Grundfos SQFlex IO102 Wind Turbine Interface Box Pump Controller 

The IO102 is an interface for using the Whisper 200 AC output on a solar pump. The IO102 makes it possible to switch off the power supply in the system and to slow down or stop the wind turbine if there is no need for water supply or the system requires service. You will need a CU2oo control box if level switch is to be used.