Fatigue, in both physical and neuro form, is apparently quite common post-stroke. In my case, it has been pervasive so far throughout my recovery. Where it really hits the fan is when it disrupts my sleep pattern at night. Specifically, what I fell into before and have been falling into again lately is a pattern of taking an afternoon nap and then, perhaps subsequently, struggling with insomnia in the early part of the night. What seemed to help before was my doctor prescribing me a low-dosage neurostimulant (ritalin - yes, the stuff they give for adhd) which I would then take after lunch to help me get past that nap-hour. I wouldn't really "feel" anything when taking it, but I was able to break the nap/insomnia pattern the first time, so it's something to consider if you need a way to break such a pattern.
In my experience, I think it's been hard to separate neurofatigue from physical fatigue. My response to both is to want to nap, but I think that is counter-productive for fighting depression, yet another of the monkeys on our backs after a stroke. I think napping in response to neurofatigue mainly serves to destroy our normal sleep patterns, as it isn't physical rest we need, but neural/brain rest. I haven't settled on how to effectively do that yet, but it's a work-in-progress, so to speak. I think the ritalin is to neurofatigue essentially what caffeine is to physical fatigue.