ISM band frequencies are used in uncountable industrial applications. It's not uncommon to use tens of kilowatts for some applications. A typical application in my area would be in RF Linacs. Each accelerator resonator would have its own phase locked amp of several thousand watts at 13.56Mhz for a total acceleration potential of several MeV. http://forum.allaboutcircuits.com/threads/picture-this.110947/#post-858188
Thanking you all for your comments. I think I understand what has been said. At present I am working with a scientific individual who believes that this frequency, 13.56Mhz can be used to seperate the water into it's two gasses. I am having no trouble with the frequency generation or a reasonable power level. The means how to feed the energy to the water I don't know.