I have Smart Solar MPPT 100/20 charger connected to Venus OS on RPI 3B over VE.Direct USB. I have connected 24V Battery system about 10m far from the charger. There are big diffrences in Voltage and temperature between battery and charger. For example 4A charging current then voltage differences 0,43V. 10A then voltage differences is about 1V !
I thought about something like Victron Smart Battery Sense and bluetooth connection but it is too far.
So I thought that I can make ESP32 voltage sensor for the battery and then send voltage over Ethernet to the Node Red on Venus OS connected to the charger. But is it posible to set voltage for example in every second in smart solar charger over Node Red or other way?
I tried manually but nothing works I mean when I connect for example using VictronConnect app I see Voltage differences ( for example 0,43V for 4A current)
root@raspberrypi2:~# dbus -y com.victronenergy.solarcharger.ttyUSB0 /Link/VoltageSense SetValue 26.30 root@raspberrypi2:~# dbus -y com.victronenergy.solarcharger.ttyUSB0 /Link/VoltageSense GetValue value = 26.299999237060547 root@raspberrypi2:~# dbus -y com.victronenergy.solarcharger.ttyUSB0 /Dc/0/Voltage SetValue 26.099996185302739