I have a MultiPlus 12/3000 with a Lithium battery with 2 wire BMS connected to the MultiPlus.
The switching of the MultiPlus from the BMS works great.
There is also a Venux GX, a BMV 712 and multiple BlueSolar MTTP 75/15 charger in my system.
It would be great if the MTTP BlueSolar Charger switch the load off, if the BMS disable allow-to-discharge signal on the MultiPlus. Same thing with the allow-to-charge signal.