Save money in those cases when you install on the ground. This is a tank you can fill with water with patent pending supports inside the tank that match your turbine. All you have to do is level the ground. If you decide to change location later, you don't have to dig concrete out of the ground. They are modular and stackable, as the picture shows 2 of them. If your winds are very high, you should order the lower module as well. If you need help deciding, email us at email@example.com. This purchase is for the lower module. It will not work without the upper module.
The pictures of the base show the two modules with the bracket connecting them.