Hey,
Zou iemand me kunnen vertellen hoe ik in een bestaande 3 fasen off grid met 3x Multiplus 2 een extra Multiplus kan integreren om via een generator de batterijen bij te laden. Communicatie verloopt via Cerbo GX en Pylontech Us5000 vi CAN. Alvast bedankt voor de info.
Hi,
Could someone tell me how to integrate a fourth Multiplus 2 in an off grid three phase Multiplus 2 installation; it’s mainly how to communicate with the fourth Multiplus / Batteries US5000 / Cerbo GX. Thanks
Since it is offgrid and you are not using ess the inverter swt up doesnnot need to be symmetrical.
You could wire it in parallel with the phase you need extra power on and in the ve bus configurator add it to that phase and it will be fully controlled as the other ones are.
The other option is this one in the cerbo manual. But it does not use dvcc control.
Thanks for your reply, but i would prefer to have no AC connection from generator or grid to the three phase system ( only DC in common ) , is it possible to communicate with a fourth Multiplus who is only connected to the batteries and acts as only charger ?
Ah, I see you just need a charger from a single phase source.
In that case really you just need the voltages to be correct.
It is possible to see what it is doing but DVCC will not have control.
It may be possible to do something with node red if you want detailed control but for the most part voltage control on a lithium profile will be ok. One inverter is not likely to overpower a battery bank that is sized for 3 inverters in charge current and you are not likely to be running the generator through the whole absorbtion cycle either, it will mainly be bulk.