A 1 pump 5 dump system works just fine with any voltage. I ran one in an Infiniti that I had back in '99 with 4 batteries. It is not for everyone though. The only issue you run into with a 1-5 is fluid transfer. Basically it isn't optimal on something like a truck. Reason being the front weighs a lot more than the rear. We just made the plumbing simple with our manifolds. Before now we have always plumbed the 5 dumps together. It made for a lot more fittings. Here is a pic of a 1-5 plumbed together and a pic of our mainfold so you can see the difference.