Best way to swap between view modes

I've got a situation where I want the player to be able to switch between various views on their game scene. There will be normal mode, that shows all the normal materials, then specialised views - like in power view, all non-powered objects are rendered in a cool blue, but generators and power-consuming objects might be rendered green and red.

Is it possible to do this with shaders? If not, what is the best way to go about this?