AC200L and B210 issue Not seeing battery in app

I just received the B210 battery for my AC200L , I attached with the correct aviation cable. Powered the AC200L then B210. I am not seeing the expansion battery in the app. I verified all connections . What am I missing?

Thanks

So the unit is maain AC200 L is fully charged and it won’t take anymore solar or grid power and the B210 battery is at 60%

I am having the same problem with my B230. Did you ever find how to correct this?

Yes, The issue was caused by not fully connecting the cable. So turn everything off and disconnected both ends and reconnect the cables, make sure they really connected. They may seem connected but are not.