Information On Integrating The Inverter Into A Local Network; Configuring The Inverter For A Static Network; Adjusting Network Ports - SMA SUNNY CENTRAL 500CP XT User Manual

SMA Solar Technology AG
4.6.2

Information on Integrating the Inverter into a Local Network

Protecting the local network from cyber attacks
• If the local network is to be accessible via the Internet, you can set up port forwarding via your router or
configure a VPN. Using a VPN is recommended.
• Protect the local network from cyber attacks by means of suitable safety measures such as setting up a
firewall, closing ports not used and allocating secure passwords.
Using a static IP address is recommended. You can select the IP address yourself. Use the address range which is
available to your router. If necessary, refer to the router manual.
If you are using a Power Plant Controller for the automatic control of your PV power plant, a dynamic IP address with
DHCP is not possible.
For further information on this subject, see the Technical Information "System Communication in Large-Scale PV Power
Plants" at www.SMA-Solar.com.
4.6.3

Configuring the Inverter for a Static Network

You can configure the IP address of the inverter for the control network and the monitoring network via the user
interface. Alternatively, you can also change the network settings of the inverter via the XML file custom.xml (see
Section 4.6.14, page 47).
Procedure:
1. Log into the user interface (see Section 9.4.1, page 78).
2. Select Sunny Central > Settings > Network.
3. In the field IP address, enter the static IP address that you want to use to access the inverter in the local network.
4. Enter the subnet mask of your network in the field Subnet mask.
5. Enter the gateway IP address of your network in the field Gateway address. Usually, the IP address of the
router has to be entered here.
6. Enter the IP address of the DNS server (Domain Name System) in the field DNS server address. Usually, the IP
address of the router has to be entered here.
7. Select the button [Save].
8. Select the button [Confirm].
4.6.4

Adjusting Network Ports

If you wish the inverter to be accessible via the Internet so that you can access it, for example, directly from
Sunny Portal, you must configure port forwarding in your router. This may require adjustment of the network ports.
For the various services, the communication unit of the inverter uses four network ports. If these ports are reserved for
other applications in your network, you can adjust the ports.
Adjusting the network ports
Check your access to the user interface before you change the setting Public virtual HTTP port on the user
interface. In most cases, the settings do not have to be changed manually, as the router automatically forwards
the queries to the correct ports via the network. Before adjusting the ports, contact your network administrator.
Unauthorized access to the inverter
If you activate the Modbus protocol, unauthorized access to the inverter will be possible. In this case, even users
without a password will be able to view the instantaneous values of supported devices or perform actions such as
changing the system time. Using a VPN is recommended.
Procedure:
1. Log into the user interface (see Section 9.4.1, page 78).
User Manual
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