Hello!
Can anyone tell is it okay to connect i.e 4 Pc´s of smartsolar 75/10 controllers in a way that BMS controls 4 pc´s of remote on off cables which are connected to the VE.direct port by using Rx function?
Thank you i.a!
Should be ok, but do check for ground voltage differences first. It may be that only one wire is needed to each port, rather than also connecting the ground references (if there are differences in the -ve drops more than 100mV)
There is only one wire on that remote cable. You can also put up to 70vdc to switch the conroller and i would think i will go for that. Through relay contact 24vdc and bms only controls the coil.
I presume then that you are using the Victron special cable into the VE-direct port for this?
I would back off considerably from the 70V max voltage, as the min is 6v, I would stick with 12,24 or 48V, whichever is most convenient. That will also provide any needed ground isolation.
Yes, it is victron non-inverting ve direct cable for solar controller and control voltage is 24 vdc.