US5000B and US3000C can be connected with up to 16 units per string without LV_HUB. (old version US3000/US2000 is 8 units)
LV-HUB - RS485/CAN Communication hub for use with the US Series rack mount batteries from Pylontech
LV-Hub is the communications hub for use with (multiple) strings of up to 8 units of US3000-C or 8 units of US5000B batteries.
A single LV-Hub can manage up to 5 strings of 8 batteries (ie. 40 batteries), and can be expanded up to 5 LV Hubs to manage a total of 200 batteries.
Systems containing between 2 to 5 LV Hubs will require 1 additional LV Hub to act as the Master Hub.
Note: After 16 units, you will need an LV_HUB to manage the multiple strings. Up to 6 strings of 16 batteries US5000B/US3000C per LV_HUB.
https://www.victronenergy.com/live/_media/battery_compatibility:lv-hub_communication_hub_product_manual_20210705.pdf
