SolarEdge

Creating an RS485 Bus Connection
9. The inverter is configured by default to LAN. If reconfiguration is required:
a. Make sure the ON/OFF switch is OFF.
b. Turn ON the AC to the inverter by turning ON the circuit breaker on the main
distribution panel.
c. Use the internal user buttons to configure the connection, as described in
Communication on page 43.
NOTE
If your network has a firewall, you may need to configure it to enable the
connection to the following address:
• Destination Address: prod.solaredge.com
• TCP Port: 22222 (for incoming and outgoing data)
10. Verify the connection, as described in Verifying the Connection on page 65.
Creating an RS485 Bus Connection
The RS485 option enables creating a bus of connected inverters, consisting of up to 31 slave
inverters and 1 master inverter. Using this option, inverters are connected to each other in a
bus (chain), via their RS485 connectors. The first and last inverters in the chain must be
terminated.
RS485 wiring specifications:
• Cable type: Min. 3-wire shielded twisted pair (a 4-wire cable may be used)
• Wire cross-section area: 0.2- 1 mm²/ 24-18 AWG (a CAT5 cable may be used)
• Maximum nodes: 32
• Maximum distance between first and last devices: 1 km /3300 ft.
NOTE
If using a cable longer than 10 m/33 ft in areas where there is a risk of induced voltage
surges by lightning, it is recommend to use external surge protection devices. For details
refer to: http://www.solaredge.com/files/pdfs/lightning_surge_protection.pdf. If
grounded metal conduit are used for routing the communication wires, there is no need
for a lightning protection device.
NOTE
If an electricity meter is connected to your inverter, it uses the RS485 port and therefore
an RS485 communication bus cannot be created.
The following sections describe how to physically connect the RS485 bus and how to configure
the bus.
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SolarEdge-Installation Guide MAN-01-00057-3.1