Check the listing for details. SMA Sunny WebBox RS485 | Communication Hub / Data Logger For PV Systems With Bus. Condition: New. Listed at 537.40 USD. SMA Sunny WebBox RS485 | Communication hub / data logger for PV systems with RS485 bus There Sunny WebBox RS485 (RS485 version) is the central unit for monitoring and data management of photovoltaic systems. Connected to the inverters via RS485 bus, it collects operational and performance information, archives it and makes it accessible remotely via Sunny Portal or the local network. Perfect for medium-large systems, it allows you to centralize diagnosis, analysis and error notification from a single location. This “RS485” version is ideal for installations where serial communication is preferred or already present in the infrastructure. Integration with Sunny Portal / remote access Ideal for systems with up to dozens of inverters Solution used historically: also available on the second-h.