Desubot wrote:Tau using (what i assume to be) fusion type reactors. probably wouldn't need THAAAT much space.
as well from what i understand, tau are very much against permanent outposts and would rather desert an area than to fortify it (permanently) (im probably competently wrong)
ID expect any sort of power generator to be Relatively small/ portable but i could see a a few of them being double stacked or relayed to get your cover.
Not sure where you got that bit of info from about them deserting territory frivolously - the Tau are stalwarts of their expansion philosophy, they expand aggressively and then dig in for the long haul. Giving up territory is usually their last resort, since their spheres of expansion rely on, well, expansion.
I agree with your assertion that their equipment is compact and portable, it has to be in order to ensure their rapid deployment and movement as they expand across worlds and systems. I'd imagine power generators you see on battlefields are these types indeed, as their larger more permanent ones meant to supply enormous quantities of power are likely only on worlds deeper inside the empire, as they're safer far from the front lines, supply greater populations and rarely, if ever, see the light of warfare.