I have already posted this in May but the answer I got there did not help me. I get, that Voltage is not really a good way to measure battery state but still my devices shut of at curtain voltages, and it's the easiest way for me to show the behaviour.
I am using the 700 for 3 months now together with a Raspberry Pi gateway. Everything works fine and I am happy. There is just one problem. How can I set the 0%.? The 14.4V is my 100% and if I use my 160ah battery to 9V It still showed 40% charge. Of course everything else (fridge, GPS...) has shut of at around 11V so that should be my 0% How can I change that? I don't have the BT dongle but can control everything else from the display or the Pi.
My setup
160Ah 12V lithium battery
MPPT 75/15 with 2x120W solar Panels -> connected to pi via Ve.direct USB cable.
230V battery charger
Relay to the camper's starter battery 12V, so I can charge while driving.
BMV 700, the shout is connected between the battery and everything else -> connected to pi via Ve.direct USB cable.
Pi has a backup battery so it does lose power last.