Converting a complex solid into a shell

Hello everyone,

I have a solidbody , which is actually a wind turbine. The problem is that, it has been modelled as a solid. What I actually want is that the inside of the model is hollow. That means, instead of a simple solid body , I need it as a hollow solid, with a defined thickness. The shape of the turbine is complicated. How should I approach this problem? I am not sure, which tools to use here. Thanks in advance.

Vijil

SolidworksParts And Features