Thinking a Battery Monitor.............

seems to be some confusion how the bluetooth is used. The shunt is still hard-wired to the display. The display then has the ability to connect to your phone. It doesn't mean you can't still use the display if you choose to walk over to it.

I find the bt very useful as I can be sitting outside with my phone and see how much solar I'm harvesting. It also makes setup much easier using the app than trying to enter it in using the display.