SMA Solar Technology AG
4 Product Description
Installation Manual
SPW-WebconPB-IA-en-10
11
4 Product Description
4.1 SMA Speedwire/Webconnect Piggy-Back
The Speedwire/Webconnect Piggy-Back is a Speedwire communication interface with Webconnect
function for inverters.
Speedwire is a cable-based type of communication based on the Ethernet standard and the
communication protocol SMA Data2+. This enables inverter-optimised 10/100 Mbit data
transmission between Speedwire devices in PV plants.
The Webconnect function enables data transmission between a small plant and the Internet portal
Sunny Portal. In Sunny Portal, a maximum of four inverters can be combined in a Sunny Portal plant.
In Italy, the Speedwire/Webconnect Piggy-Back can be used for plants up to 6 kW that are
connected to the low-voltage grid. The Speedwire/Webconnect Piggy-Back implements grid
management for one inverter. The Speedwire/Webconnect Piggy-Back also receives specifications
from the network operator via Ethernet (in accordance with standard CEI 0-21). The network operator
sends the control signals to the Speedwire/Webconnect Piggy-Back via a network operator gateway.
The Speedwire/Webconnect Piggy-Back fulfils the following tasks:
• Set-up of a Speedwire network in small and large-scale PV plants
• Data exchange in a large-scale PV plant with Cluster Controller via a router/network switch
• Data exchange with Sunny Portal:
– in small plants via a router with Internet connection
– in large-scale PV plants via the Cluster Controller
• Data exchange with Sunny Explorer
• Additionally for Italy:
– Implementation of grid management for one inverter
– Active power limitation of the connected active power
– Remote shutdown within 50 ms
– Narrowing of the frequency limits to between 49.5 Hz and 50.5 Hz
– Automatic narrowing of the inverter frequency limits to between 49.5 Hz and 50.5 Hz when
the connection to the network operator gateway is interrupted
The Speedwire/Webconnect Piggy-Back is available as a retrofit kit.
