I have a Smart Solar MPPT 100/30 controller that charges a nominal 780ah battery bank. The bank has a Smart Solar Sense battery sensor connected to it. A Bluetooth VE Network was setup from the controller and the battery sensor was added to it. Both can see the other on the network and the Smart Battery Sense shows that is is supplying battery voltage and temperature data to the network, and the MPPT controller says that it is receiving the same data from the network.
However, the battery voltage that appears on the controller is much higher than that which is being given from the battery sensor. I can understand if the controller is displaying the voltage at the battery-out terminal of the controller, since the controller is 30' from the battery bank. However, the behavior of the charging output seems to be based on the controller's battery voltage display instead of the battery voltage given by the sensor.
It looks as if the controller is going to absorb charging before the battery actually reaches the absorb voltage as programed into the controller.
