Whisper 100 & 200 Wind Generator Multi Voltage Charge Controller Adjust to 12V/24V/36/48V
Whisper Controller (with display option) Features:   Displays total kilowatt hours   Displays peak amps   Displays peak and average wind speed (requires an anemometer, available separately from your wind       turbine dealer)   Manually adjusts voltage for any type of battery   Auto-Silent Mode - When batteries are full, wind turbine automatically shuts down   Fully adjustable from 12-48v. Even if you change system voltage in the future, it's easy to re-configure       the voltage in a few short steps.   The Whisper Charge Controller is specifically designed to optimize the performance of your Whisper 100       or Whisper 200 Wind Turbine.