Interesting - so theoretically one could run the process off photovoltaics? Didn't know that!
Still, if we had to change to renewable sources of energy to run these processes tomorrow,the price would likely jump so enormously that their value would be mostly in niche applications.
https://en.m.wikipedia.org/wiki/Haber_process
Roughly 50% of the nitrogen in average humans was extracted from the atmosphere using this process; it is well-established.