The Deye 3U high-voltage battery rack (3U-HRACK) holds up to 12 Deye BOS-G Pro 5.12kWh modules (DEYE-BOS-G PRO) plus one cluster control box (DEYE-BOS-G-PDU-2).
It is a standard 19-inch rack sized for the BOS-G Pro's 3U modules: one rack takes a 61.44kWh cluster, and two racks bolted together take the 16-module maximum.