# Fully Aquatic Engine prototype problem

by 91AFoust
Tags: aquatic, engine, fully, prototype
 P: 1 I want to know how you can turn down the amps and crank up the volts from any car battery. This is what I am going to use to slit Hydrogen and oxygen from water. (H2O) Also converting the O1 into O2. I believe a system that uses around 300w can produce the most hydrogen. Correct me if I am wrong. I am trying to build a Hydrogen Engine prototype that would not need outside air to burn back into water. This type of engine would theoretically be able to run underwater for long periods of time without using the extra air, and saving space. The problem is using a 24V system but converting it at last second to split the atoms with around 300w, and a normal car battery has around 200-1000 amps. I need around 12.5A. I only have one possible solution and that is to run it at 1.5-.3 to keep with in 300w, but I also want it made fast.
Mentor
P: 40,659
 Quote by 91AFoust I want to know how you can turn down the amps and crank up the volts from any car battery. This is what I am going to use to slit Hydrogen and oxygen from water. (H2O) Also converting the O1 into O2. I believe a system that uses around 300w can produce the most hydrogen. Correct me if I am wrong. I am trying to build a Hydrogen Engine prototype that would not need outside air to burn back into water. This type of engine would theoretically be able to run underwater for long periods of time without using the extra air, and saving space. The problem is using a 24V system but converting it at last second to split the atoms with around 300w, and a normal car battery has around 200-1000 amps. I need around 12.5A. I only have one possible solution and that is to run it at 1.5-.3 to keep with in 300w, but I also want it made fast.
Welcome to the PF.

Unfortunately your post makes no sense. You are mixing electrical units, and don't seem to understand yet how batteries and power converters work.

Are you saying that you will have a battery-powered submersible vehicle, and you want to use electrolysis to make H2 and O2, and then combine them in a combustion process in an internal combustion engine of some kind?

Why not just power the submersible directly with an electric motor powered by the battery? That will be more efficient, and much simpler.
 Mentor P: 11,524 A hydrogen engine only makes sense if you make the hydrogen somewhere else and then use it as a source of fuel for the submersible. Making it onboard is simply a waste of power, as you can simply use the electricity to run an electric motor much more efficiently.

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