I found this on google. The experimenter, asims1956 at yahoo, claims to get these results using a PWM and 12V DC @ 12 Amps. KOH is the electrolyte. The water is under boiling temp, 150 - 170 F. Definitely a good showing of how Gibb's Free Energy can be applied. This could tap the engine's waste heat to heat the water and help spare your alternator.