Hi All,
Newbie here. I’m using a SmartSolar MPPT 100/30 and SmartBatterySense with two 110V Sunpower panels and two Lifeline GPL-6CT AGM batteries (6v batteries, wired in series for 12V). I’m looking at the Daily Battery Min/Max voltages showing on the History tab on the SmartSolar device software, and comparing that to the voltage graph on the Trends tab on the SmartBatterySense software. The lower end of the voltages on the SmartBatterySense graph are much higher than the lowest voltage showing on the Daily Battery Min/Max showing on the History tab on the SmartSolar interface.
For instance, I have one day when the SmartSolar interface is showing a min battery voltage of 11.87V, which is truly concerning to me, but cannot find anything near that low using the SmartBatterySense graph. Which interface should I trust more for voltage history? And is there a way to sync the two so they are showing a more accurate voltage history?
Thanks,
-Speedcat
Have you set up a VE Smart Network between the two so that the SmartSolar uses the battery voltage. Are you using the load output of the SmartSolar. When the SmartSolar is charging at high current have you used a multimeter to measure the voltage on the MPPT battery terminals and then the battery terminals to see if you have voltage drop.
I think there is a VE Smart Network between the two. How can I tell?
I am not using load output.
I have not tried a multimeter. Was hoping someone could tell me if there is normally some difference between the two devices and/or their software.
The usual case for voltage difference is due to voltage drop in wiring due to resistance, hence this is common. The larger the current flow the greater the voltage difference. this is why I say check with a multimeter, if you check MPPT and battery terminals with one meter then you know there is no error due to using different devices.
If you have a VE Smart Network set up you should see this on the VictronConnect app by the symbol highlighted below. Link to the VE Smart Network manual below.
.
Sometimes devices may have a voltage error, not often, again using a multimeter will confirm if this is the case. To check for discrepancy between devices do it when there is no charging or discharging. To check for high resistance connections and voltage drop check at high rates of charge or discharge.
