You can play with your available space and the power available from the different turbines. The bigger and larger the turbines, the more cost effective, in general. One has to take installation costs into account.

Here is a table about the way to locate the different sizes, in general:

Size Location
Large (6 meters high) Land or very strong roof
Medium (4.5 meters high) Land or strong roof
Small (2.7 meters high) Land or regular roof
Mini (1 meter high) Personal size for a garden, a camping trip, a boat

What size generator do you pick for the large and medium models? In general, you will get the best returns as follows:

Wind Speed in meters per second Generator capacity in kilowatts
>6 5
5-6 3
<5 2

Now you are ready to place your order with information about number of turbines, size of turbines, the electrical capacity of the turbines. Have a look at our prices here.