I remember that!! lol, wow that's going back some!
Not that I have a blind clue what I'm gibbering about but I guess you could always use a "donkey" gen engine to run the electrolysis then run the CA on the results..... would have to be one efficient generator to make it worth doing though! and would mean that you still ran on some pump gas
I can't remember if you can speed things up a bit if you use more voltage or more current

couple of step up/down transformers might help I guess lol!
Plus.... could cost a fortune in salt!
EDIT - Ignore the salt bit...... like I said it's been a while

....... although I'm sure it's a little relevent...... somewhere