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Hi, I’m trying to control my cell balancers via the Cerbo relays but am struggling to find how to. I tried using generator stop/start but the voltages are the wrong way around to accept high voltage rather than low voltage. I need to switch on a relay at 13.8V and then switch it off again at 13.7V. Is there a way it can be done? I also have a SmartShunt, Multiplus 12/2000 and 3 of 100/30 SmartSolars in the system.
I have used a BMV 702 s relay and used the high voltage alarm
or
using the virtual switchs is the multiplus you should be able to turn the aux1 on and off with the setting you are looking for .
I have never done it myself but this may work for you
The solution is really going to be based on what your comfort levels with node red or if you need a simpler solution and what components you have.
To be honest the voltage based trigger on the BMV suggested by @Paul B is a good option.
You can also do DC voltage based triggers in the inverter relays as well. Programmable relay assistant trigger aux/k1 based on DC voltage or when bulk is finished to start the balancing. Dont forget to set an off condition as well.
Do you know if the inverter relay still works if the unit is in the off position?
Logically not. Since off is off.
In the charger only possibly yes.
Thanks for the replies. I don’t have a BMV so I’ll have a look at the inverter relay. Was hoping to use the Cerbo as it’s easier to get to. It’d be nice to have more control options available. I was also looking to switch on the hot water element when I got a high state of charge.
