I just installed two of these with my existing flex boss 21 and grid boss and 3-280 amp hour indoor batteries. Communication was not working properly and a firmware update had to be pushed by eg4. I don't know if you guys have anything to say on that or if you're going to update the firmwares in-house or put them out there so people can update the batteries themselves so they don't run into the same issue as I did.
Ryan