I am not an electrician but it is my understanding that Watts = Volts X Amps. By reversing the formula, Doubling the Volts Means Dividing the Amps in Half and having the same watts. It is the Amps that melts wires and kills people who come in contact with electric. Therefore higher voltage mean slower amperage but the same safer wattage.
Electric pumps are not new, however high GPM pumps have not been real successful. My second Spray rig when I first Started out was homemade Presidential solution. It had TWO 5 GPM Shurflo pumps in Parallel to produce the volume of flow I wanted. While the system worked it burnt out the cheap pumps pretty regular. The GNC Battery pack is not an expensive set up however as these battery get worn WHAT might be the effect on the more expense Motor that doesn't receive enough amperage??? While the Hybrid Cars and Trucks are popular now, What is going to happen a few years from now when batteries and motor have to be replaced?????? With Gasoline engines we know the life expectancy and replace/repair costs.
"As Americans you have the right to be stupid." John Kerry
"Life is tough, but it's tougher when you're stupid.” John Wayne.