Hey
System:
- 75/15 PV Charger
- 2 x 12V LifePo4 100Ah in series (24V)
- Smartshunt 500A
- Victron Battery Balancer
- RasPi 4 as "Cerbo GX" with Venus OS
- Node-Red
I build my own adapters to get that VE.Direct Messages to the Pi. I can see all Data of them in Node-Red. All is fine.
But Sometimes (over time), my Batteries get out of synch, so one of them is drifting, and i get an error of my Smartshunt. But the charger wont see that - and the overvoltage batterie shuts down at 15V. Im using the Battery Balancer, but sometimes, it wont kick in, so one of my packs start raising the voltage - over the limits. because of the nature of the charger, it wont see that, so i tried to build my own "safety" with Node-Red.
But ive some trouble to do that.
As i know, i can send a "1" to swith on the charger - and a "4" to get it offline.
But i struggle, to "Or" with both batteries, because, if ONE of them has a higher voltage, as i want, the "4" should be send - and a "1", if all is okay.
In the switch note, i have the min and max voltages defined - and if im above a certain voltage, i want a "4" triggered.
I know, i can read the status of the difference, with the shunt, but i want to be flexible, and use my own voltages.
Can someone help me a bit, im very new to Node-Red, bus i cant understand, why this is not working....
Chris