Hello Tim,
The Whisper 500 wind turbine may not be the right answer for you if your goal is to connect to the grid. Like a lot of wind turbines, this one is made to send the power it produces to a battery bank, not directly to the utility grid. Even the 220V "wild" AC version needs to be used in conjunction with a battery bank because its output is not consistently in the narrow range that the utility grid needs for code compliant connectivity.
This leads directly to your second question about what else would be needed to connect the wind turbine to the grid. In addition to the turbine and controller, tower and battery bank, you would need a grid-tied with battery back up inverter, appropriately sized AC and DC disconnects, suitable wiring, and a lightning arrestor wouldn't hurt either. That should cover most of the primary and secondary components.
There is another option from the same manufacturer, Southwest Wind Power. It is called the Skystream 3.7, and that wind turbine is made to connect directly to the utility grid, through the included inverter that carefully manages the turbine's output. You can learn more about it by clicking on the link below:
http://www.windenergy.com/products/products.htmI hope that helps!
Eric Pedersen
AltE Staff
877-878-4060 x141
eric @ altEstore.com