SMA Solar Technology AG
2 Safety
Installation Manual
SPW-WebconPB-IA-en-10
7
2 Safety
2.1 Intended Use
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 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.
The Speedwire/Webconnect Piggy-Back must only be operated with supported products
(see Section 2.2).
For safety reasons, it is not permitted to modify the product or install components that are not explicitly
recommended or distributed by SMA Solar Technology AG for this product.
The enclosed documentation is an integral part of this product.
• Read and observe the documentation.
• Keep the documentation in a convenient place for future reference.
Only use the Speedwire/Webconnect Piggy-Back in accordance with the information provided in the
enclosed documentation. Any other use may result in personal injury or property damage.
