Solis S5
Within the Solis S5 inverter series a newer model has been launched in Q1 2025. These inverters have 2 communication ports instead of 1. A distinction is made in how to connect these different inverters.
1. Solis S5: 1 communication Port (COM)
1.1 Solis Datalogger S2 WL ST
(May 2025) Solis DataLogger alert:
We are experiencing issues with latest firmware for Solis DataLogger S2-WL-ST.
LIFEPOWR and Solis are looking for a solution.
The connection between FlexiObox and Solis inverter will be established through the local network, using the Solis datalogger S2 WL ST (Solis Dual LAN & WIFI Stick) in the COM port.
Strongly recommened to connect the datalogger with an UTP cable to establish a wired internet connection for the inverter. A wifi connection is possible however subject for less qualitative and less stable connection.
The datalogger will send data to SolisCloud and FlexiO combined.
Important to upgrade the Solis datalogger to firmware 100.121.b4.
A firmware upgrade needs to be requested at Solis support. Unfortunately at this moment it is not possible to execute this as 3rd party.
2. Solis S5: 2 communication Port (COM1 and COM2)
2.1 COM1 port (preferred)
This communication port is used to connect the Solis inverter to the FlexiObox true RTU. We highly recommend using this type of connection as this is more stable and reliable.
2.1.1 RTU Connection
The connection between FlexiObox and Solis inverter will be established by a serial cable (SFTP) and a LMGS adapter which you can find in the Lifepowr webshop.
Related: Where to order these products.
2.2 COM2 port
2.2.1 Solis Datalogger S2 WL ST
The connection of the Solis Datalogger will mainly serve for Solis Cloud. In case a problem occurs with the RTU connection on COM1 port, FlexiO can switch to the COM2 port and use the datalogger for it’s connection to FlexiO.
Strongly recommened to connect the datalogger with an UTP cable to establish a wired internet connection for the inverter. A wifi connection is possible however subject for less qualitative and less stable connection.
The datalogger will send data to SolisCloud and FlexiO combined.
Important to upgrade the Solis datalogger to firmware 100.121.b4.
A firmware upgrade needs to be requested at Solis support. Unfortunately at this moment it is not possible to execute this as 3rd party.
3. Solis Brand documents
4. Technical support
Visit the support page.