Hy all!
I read hundreds of pages, but it seems i haven't found the right answer.
I have a 3 Phase MultiPlusII 48 3000 35 System, with AC Couppled 5kW Inverter, an DC couppled MPPT and a DIY 48 V 260 Ah Battery Bank with active BMS.
-- this picture shows the system with battery Cut Off...,
My Problem is, that the Active BMS has no interface to any System, so I used an RaspberryPi, read the "Console" and write to the Colour Control GX via Modbus some data like SOC.
I even tell the MPPT and the PV inverter to stop Charging, when the System is in Island mode (ModbusTCP).
BUT.. when the Grid is connected, I can not tell the MultiPlus to use all available Energy to feed back to grid until the BMS shuts the Relay off itself ...
I am able to stop Charging the battery, but then the Multi does not use any power from the Battery ???? and I can tell the MPPT to stop working (all done via ModbusTCP)
My question is:
Can I stop Bulk and floatcharging via ModbusTCP? or do I have to make different settings?
The System knows the SOC, and i do not need any constant current. and so on.
Important: there is an active BMS. it shuts it's relay off when 100% is reached. no overshooting, no burning energy..
What I want is, that
when charging, and the soc is > 95 % the Charging Power to the battery should be reduced to 0 when 100 % is reached.
all access Power should go back to the grid.
when there is no grid, the Chargers should reduce themselves to 0
Please give me some Info / help