Installation Manual

Backup Power Only - System Configurations

Additional Capacity and Power

For sites where additional capacity and power are needed (for example, to enable more backed-up loads to be powered

simultaneously), two StorEdge inverters and two batteries may be installed

. Each battery connects through a separate StorEdge

Inverter, and each inverter manages the battery and the PV connected to it. Backed-up loads are connected to each inverter

through separate load panels and auto-transformers The inverter connected to the meter operates as the system manager. An

RS485 Expansion Kit (available from SolarEdge) is installed in each of the inverters.

Figure 19: Additional capacity and power

► To configure RS485 Communication:

1 Install an RS485 Expansion Kit in each inverter.

2 Connect inverter 1 RS485 Expansion port to inverter 2 RS485 Expansion port using an RS485 twisted pair cable. Make sure to

terminate both sides (see Figure 5).

3 Configure inverter 2 RS485 Expansion port: Select Communication  RS485-E Conf  Enable.

4 Configure inverter 1 RS485 Expansion port:

 Select Communication  RS485-E Conf  Enable. Press Enter to continue.

 Select Protocol  Master.

5 Configure inverter 2 an RS485 Expansion port:

 Select Communication  RS485-E Conf  Enable. Press Enter to continue.

 Make sure that the connection is configured to Slave. Select Protocol  Slave

 Establish communication between inverter 1 and inverter 2:

 Select Slave Detect on inverter 1. Verify that the inverter reports the correct number of slaves. It needs to

be done before configuring slave inverters.

Additional capacity and power with one inverter will be supported in H2 2016 and will require new battery and inverter hardware.