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What happens if we find a way to separate the hydrogen in a manner that doesn't take more energy to achieve than we can obtain from the hydrogen after the separation?

Then you have overturned the laws of physics and can condense the water after combustion of hydrogen, start the process over and build a perpetual motion machine.

Okay, that' was poor wording on my part. I don't expect there to be a net increase of energy. I expect there to be a reasonable cost of conversion.

Or you can stay in the present Universe as described previously. Sorry for the sarcasm but this as basic as trying to use water in its natural occurring state as fuel for a fire.

That's okay, I didn't think the comment out and infered something I know is impossible.

Explain to me why using solar to do that would be cost prohibitive.

This isn't an item of cost. If you use solar to generate the electricity, use an electric car and batteries. There is less wasted energy even with using the existing batteries of today. Putting Hydrogen in the middle just consumes more energy with less output.

In an economic sense, it is always an item of cost. I understand that your preference is to go electric. I understand your reasoning behind it, and I know it makes sense energy unit per energy unit. There are certainly things that I like about the idea. I don't see packing cars full of batteries to be a great alternative to what we are doing today. My preference would be to used hydrogen to generate the electricity on board the car to drive an electric drive system. That would probably be a less efficient way to do things, but would it be cost prohibitive?

My goal is to replace our current system with one that is cost comparitive. If it currently costs me $0.37 cents a mile to get to my destination, what will it cost me to use hydrogen to get to the destination? Will that cost be $0.17 per mile or $2.18?

If you're telling me that it would cost $2.18 per mile and that is rock solid, then you have a point. If you're telling me I could go the distance at a cost of $0.27 per mile with batteries, and $0.32 per mile with hydrogen, I'd probably prefer the hydrogen.