first.
If you have a parallel ESS system and you have DC coupled PV then you can force the battery to be charged only by PV if you switch the Inverter OFF.

if I set up a sheduled charging, with configured chargelimit lower than battery minimum soc, the system will charge the battery from aviable solar and blocks the discharge of the battery. The configured chargelimit prevents also charging from the grid e.g. with a MultiPlus II.

Have you tried setting the multi's switch to "charger only"?

This can be done via the soft switch on the remote console or via node red automation.

This is not what ESS is designed for.

If that doesn't yield the desired result you could also get creative and use node red to slowly raise the ESS min soc so that it remains in the zone where PV is dedicated to the battery and mains services loads.

Not quite what you want as ess will still prioritize your loads is to dynamically raise the ess min soc each time you have loaded a percent soc of the battery.

This will anchor whatever you loaded in the battery for later use..

You can do what you want but with ess that would be a mode 3 diy ess. This is not easy as the sun does not always shine the same, it can fluctuatie quite a lot and that requires playing with the grid point.. not an easy task. By prioritizing your battery you also take on the losses also.

You may be better use raising the min soc when loading from pv.

T.