Way too slow, and the fluctuating power demands are unpredictable. You can be doing perfectly fine, get one more thing, and crash out and game over before you can do anything to compensate.
Hi Deudanann, thanks for the comment!
As written down, "There is a day-cycle, for this reason the peak power has to be quite greater than the average consumption power."
It is not unpredictable (it's a shifted sinus function ;P) you just have to test its limits and be careful in the expansion. It's a game after all! ;)