Ok. Quick rundown is my BMV-712 will not reflect the correct percentage based on charge. I have been on tech support with my solar supplier (Battler Born Batteries) for weeks, we tried replacing the BMV (Victron sent a new shunt) but still no go.
My setup is this. I have 8 200W/24V panels going to two 100/50 Victron MPPTs then to a 270aH LiFePO4 from battle born. From there I have a Victron 1000w/12V Phoenix inverter going to a tiny load (a small 1A fridge and my laptop). The panels are grouped in parallel/series split between the controllers - so 400W/48V each - they don't see a lot of sun except midday (forest) but I am able to get a 14.60 voltage daily.
I am attaching screenshots of my MPPT/Inverter/BMV settings. As you can see my percentage and voltage don't lineup. I am also attaching a movie that captures the battery topping up during midday sun and showing no changes to %.
There thing that I notices that my be of importance is this - if I disconnect the inverter for the day then it will go to 100%. I did that early on thinking I had a dying battery (before I started looking at voltage) so would disconnect my offgrid setup and use my camper van fridge. Did that 3 times or so and coming back to my place noticed 100%. That was with 800W panels that have since doubled.
Here's a video: https://www.dropbox.com/s/v9sj2rv1j71h745/Solar.mov?dl=0
And pics:
So summary is that the battery monitor will not sync while under load from inverter. What should I do?
