Solis S1 WIFI + 4G Cellular Stick, With No SIM, 4 pin for all S5 inverters and below

SOL-S1-W4G-ST (Without SIM) (4-pin)          

Solis S1 WIFI + 4G Cellular Stick, SolisCloudready, With no SIM, 4 pin for all S5 inverters and below

Solis Data Loggers Features: 

Support WiFi and 4G communication

Status indicator, easy to display working status

RESET button, one key to send data, convenient debugging

Fault alarm, real-time monitoring Support Bluetooth nearby connection and debugging