Just a few quick points.

Fuel cell looks cool but likely still too expensive to be worthwhile.

The brown's gas stuff is all a hoax. They've been trying to sell these garbage plans on ebay for years. You need to ask the simple question of, 'if this really worked wouldn't automakers be licensing it'?

The answer is that electrifying tap water causes corrosion on the leads plus metals in the water would build up and eventually effect the engine. Yes, you can solve some issues with platinum rods and using distilled water but than gasoline becomes the cheap alternative! (I think someone had a post somewhere that said using Fiji water would only cost like $96.00 per gallon, LOL. - It's not distilled by the way).

So have fun tinkering, just don't think that you you've found an overlooked resource for solving the worlds power problems.