Southwest Wind Power Whisper 100 & 200 12-48V Controller

Normal Operation:
The EZ120/1600 is a rectifier and bulk charge regulator for the H40 and H80. The reg set point is set by a selector switch on the front cover, and the scale is in volts/ cell (Example for 24V system: 2.40 Volts/Cell x 12 cells in a 24V bank = 28.8V regulation setting, and so on). When the control circuit decides that the batteries are charged according to the set-point, the LED indicator light comes on as the circuit signals a FET switch assembly that serves as a relay to divert power to the external, resistive dump load.

IMPORTANT: The turbine, the solar input to the EZ (if there is any), and the battery bank itself is ALL diverted to dump load during regulation. As such, it's important that this controller be set higher than any other charge controllers that are on the same battery bank lest it try and suck whatever other charge sources the system has when it regulates.

The dump load is rated at 1600 W, hence, EZ120/1600. The turbine will peak at about 1200 W, which gives you headroom for only about 400 W of solar that you can wire through the unit without using an alternative solar controller. We tend to discourage customers from using the "solar" option in the EZ120 as there is quite a variety of superior, three-stage solar controllers out there, and the EZ120 is really a pretty crude bulk charger.

Mounting
The Whisper Controller must be mounted vertically with the LEDs and Diversion Switch to the top. Vertical mounting is required to provide good heat convection for the resistor bank (dump load). Since the dump load side of the controller may get very hot, do not mount the unit near anything flammable or heat sensitive. Conduit knockouts on the bottom of the controller unit accommodate 0.75”, 1.25”, and 1.5” nominal size conduit. An earth ground connection terminal is provided inside the controller between the turbine and battery mounting blocks.