SolarEdge Home Battery 48V - Powering on the Battery Module; Module Power-Up Sequence

Figure 20: Connecting cables between the battery modules
4.
Connect the DC and communication cable of the first or last battery module to the
inverter. For ease of installation, SolarEdge recommends to connect the inverter to
the top battery module. See the inverter installation guide for connection
instructions.
NOTE
When you have multiple battery modules on top of each other, they are
connected in a way that the top connectors of the lower battery module are
connected to the bottom connectors of the upper battery module.
Home Battery 48V Installation Guide MAN-01-00954-1.1
28 Connecting Multiple Battery Modules