There is a wet cell setup that uses 6 wet cells wired in series each carrying 2 volts. it is suppose to be the mother of all cause it is suppose to have a very low amp draw and very high output. The only reason I am not using that setup is because of the cost. I would need 14 cells, (because of my choice to run 6 neutrals not just 5) for a total of 28 plates. Almost doubling the cost of my system. Plus then I would have to assemble and maintain 14 cells not just one. Maybe if I convert my wife's car I will see about this system But I think trying to tackle it as my first build would be a little too much for me.